Gmc ZEO6583 1974 User Manual

GMC

COMMERCIAL

TRANSMODE VEHICLE

X-7 5 80A

OPERATING MANUAL

MODELS ZE06083 AND ZE06583

IMPORTANT OPERATING, SAFETY AND MAINTENANCE INSTRUCTIONS

A WORD TO GMC OWNERS

. . .

This manual has been prepared to acquaint you with the operation and mainte­nance of only the chassis and body components of your Commercial TransMode
Vehicle, and to provide important safety information

. It is supplemented by con-

venient folders which provide additional information on vehicle maintenance,
emission control, and warranties

. We urge you to read these publications carefully
and follow the recommendations to help assure the most enjoyable and troublefree
operation of your vehicle

.

When it comes to service, remember that your GMC MotorHome dealer

knows your chassis and body components best and is interested in your complete

satisfaction
ance you may require

. Return to him for Guardian Maintenance Service and any other assist-

.

GMC Truck and Coach maintains a number of Zone Offices throughout the

country
nels, follow the procedure presented in Section 6 of this manual under the

"Owner Assistance"

. Should you have a problem that cannot be handled through normal chan-

heading,--

,

We would like to take this opportunity to thank you for choosing a GMC

product-and assure you of our continuing interest in your motoring pleasure
and satisfaction

.

GMC Truck & Coach Division

FOR

CONTINUING
ALLGM.
ONE OF THESE TRADEMARKS

GENERAL MOTORS PARTS ARE IDENTIFIED BY

SATISFACTION,

KEEP

YOUR

VEHICLE

:

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GMC COMMERCIAL TRANSMODE VEHICLE

Operating Manual

This manual should be considered a permanent part of the vehicle, and must

remain with the vehicle at time of resale

For vehicles sold in Canada, substitute the name General Motors of

Canada Limited, wherever the name GMC Truck and Coach Division appears

in this manual

All information, illustrations and

are based on the latest product information available at the time of publica­tion

. The right is reserved to make changes at any time without notice

.

.

specifications

contained in this manual

GMC Truck & Coach Division
General Motors Corporation
Pontiac, Michigan 48053

.

TABLE OF CONTENTS

Section

1

Before Starting Your Vehicle

2

Starting and Operating Vehicle

Steering Column Controls

Floor Controls

Instrument Panel and Controls

3

In Case of Emergency

4

Appearance Care

5

Service and Maintenance

6 Specifications, Owner Assistance, Index, Gas Station Information

@

General Motors Corporation

~

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1974

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Page

10

11

15

17

27

32

36

.

55

5

1

IMPORTANT INFORMATION

ON VEHICLE LOADING

OVERLOADING

MAXIMUM FRONT AND REAR AXLE
WEIGHTS (AS MANUFACTURED)

CAUTION

The components of your vehicle are de­signed to provide satisfactory service if
the vehicle is not loaded in excess of

either the Gross Vehicle Weight Rating

(GVWR) or the maximum Front and Rear
Gross Axle Weight Ratings (GAWR's)

specified on the vehicle identification

number plate

. Overloading can create
serious potential safety hazards and can
also shorten the service life of your ve­hicle

. Your dealer can advise you con­cerning proper loading conditions
your vehicle

.

GVWR

RATING

FRONT

4,200

GAWR

LBS

.

distributed over both the front and rear axles,
although not necessarily evenly

the maximum weight that the front axle can
carry (front GAWR) and the maximum weight
that the rear axle (rear GAWR) can carry
GVWR represents the maximum permissible
loaded weight of the vehicle
the manufacturer taking into consideration the

engine, transmission, frame, brake, axle and tire
capabilities

the ground can only be determined by weighing
the vehicle

highway weigh stations or other such commer­cial facilities
sult your dealer

The

10,500

weight

of

the

load

must

be properly

. The plate shows

. The

. It is established by

. Actual front and rear end weights at

. This can be accomplished through

. For assistance in this regard, con-

. Care should also be exercised

LBS

.

REAR

GAWR

7,000

LBS

.

*FRONT

FRONT
&

*Curb weight is the weight of the vehicle without driver, passenger, or cargo,

but does include fuel and coolant

CURB

CARGO

PASS.LOAD

TOTAL

MAXIMUM

3,725

475

LBS

4,200

LBS

TOTAL

Vehicle

LBS

.

.

.

WEIGHT

AT

GROUND

Loading (23' Model)

10,500

LBS

.

2

FRONT

4,200

GVWR

LBS

GVWR RATING 11,700 LBS

.

.

REAR GAWR

7,500 LBS

.

*FRONT

CURB

3,685 LBS

.

FRONT CARGO
& PASS

TOTAL

. LOAD

515 LBS

4,200

LBS

.

.

MAXIMUM TOTAL WEIGHT AT GROUND

*Curb weight is the weight of the vehicle without driver,

but does include fuel and coolant

Vehicle

to see that the load is distributed on both sides

of the centerline of the vehicle as equally as

possible

.

Loading

(

26' Model)

the GVWR and the front and rear GAWR's for
the vehicle to which they are attached

Gross Vehicle Weight (GVW) is the weight of
the vehicle itself, all items added to the vehicle

EFFECT

Your New Vehicle Warranty does not apply to
any part of your vehicle "which has been subject
to misuse

loading has been subject to misuse within the
meaning of this provision of the warranty

ALLOWABLE
WEIGHT

ON

WARRANTY

after it has left the factory, the driver and all
occupants, and everything that is loaded into

(or onto) the vehicle

." Any part which fails because of over-

.

ceed
of the loaded vehicle must not exceed the front
and rear GAWR's

LATERAL

VARIATION

The independent suspension on this vehicle

could be adversely affected by an unbalanced
load on either side of vehicle

front lateral weight variation is 250 pounds

. The allowable

.

The allowable rear lateral weight variation is

600 pounds

.

11,700 LBS

.

passenger, or cargo,

.

.

The GVW must not ex-

the GVWR

and the front and rear weights

.

GENERAL MOTORS CORPORATION

Q

WARRANTY MAY BE VOIDED IF WEIGHT EXCEEDS ANY OF RATINGS SHOWN
VEHICLE WEIGHT INCLUDES WEIGHT OF BASE VEHICLE, ALL ADDED EQUIPMENT, DRIVER
AND PASSENGERS, AND ALL PROPERTY LOADED INTO OR ONTO VEHICLE

RATINGS IN POUNDS-AS MANUFACTURED

GROSS VEHICLE WEIGHT FOR THIS VEHICLE

MAXIMUM FRONT END WEIGHT AT GROUND

MAXIMUM REAR END

VEHICLE IDENTIFICATION NO

WEIGHT AT GROUND

.

. GROSS

.

VIN (Vehicle Identification Number) Plate

The vehicle identification number plate shows

3

Vehicle

Identification

Plate

CAUTION

When

luggage

mended that the articles be secured in

place
such items from becoming dangerous
projectiles in the event of an accident

TIRES

It is important that the tires on your vehicle
be of the proper size, and be properly inflated

using your

or

. This precaution will help prevent

other

vehicletotransport

cargo,

it is

recom-

.

For continuing satisfaction keep your vehicle all
GM

. General Motors Parts are identified by one

of these trademarks

It is important to avoid over-inflation as well
as under-inflation
MAINTENANCE
tion pressures

REAR BUMPER LOADING

attachments, when attached to the rear bumper

Such items could nullify the energy absorbing
capabilities of the rear bumper
MotorHome service outlet can advise you as to

.

suitable means of attachment

:

. See the

section for proper tire infla-

.

Care must be taken with racks or temporary

SERVICE AND

.

. Your GMC

.

4

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~

BEFORE

STARTING

DRIVER CHECKLIST

Before Entering Vehicle

1.See

2

.

3

. Check that area to rear is clear if about to

Before Driving Off

. Lock all doors

1

2

. Position seat

. Adjust inside and outside mirrors

3
4

. Fasten seat belts

5

. Check that warning bulbs light when key is

6

. Release parking brake (and see that brake

. Be sure you understand your vehicle and

7

that

windows,

.

clean

Visually note inflation condition of tires

back up

turned to start position

warning light turns off)

how to operate it safely

REMINDER
when driving for greater security in the
event of an accident, to help keep chil­dren from opening door, and for greater
security against entry by unwelcome

persons while momentarily stopped

.

.

.

: Always lock entrance door

.

mirrors

.

.

.

and

lights

.

are

.

.

YOUR VEHICLE

KEYS

Two sets of keys are furnished with your ve­hicle

. Each key hasadifferent cross section so

that it can be inserted only in certain locks
Key

with

Square

Key

with

Oval

and other locking compartments

The code number of each key is stamped on
the "knock out" plug in the key head
dealer removed these plugs and placed them
with the spare set of keys in the special key

envelope that was given to you at the time of
delivery

•

•

cates can be made by your dealer or a locksmith
using the key code information

key from the vehicle whenever it is necessary to
leave the ignition key with an attendant

. For your protection

Record the numbers on the key envelope and
discard the key plugs

Keep the key envelope in a safe place such
as your wallet, NOT IN THE VEHICLE

In the event the original keys are lost, dupli-

Be sure to lock the glove box and remove the

Head-For

Head-For

ignition switch only

door lock, glove box

.

.

.

.

.

. Your

.

.

CAUTION

operated driver's seat while the vehicle
is moving-the seat could move unex

pectedly, causing loss of control of the

vehicle

: Do not move the manually

.

INSIDE REARVIEW MIRROR

Switch inside mirror to night position to reduce
glare from following headlights

To raise or lower mirror to achieve desired
field of view, grasp mirror and exert sufficient
pressure by pushing or pulling up, down, or
sideways

.

.

5

Inside Rearview Mirror

Seat

Track Mechanism

The seats can be swiveled to provide easy

entrance and exit
locking mechanism by moving seat swivel lever,

then turn seat

Check that
in position before driving off

swiveled during an accident the occu-

pant may be more likelyinjured
NOT adjust the driver's seat swivel or

fore and aft mechanism while the ve-

hicle is moving

unexpectedly causing loss of control of
the vehicle

. To turn swivel seat, release

.

CAUTION

all swiveling

. The seat could move

.

seats are locked

. If any seat

. D

O

ENTRANCE DOOR

SEATS

The driver and passenger seats in the driver
compartment may be adjusted to suit an indi­vidual's preference (except dual passenger seat)

To move seat forward or backward, simply re-

lease the seat locking lever located on the left
side of the seat

pressure in the direction desired

to lock the seat in the desired position

. Once released, exert slight body

. Release lever

.

DOOR LATCH

by inserting the key into the door key lock and

turning

.

tion

lock button DOWN
from the inside, pull the lock button UP and
pull on inside door handle

Door must be locked from outside the vehicle

. To unlock, turn in the clockwise direc-

. Reverse the direction to lock

To lock door from inside vehicle, push the

. To unlock and open door

.

.

Seat

Swivel

Mechanism

6

~

Entrance

LAP

BELTS

Your vehicle is equipped with lap belts in the
driver and front passenger seating position(s)
It is recommended that while the vehicle is in

motion, all occupants remain seated and keep

lap belts buckled snugly at all times

The front outboard seating positions-have
retractors which are designed to automatically

take up excess webbing

•

Adjust seat to desired position and sit erect
and well back in the seat

•

In a single motion, pull webbing across lap

far enough to permit inserting metal latch
plate end of lap belt into the buckle, until a

snap is heard

enough to reach the buckle, let the belt re­wind into the retractor to release lock mech­anism, so belt can be pulled out to the proper

length

•

Position belt across lap as LOW ON HIPS
as possible

under the belt during an accident, adjust to
a SNUG FIT by pulling belt firmly across
lap in direction of retractor so it can take up

slack

.

.

. If webbing is not pulled out far

. To reduce the risk of sliding

.

.

.

Door

Latch

should become jammed, you may be able to

release it by working the belt in or out until the

belt rewinds far enough to unlock

.

remains jammed or other parts of the restraint
system do not operate properly take the vehicle
to your dealer for service

Inboard seating position, front dual passenger

seat (if so equipped)
secured as above, and adjusted to a SNUG FIT

by pulling on the end of the belt extended from
the adjustable latch plate

. If lap belt

.

-should be positioned and

.

NOTE

: Take care not to let the lap belt twist

while it is being rewound into the retractor

bulk of the twisted belt may cause the retractor

to jam so it will not rewind further, while at the
same time the retractor's locking mechanism may
prevent the belt from being withdrawn

. The

. If a belt

7

Lap Belt (Front Seating Positions)

~

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~

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• To lengthen the lap belts at these seating po­sitions, place adjustable latch plate at right

angle to the belt webbing and pull on latch

plate

; belt should then slide easily through

the adjustment feature

•

To unfasten seat belts, depress push button

in center of buckle

CAUTION

A snug fit and a low lap belt position
are essential to lessen the chance of in-

jury in the event of an accident, because
this spreads the force exerted by the lap

belt in a collision over the strong hip

bone structure rather than across the soft
abdominal area

of injury in the event of an accident

never use the same belt for more than

one person at a time

belts in a twisted condition
belts or hardware to become pinched
between the seat structural

member or in the door

LAP

BELT

•

Periodically inspect belts, buckles, retractors,
and anchors for damage that could lessen the
effectiveness of the restraint system

•

Keep sharp edges and pointed objects away
from belts

•

Replace belts if cut, weakened, frayed, or
subjected to collision loads

•

Check that the anchor mounting bolts are
tight

•

Have questionable parts replaced

•

Keep belts clean and dry

•

Clean only with mild soap solution and luke­warm water

•

Do not bleach or dye belts since this may

severely weaken them

.

.

.

.

.

. To lessen the chance

-

; avoid wearing

; do not allow

(metallic)

.

INSPECTION

.

.

.

.

.

CHILD RESTRAINT

Children in vehicles should be restrained to
lessen the risk of injury in accidents, or sudden
stops

. In using any infant or child restraint sys-

tem, read and follow all installation and usage
instructions

All unused lap belts near the child should be
stowed properly to help prevent them from
striking the child in the event of an accident

.

Lap belts without storage provisions should have

buckles latched and belts adjusted to remove

slack

If a child is traveling in a vehicle not equip-

ped with an appropriate infant or child restraint

system, the following precautions should be

taken

1

. Infants unable to sit up by themselves should

be restrained by placing them in a covered

padded bassinet placed crossways in the vehicle

(widthwise)

restrained with the regular vehicle lap belts

2

. Children able to sit up by themselves should
be placed on a seat and lap belted . Never allow
a child to stand or kneel on any seat or else­where in the vehicle, once it is underway

Towing a trailer will affect handling, durabil-

ity and economy

tion depends upon proper use of correct equip-

ment and avoiding overloads and other abusive
operation

The maximum loaded trailer weight which

you can pull with your vehicle depends on what
special equipment has been installed
does not recommend towing any trailer OVER

1,000 POUNDS GROSS TRAILER WEIGHT
unless the vehicle HAS THE REQUIRED
EQUIPMENT
capabilities, special equipment required, and
optional equipment offered can be obtained by
writing to GMC Truck & Coach Division, Gen-

eral Motors Corporation, Technical Service
Department, Pontiac, Michigan 48053 (or in
Canada, by writing to General Motors of Can­ada Limited, Owner Relations, Department,
Oshawa, Ontario L1J 5Z6)

To assist in attaining good handling of the

Vehicle Trailer Combination, it is important
that the trailer tongue load be maintained at

approximately 10 % of the loaded trailer weight
Tongue loads can be adjusted by proper distri­bution of the load in the trailer, and can be
checked by weighing separately the loaded
trailer and then the tongue

When towing trailers, tires should be inflated
to the highest inflation pressures shown on tire
placard located on glove box door
able passenger and cargo load (GVW) of this
vehicle is reduced by an amount equal to the

.

trailer tongue load on the trailer hitch

.

. The bassinet should be securely

.

.

TRAILER

. Maximum safety and satisfac-

.

. Information on trailer hauling

HAULING

. GMC

.

.

.

. The allow-

.

8

~

MAINTENANCE

More
quired when being used to pull a trailer
to "SERVICE and MAINTENANCE" section
in this manual

BREAK-IN SCHEDULE

In addition to the "New Vehicle Operating
Speeds" given later in this section, it is recom-

mended that your new vehicle be operated for
500 miles before trailer towing
to tow during this period, avoid speeds over
50 MPH, and full throttle starts

frequent

1

. Trailer brakes are required on trailers

over 1,000 lbs

2

. DO NOT tap into vehicle's hydraulic

brake system if operation of the
trailer brake system requires more
than 0
ment from the vehicle's master cyl-

. The vehicle's master cylinder

inder
fluid capacity will not be sufficient to

operate both vehicle and trailer

brakes under all conditions of use if
more than 0

placement is required

. Whenever a trailer hitch is removed,

3

be certain to have any mounting
holes in underbody properly sealed
to prevent possible entry of exhaust
fumes, dirt or water
EXHAUST GAS CAUTION"

lowing section

.

.02 cu

vehicle

CAUTIONS

.-in

.02 cu

OPERATION

FOREIGN

Your vehicle's engine is designed to operate

on unleaded fuel of approximately 91 research
octane number

.

maintenance

. If it is necessary

.

. loaded weight

. of fluid displace-

.-in

. of fluid dis-

.

. (See

.)

"ENGINE

in the fol-

IN

COUNTRIES

. Refer

.

is

re-

If you plan to operate your vehicle outside
the continental limits of the United States or
Canada, there is a possibility that the best fuels
available are so low in anti-knock quality that

excessive knocking and serious engine damage
may result from their use
tion on the quality of fuels available in the
countries in which you plan to travel write to

GMC Truck & Coach Division, General Motors

Corporation, Pontiac, Michigan 48053 (or in

Canada write to General Motors of Canada

Limited, Owner Relations Department, Oshawa,

Ontario), giving

•

The vehicle identification number (from

plate attached to right side of dash panel or
from the registration slip or title)

•

The country or countries in which you plan

to travel

It is recommended that you do not operate
your vehicle in any country not having fuels

meeting the requirements of your vehicle's en­gine as these MAY CAUSE ENGINE DAM­AGE for which GMC Truck & Coach is not
responsible under the terms of the New Vehicle
Warranty or Emission Control Systems War-

ranty

NEW

Driving speeds for your new vehicle should
be limited to a maximum of 50 MPH for the
first 100 miles, and 65 MPH for the next 400

miles with no heavy throttle accelerations
your initial mileage is of the around-town vari­ety, which is considered "severe service" espe­cially in cold weather, be sure to include some

25 to 50 mile highway trips during the break­in period and vary the vehicle's speed

. To obtain informa-

.

.

.

VEHICLE OPERATING SPEEDS

. If

.

9

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STARTING AND OPERATING VEHICLE

ENGINE EXHAUST GAS CAUTION

(CARBON MONOXIDE)

Avoid inhaling

itself is colorless and odorless
unconsciousness and is potentially lethal

If, at any time, you suspect that exhaust fumes are entering the vehicle from any

source have the cause determined and corrected as soon as possible
before the cause is corrected, drive only with ALL windows FULLY open and heating or

cooling system adjusted for maximum ventilation (see below)

The best protection against carbon monoxide entry into the vehicle body is a prop­erly maintained engine exhaust system, body and body ventilation system
ommended that the exhaust system and body be inspected by a competent mechanic

•

Each time the vehicle is raised for lubrication or oil change

•

Whenever a change is noticed in the sound, alignment, or appearance of the exhaust

system

•

Whenever the exhaust system, underbody or rear of the vehicle is damaged

See your Maintenance Schedule folder for inspection procedure

To allow proper operation of the vehicle's ventilation system, keep front inlet

grille clear of snow, leaves, or other obstructions at all times

OCCUPYING A PARKED VEHICLE WITH ENGINE RUNNING FOR AN

PERIOD OF TIME

Do not run engine in confined areas such as garages any more than needed to move

vehicle in or out of area
engine running for any more than a short period of time, adjust heating or cooling
system to force outside air into the vehicle as follows

1

or high speed and upper control lever to any position except "OFF

lever should be adjusted to any position except extreme left "RECIRC

2

high speed, upper control lever to any position except "OFF," and lower control lever
to any position except extreme left "RECIRC

The two rear windows (if so equipped) should be closed while driving to avoid

drawing dangerous exhaust gases into the vehicle through those openings
tion, it is recommended that roof vent(s) be closed while driving
a rear window or roof vent must remain open for a period while driving, or electrical
wiring or other cable connections to a trailer must pass through the seal between them
and the body, the following precautions should be observed

•

Close all windows

•

in Step 1 or 2 above but with fan set at high speed

•

It is important that the inside engine cover be properly seated to prevent possible

leakage of exhaust fumes into the vehicle through this opening

.

. On vehicles not equipped with automotive air conditioning, set fan to medium

. On vehicles equipped with automotive Air Conditioning, set fan to medium or

Adjust heating or cooling system to force outside air into the vehicle as described

Air vents in the instrument panel should be fully open

exhaust gases because they contain carbon monoxide, which by

. Carbon monoxide is a dangerous gas that can cause

.

. If you must drive

.

. It is rec-

:

.

.

.

.

EXTENDED

IS NOT RECOMMENDED

. When vehicle is stopped in an UNCONFINED area with the

.

.

:

." Lower control

."

."

. In addi-

. If, for some reason,

.

.

.

.

NOTE

: Particular care should be taken to prevent the possibility of carbon monoxide

exposure when the vehicle is modified for recreational or other usage

some recreational vehicle appliances (such as lights, refrigerators, stoves, heaters) may

generate carbon monoxide and should be used only if there is adequate ventilation

1

0

. Additionally,

.

~

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~F~

STEERING COLUMN CONTROLS

ANTI-THEFT

COLUMN

The anti-theft ignition switch, located on the

right side of the steering column, has five posi­tions

•

ACCESSORY-Permits operation of electri-

STEERING

LOCK

1

2 . Place the transmission selector in "P" or
"N" ("P"
is designed to prevent starter operation while

cal accessories when the engine is not run­ning

. To engage, push key in and turn toward

you (counterclockwise)

•

LOCK-Normal parking position, locks igni-

.

tion and provides added theft protection by
preventing normal operation of steering

wheel and shift controls

. Key cannot be

turned to "LOCK" position and removed

until transmission is placed in "PARK

•

OFF-Permits turning engine off without
locking steering wheel and shift controls

•

RUN-Normal operating position

•

START-Permits engagement of starter

.

."

.

.

STARTING

. Apply the parking brake

is preferred)

ENGINE

.

. A starter safety switch

NOTE:The anti-theft steering column lock is not
a substitute for the parking brake

. Always set
the parking brake when leaving the driver's seat
unattended

.

If difficulty is experienced in turning the igni-

tion key and lock knob to unlock the ignition,

attempt to turn the steering wheel as hard as

possible in the direction the wheels are turned

.
At the same time turn the ignition-lock knob in
a clockwise direction with as much effort as you
can apply with your own hand

. Do not attempt
to use a tool of any kind to apply additional
force on the lock knob, as this could break the

knob

.

PARKING

When leaving the driver's seat unattended

•

SET PARKING BRAKE

on page 16)

•

Place transmission selector lever in "PARK

•

Turn key to LOCK position

•

Remove key from steering column lock (the

.

buzzer will remind you)

•

Lock entrance door if leaving vehicle

FIRST

.

.

(See note

."

.

.

E

A -

CRUISE CONTROL ENGAGE BUTTON

B -

TURN SIGNAL LEVER

C -

TILT-AWAY STEERING WHEEL LEVER

D - IGNITION SWITCH

E -

HORN BUTTON

F -

HAZARD WARNING FLASHER BUTTON

G -

TRANSMISSION SELECTOR LEVER

G

Steering Column Controls

Anti-Theft Steering Column

Lock

1

1

EXTREMELY
OR

AFTER VEHICLE

IDLE

FOR

COLD

SEVERAL

WEATHER

HAS

DAYS

(BELOW00F.)

BEEN

STANDING

Fully depress and release accelerator

two or three times before cranking
With foot off the accelerator

engine by turning the key to the

-

release key when engine starts

the engine

pedal, crank the

start position

.

pedal

.

IF

ENGINE

•

First, fully depress and release
tor pedal several times,
from accelerator pedal and crank

•

engine still does not start,

If
the accelerator pedal and hold

while cranking the engine

Transmission Shift Indicator

and Speedometer

•

If the engine has been flooded with
it may start to run but not
power to keep running

the transmission selector is in any drive

position

.

(If it is necessary to re-start the engine with the

in

"N"

vehicle moving, place the selector lever

3

. Depress accelerator

starter as outlined in the following,
conditions

.

pedal and activate

for different

.)

cranking with the accelerator pedal

pressed until the engine cleans itself of excess

gasoline and runs smoothly

•

If engine doesn't crank

discharged main battery

tery), place the battery switch in

BOOST" position

"BAT NORMAL" position

starts

COLD

release
by turning the ignition key
position-release when engine starts
starts but fails to run,
When engine is running smoothly

seconds) the idle speed
slightly depressing the

then slowly releasing

ENGINE

Fully depress accelerator

pedal and slowly

. With foot off the pedal, crank

to the "START"

repeat this procedure

(approx

may be reduced by

accelerator pedal and

.

the engine

. If engine

NOTE
more than 30 seconds at a time to prevent
ing overheating

.

. 30

the right side of the steering

.

: Do not continue cranking the

AUTOMATIC

The transmission selector lever

shift indicator is located in the bottom
the speedometer cluster on the dash

CAUTION

Extended

running

of

the engine (5

minutes or more) without depressing the
accelerator pedal, could cause

to the engine or exhaust system due
overheating

.

damage

to

•

"PARK"-Transmission
or while starting the engine

lever towards you to select

position
"PARK" position unless the vehicle

pletely stopped
other position in which your vehicle
started

WARM

hold while cranking the engine

ENGINE

Depress accelerator pedal about

halfway and

.

•

REVERSE "R" -For backing
Bring the vehicle to a complete

moving the selector lever into Reverse

FAILS

TO

START

:

the accelera-

then remove foot

engine

.

fully depress

to the floor

.

gasoline,

have enough

. In this case,

continue
fully de-

.

properly due to a

(automotive bat-

the "BAT

. Return the switch to the

when engine

engine for

start-

.

TRANSMISSION

is located on

column and the

section of

.

lock when parking

. Pull the

selector

or release this

. Never move the selector lever to

is com-

. "NEUTRAL"

is the only

may be

.

the vehicle

.

stop before

.

1

2

• NEUTRAL "N"-The out-of-gear position

.

It is provided for starting a stalled engine
while the vehicle is in motion or running the
engine while standing with brake
DONOT COAST IN NEUTRAL

a pplied

.

.

•

DRIVE RANGE
city and highway driving

The driving range for

"D"-

. This position per-

mits the transmission to operate through its
complete range of gear ratios and to select

automatically the proper ratio for road and

load conditions

•

SUPER RANGE "S"-Used when super per-

.

formance is needed for increased acceleration

in traffic, hill climbing, or "Engine Braking"

down-hill
from "D" to "S" and vice versa, under most
operating conditions
be used at speeds above 75 MPH

•

LOW "L"-Available for heavy pulling

through mud or sand and for engine braking

when descending steep hills

may be moved to "L" at any speed but the

. The selector lever may be moved

. "SUPER" should not

.

downshift in "DRIVE" range at speeds under

35 MPH by depressing the accelerator pedal
part way down

. The selector lever

TURN

LANE CHANGE FEATURE

transmission will only shift automatically

into Low range when the vehicle speed is

under approximately 40 MPH

. The trans­mission will not upshift from Low range as
long as the selector lever is in the "L" position

.

Whenever a right or left turn is intended,

when changing lanes, or when pulling away

from the curb, use the turn signals

•

FULL TURN-For normal turns, move the
turn signal lever to position "A" for right

CAUTION

Before
grade, down
reduce
gear

trol vehicle speed
frequent application of
which could cause overheating and thus

reduce brake effectiveness
when shifting into lower range or lower

gear on slippery surfaces with vehicle

moving-abrupt engine braking action
could cause the front wheels to skid,

possibly leading to loss of vehicle con­trol

descending

speed

. Use the lower gear ranges to con-

.

a

steep

a

mountain

and

shift

. Avoid prolonged or

or

hillside,

or

intoalower

the

brakes

. Use caution

long

turn and "B" for left turn

in position without manual effort until the
turn is completed, then cancel automatically

•

LANE CHANGE
position "C" for change to right lane or to

"D" for change to left lane

position until lane maneuver is completed,

then release

position

.

HAZARD WARNING FLASHER

For operation of hazard warning flasher, see

"In Case of Emergency" later in this manual

•

FORCED DOWNSHIFT -When additional

acceleration is desired to pass moving ve­hicles or to climb steep grades at speeds
between approximately 35 and 65 MPH, the

transmission can be downshifted by depress­ing the accelerator pedal completely to the

floor

. It is also possible to obtain a forced

The horn is actuated by depressing the rec-

tangular shaped GMC button located in the
center of the steering wheel

Turn Signal Lever

.

SIGNAL AND

.

. Lever will remain

.

-

Move lever to the detent

. Hold lever in

. Lever will return to "OFF"

.

HORN CONTROL

.

1

3

~

The tilt mechanism is operated by lifting up

on the small control lever, on the left side of the
steering column just below the directional signal
lever, then moving the steering wheel to the

selected position and releasing the lever

.

speed control system which is designed to allow

the vehicle to hold a selected speed of approxi-

mately 30 MPH or higher-depending on engine
limitations-thus increasing comfort and econ­omy on turnpikes, and other non-congested
highways

•

Tilt Steering Wheel

•

•

•

Cruise Control Lever

POWER

If the steering system power assist fails due

to some malfunction, or because the engine has

stalled, the vehicle can still be steered

much greater effort is required, particularly in

sharp turns

The tilt steering wheel can be tilted up above
normal position to provide additional room for
entrance and exit as well as selected driving
positions above or below normal height

.

TILT

STEERING

STEERING

WHEEL

•

. However,

.

CRUISE

The optional Cruise Control is an automatic

.

TO OPERATE

ment button is located in the end of the turn
signal lever
desired speed and momentarily push in the
engagement button, take your foot off the
accelerator and this speed will be maintained

TO RESET AT A FASTER SPEED ­celerate the vehicle to the desired higher
speed, push in the engagement button fully
and release slowly

TO RESET AT A SLOWER SPEED­Depress the engagement button fully and

HOLD
vehicle reaches desired speed, release the
engagement button slowly

FOR PASSING-You can increase your
speed by depressing the accelerator pedal

When you remove your foot from the pedal,
the vehicle will slow down to the cruising
speed set prior to the acceleration

TO DISENGAGE-Lightly apply the brake

pedal to disengage system

. Accelerate the vehicle to the

. Allow vehicle to decelerate

CONTROL

- The Cruise Control engage-

.

Ac-

.

. When

.

.

.

.

CAUTION

DO NOT use the Cruise Control when
conditions are not suitable for maintain-

ing a constant speed, such as in heavy
or varying traffic, or on winding or slip­pery roads

. With the Cruise Control en­gaged, removing foot from the accel­erator pedal does not permit engine

speed to return to idle

.

1

4

Vehicle Floor Controls

FLOOR

POWER

This

vehicleisequipped

draulic Split
also equipped with disc type brakes on the front

wheels and drum type brakes on the tandem

rear wheels

NOTE:Operation of the brake system warning
light is covered (on page 19) (in the section on

"Instrument Panel and Controls

.

BRAKE

System With Power Assist

SYSTEM

withaDual Hy-

.")

CONTROLS

. It is

1

5

CAUTION

Driving through deep water may wet

the brakes and adversely affect brake

performance so that the vehicle will not

slow down at the usual rate, and may

pull to the right or left

brakes lightly will indicate whether
they have been so affected
quickly, lightly apply the brakes while
maintaining a safe forward speed with
an assured clear distance ahead until

brake performance returns to normal

. Applying the

. To dry them

.

~

•

If excess brake pedal travel develops, drive
alternately backward and forward several
times and apply brakes firmly in each direc­tion

.

•

See your dealer if normal pedal travel is
not restored, or if there is a rapid increase
in pedal travel, which could be a sign of other

brake trouble

.

NOTE

on the brake pedal when not intending to brake

can cause abnormally high brake temperatures,

excessive lining wear and possible damage to

brakes

REMINDER:Front disc brakes have a built-in

wear indicator that is designed to make a high

frequency, squealing, or cricket-like warning
sound when the linings are worn to where re-

placement is required
intermittently

Parking Brake Control

•

On your vehicle, if power assist to the brakes
is interrupted due to a stalled engine or some
malfunction, two or more brake applications

can normally be made using reserve power

•

If the brake pedal is held down, the system

is designed to bring the vehicle to a full stop
on reserve power
is partially depleted each time the brake
pedal is applied and released
brakes when brake power assist has been

interrupted, except when necessary in order
to maintain steering control on slippery
surfaces

•

When reserve power is exhausted, the vehicle
can still be stopped by applying greater force

to the pedal

SELF-ADJUSTING BRAKES

Brakes on this vehicle (except for the Park­ing Brake) are self-adjusting, designed to elimi­nate periodic adjustments

Drum brake adjustments are made automati­cally as the brakes are applied while vehicle is
moving backwards

.

. However, the reserve power

. Do not pump

.

.

.

rolling, but will disappear when the brake pedal
is applied firmly
checks listed in the maintenance schedule folder

PARKING BRAKE

.

•

To set parking brake, pull up the handle
located on the floor against the left wall, be-

low the instrument panel

•

For maximum holding power, depress regular
brake pedal with the right foot at the same
time

•

To release parking brake push the handle
down

•

As a reminder, the "PARK BRAKE" re­minder light is designed to glow whenever

the parking brake control is not fully released,
and the ignition is on

•

Never drive vehicle with parking brake set

as this may overheat or otherwise damage
rear brakes

The amount of force required to apply park-

ing brake can be adjusted by turning a tension
adjustment knob located at the upper end of

the lever
application
the lever the greater the degree of brake appli­cation

"Riding The Brake by resting your foot

:

.

. The sound will occur

or continuously when wheels are

. See also the various brake

.

.

.

.

.

. This also adjusts the degree of brake

. The greater the force required at

.

.

Disc brake adjustment is made automatically

with each brake application

.

NOTE:The parking brake should be set first

whenever the driver's seat is left unattended

1

6

.

~

If the vehicle is parked on a grade and the

transmission is placed in "PARK" before the
parking brake is set, the weight of the vehicle
may exert so much force on the parking pawl in
the transmission that the transmission selector

lever cannot later be pulled out of "PARK

prevent this, the parking brake should be
plied BEFORE moving the transmission selec­tor lever to "PARK
the vehicle, the shift indicator should be moved
out of the "PARK" position BEFORE releasing
the parking brake

set the parking brake first, and release the trans­mission from "PARK" first at all times, even on
the level
called, does occur, it may be necessary to have
another vehicle nudge this vehicle up hill, to
take some of the pressure off the transmission

while the driver pulls on the transmission selec-

tor lever

. If "torque lock", as this condition is

.

." When preparing to move

. It is good driving practice to

." To

ap-

HEADLIGHT DIMMER SWITCH

To obtain high or low beam headlights, push

the foot dimmer switch locatedonthe floor to
the left of the brake pedal

is depressed, the light beam changes
beam indicator, on the face of the speedometer,
is designed to light up when the headlights are

on

high beam

The headlight circuits are protected by a

circuit breaker in the light switch
on the breaker will cause the lights to "flicker"
on

and off, or in some cases to remain off

this condition develops, have your headlight

electrical circuit checked immediately

INSTRUMENT PANEL AND CONTROLS

. Each time the switch

. A headlamp

.

HEADLIGHT "FLICKER"

. An overload

. If

.

SPEEDOMETER AND ODOMETER

The speedometer indicates the forward speed
of the vehicle in miles-per-hour
registers the accumulated mileage the vehicle
has been driven
ter cluster are the turn signal indicators which

show direction and proper operation of the turn
signals, the high beam indicator light, and the
shift indicator

. Also, located in the speedome-

.

. The odometer

FUEL GAUGE

This gauge shows the approximate fuel level

in the main tank when fuel selector switch is in

the "FUEL MAIN" position, and the fuel level

in the auxiliary tank when fuel selector switch
is in the "FUEL AUX" position
will indicate the correct positions only when the
ignition is in the "ON" position

Since both fuel tanks are interconnected, the

indicated level is designed to read the same

(with the switch in either position) until ap­proximately 60% of the total fuel capacity has
been used
this section

. See "Fuel Selector Switch" later in

.

. The pointer

.

This gauge registers the temperature of the

engine coolant The center area of the water

temperature gauge marks the normal operating
range

center area marks into the "H" side or hot area
of the gauge, stop the engine as soon as possible,
and remain stopped
heating is determined

This gauge registers engine oil pressure

consistency of the oil in a cool engine will cause
a high reading when the engine is first started
As the engine warms, the pressure will recede to
normal
operating temperature, minimum pressure at
idle should be slightly above the "L" graduation

(8 PSI)
pressure should be between the second and
middle graduations (35 PSI)
sure drop below these minimums, stop the en­gine immediately and check the cause of the low

oil pressure . This could be the result of a danger­ously low oil level in the crankcase . Driving the
vehicle with low oil pressure can cause extensive
engine damage

TEMPERATURE GAUGE

. However, if the needle moves beyond the

until

the cause of the over-

.

OIL PRESSURE GAUGE

. The

.

. With the engine warmed up to normal

. At normal operating speeds, minimum

. Should the pres-

.

1

7

I

. WINDSHIELD WIPER CONTROL

1

2

. SPEEDOMETER
. HIGH BEAM INDICATOR

3
4

. ODOMETER

5

. TEMPERATURE GAUGE

6

. FUEL GAUGE

Speedometer and

Gauge

7

. OIL PRESSURE GAUGE

8

. WARNING LIGHTS

9

. HEATER/A.C. CONTROLS

10

. LIGHT SWITCH

11

. WINDSHIELD WASHER

12

. SHIFT INDICATOR

Instrument

Clusters

13

. GENERATOR LIGHT
14 BRAKE SYSTEM WARNING LIGHT
15

. FUEL SELECTOR SWITCH

16

. BATTERY BOOST SWITCH
. RADIO & CONTROLS

17

18

. CIGAR LIGHTER

Panel

CHARGING SYSTEM WARNING LIGHT

Located to the right of the temperature gauge

is the charging system warning light
"GEN" will appear with the ignition key in the
"ON" position and the engine not running
light lets you know the warning signal is oper-

ational
your MotorHome dealer

. Should the light fail to come on, see

. When the engine is

started, the warning light should go out and re­main out

. If the light remains on when engine is
running, have your dealer locate and correct the
trouble as soon as possible

.

. A red light

. This

1

8

~

~

~

~

~

~

~

BRAKE

The service brake system is designed so that
half of the brake system will provide some
braking action in the event of a hydraulic leak
in the other half of the system

ing light, located to the left of the oil pressure
gauge, glows continuously when the engine is
running and after the brakes have been firmly
applied, it may indicate that there is a malfunc­tion in one part of the brake system

•

As a check on bulb condition the light should
glow during engine starting

•

Have system repaired if light does not come

on during check

•

This warning light is not a substitute for the
visual check of brake fluid level required as
part of normal maintenance

WHAT

•

The service brake system is partially inop­erative

1

. Pull off the road and stop, carefully-re-

membering that

•

Stopping distances may be greater

•

Greater pedal effort may be required

•

Pedal travel may be greater

2

. Try out brake operation by starting and

stopping on shoulder of road

•

If you judge such operation to be safe, pro­ceed cautiously at a safe speed to nearest
service outlet for repair, or

•

Have vehicle towed to dealer for repair

Continued operation of the vehicle in this con-

dition is dangerous

TELL-TALE WARNING LIGHT CLUSTER

A cluster of indicator lights is located just
to the left of the heater controls
signed to inform the driver of the status of

certain systems or conditions of which he should
be aware

SYSTEM WARNING LIGHT

.

TO

DO

IF

LIGHT

.

.

. Among these are

. If the red warn-

.

.

.

GLOWS

-

RED

:

.

.

.

then

.

. These are de-

•

"CRUISE" (Optional Equipment)
indicator is designed to glow GREEN when­ever the Cruise Control System is engaged
and working

•

"DOOR"- The door light is designed to warn
the driver that the entrance door is not prop-

erly closed

•

LOW AIR-The low air light is designed to
warn the driver that air pressure in the rear

suspension system is abnormally low
"Emergency Operation," page 26, later in this

section

•

"PARK BRAKE" -As a reminder, the

"PARK BRAKE" brake reminder light is de-

signed to glow whenever the parking brake

control is not fully released and the ignition

is on

•

"LOW FUEL" (Optional Light)

fuel warning light in your vehicle is designed

to come on when the main tank has less than

five gallons of fuel left and the fuel selector

switch is in the "FUEL MAIN" position

at any point after this, the fuel selector

switch is changed to "FUEL AUX" the

"LOW FUEL" warning light will then go

out and come on again when the fuel in the

auxiliary tank goes below five gallons

point both fuel tanks of your vehicle are

nearly depleted

•

"SET POWER LEVEL TO TRAVEL" (Op-

tional Light) -This light is designed to inform

the driver that the optional power level con-

trols should be set to the "TRAVEL" position

before driving the vehicle (also a buzzer will

sound for approximately 10 seconds)

will allow your vehicle's air suspension sys-

tem to automatically maintain the proper

suspension pressure while the vehicle is being

driven

this section

Warning Light

.

.

.)

.

.

. (See "Power Level System" later in

.)

Cluster

-

. (See

-

The low

. At this

. This

This

. If,

9

1

~

~

Fuel Tank and Battery Switches

WINDSHIELD

The windshield washers are controlled by the

Windshield Wiper, Washer,

and Headlight Controls

washer switch located under the windshield
wiper lever

. To operate the washers, turn the
wipers to an ON position, then push down on
the switch until the desired amount of washer

HEADLIGHT

SWITCH

The headlight switch serves four functions

1

. Pulling the switch half-way out provides
parking lights, instrument panel lights, tail lights,
side marker lights, and clearance and identifi-

cation lights

2

. Pulling the switch all the way out provides
all driving lights,
those mentioned above

3

. To dim instrument panel lights, turn switch
knob clockwise

4

. To operate the dome lights, turn switch
knob fully counterclockwise

.

-

this includes headlights, plus

.

.

.

fluid has been directed to the windshield

•

Check washer fluid level regularly

:

frequently when the weather is bad

•

Use a fluid such as GM OPTIKLEEN to

prevent freezing damage, and to provide bet-

ter cleaning

•

Do not use radiator anti-freeze in windshield
washer

•

In cold weather, warm the windshield with

.

; it could cause paint damage

defrosters before using washer
prevent icing that may seriously obscure

.

vision

FUEL

SELECTOR

The fuel selector switch, located below the
warning light cluster, has two positions-"FUEL
MAIN" and "FUEL AUX

WINDSHIELD

WIPER

LEVER

the driver to change the fuel pick-up and fuel
gauge sending unit from the main tank, as it

The windshield wipers are variable speed,

and hydraulically powered

. The lever control,
on the left side of the instrument panel varies
the speed of the wiper blades from stop

("DOWN" position) to fast (extreme "UP"

position)

.

goes empty, to the auxiliary tank which will
normally contain 7 to 9 gallons of fuel
recommended that any time the fuel system is
filled, this switch be put in the "FUEL MAIN"
position and left there until auxiliary fuel is

needed

.

WASHERS

.

-

do it

.

.

-

to help

SWITCH

." This switch allows

. It is

0

2

~

~

~

~

~

~

~

~

BATTERY BOOST SWITCH

The

GMC

Dual

Battery

System

provides

power from two batteries to the vehicle's 12-volt

OFF

i-k

M I

OFF

RECiOC COFD

electrical system either in combination or singu­larly

. The components used to provide charging

and/or switching are conventional, except for

a

diode assembly with which both batteries will
receive charging current whenever the vehicle is

running

. The diode assembly has separate out­puts to the two batteries and provides isolation
between the batteries and their associated cir­cuits whenever the engine is not running

.

Automotive Heating System Controls

(with Type 1 Fan Switch)

The main battery (or automotive battery)
supplies power to the chassis circuit
external lights, etc
the vehicle's internal area
etc

.

. The auxiliary battery powers

; i.e.,

; i.e.,

engine,

"FAN" lever to control speed of blower operation

internal lights,

"RECIRC," "COLD," "HOT" lever to control

temperature of air

"DEF" lever to control direction of air flow

The battery switch should be left in the "BAT
NORMAL" position, except when additional
power is needed for either battery circuit

. If this
is desired, change switch to "BAT BOOST" posi­tion

. After, use, it is recommended that switch

be returned to the "BAT NORMAL" position

NOTE:If the battery boost switch is left in the
"BAT BOOST"
this can result

position for extended periods

in both batteries being discharged

"FAN" lever works vertically and the other two
levers work horizontally

be placed in any combined position to deliver

the climate conditions most desirable at any
given time

.

.

•

TYPE 1 "FAN"-The fan switch has four
positions

; "OFF" and three blower speeds

ranging to "HI" and two unmarked posi-

.

tions between "OFF" and
not operate unless the top lever has been

The auxiliary battery will recharge itself

while the vehicle's engine is running

.

moved from the "OFF" position, and in order
to operate the fan in the "HI" position the

engine must be running

EATER

VENT~H

am

OFF

I

NOT

;

; "OFF," "VENT," "HEATER,"

. The

. The three levers may

"HI."The fan will

.

•

CIGAR-CIGARETTE LIGHTER

Push the lighter in all the way to operate

When it is heated sufficiently to use, it is de­signed to "snap" back to normal position with

noticeable sound

hand while it is heating

. Avoid holding the lighter in by

.

.

TYPE 2 "FAN"-The fan switch has four
positions
ranging to

; "LO" and three blower speeds

"HI."Fan will operate whenever

the key is in the "RUN" or "ACCESSORY"
position

. In order to operate the fan in the

"HI" position the engine must be running

For added safety, the cigar-cigarette lighter

has a heat-sensitive terminal which is designed

to melt and break the circuit if the lighter be-

comes overheated

HEATING SYSTEM (WITHOUT

.

~

11111kF~-

RiCiR1

:•COLD

AUTOMOTIVE AIR CONDITIONER)

The heating system controls are located on
the instrument panel to the right of the steering
column

. There are three separate controls

;

2 1

Automotive Heating

(with Type 2

A

i7Mr

System

Fan

.

HOT

Controls

Switch)

Automotive Air Conditioner Controls

(with Type 1 Fan Switch)

•

"OFF," "VENT," "HEATER," "DEF"-With

Automotive Air Conditioner Controls

(with Type 2 Fan Switch)

AUTOMOTIVE AIR CONDITIONER

the lever in the "OFF" position the system is
off

. With the lever in the "VENT" position

100% outside air enters the driver's com-

partment

. The air enters through the dash

mounted outlets and through the heater out-

. Temperature of incoming air may be con-

lets
trolled by moving the "RECIRC," "COLD,"
"HOT" (temperature) lever to desired posi-

tion

. Any one of the blower speeds may be

selected

.

With the lever in the "HEATER" position,
air will flow through the heater floor distribu­tor outlet (with slight flow of air to the de-

froster outlet)

. For maximum heat, move

temperature lever to "HOT" position and
"FAN" switch lever to "HI" position

. Heat-

ing system output can be varied by moving
temperature lever and "FAN" lever to differ­ent positions

.

With the lever in the "DEF" position, the sys-

tem operates the same as in the "HEATER"

position except most of the air flow will be

through the defroster outlets at the wind­shield

.

•

"RECIRC," "COLD," "HOT"-This lever, used
in conjunction with the system selector lever

("OFF,"

"VENT," "HEATER," "DEF") and

the "FAN" switch lever, will control the tem­perature of the output air being distributed

•

Clear windshield, rear window, outside mir-

.

The Automotive Air Conditioning System

offers year-round driving comfort

providing circulation of cool air during hot
weather, the system can provide warm air in
cold weather and dehumidify outside air in
humid weather

Combined air conditioning and heating sys­tem controls are located on the instrument panel
in the upper right-hand corner

separate controls
of blower

; "OFF," "A/C," "VENT," "HEATER,"

"DEF" lever to control direction of air flow and
which system is to be operated
"COLD," "HOT" lever to control the tempera­ture of the air
in many combined positions to deliver the cli­mate conditions most desirable at any given

time

.

•

TYPE 1 "FAN"-The fan switch has four

positions
ranging from "LO" to
operate unless the top lever has been moved
from the "OFF" position, and in order to

operate the fan in the "HI" position the
engine must be running

•

TYPE 2 "FAN"-The fan switch has four
positions
ranging to
the key is in the "RUN" or "ACCESSORY"

position

"HI" position the engine must be running

ror, and all side windows of ice and snow

•

before driving vehicle

.

"OFF," "A/C," "VENT," "HEATER," "DEF"

-With the lever in the "OFF" position the

•

Operate blower on "HI" for a few seconds
before moving the vehicle, to clear the air
intake of snow

.

system is off
position

"HOT" lever at "RECIRC" position) the air

. In addition to

.

. There are three

; "FAN" lever, to control speed

; "RECIRC,"

. The three levers may be placed

; "OFF" and three blower speeds

"HI."The fan will not

.

; "LO" and three blower speeds

"HI

." Fan will operate whenever

. In order to operate the fan in the

.

. With the lever in the "A/C"

(and the "RECIRC," "COLD,"

2

2

and

conditioning
blower automatically goes to "HI" speed pro­viding the engine is running
uses 80% recirculated air

provide maximum cooling
with "A/C" setting moving the tempera­ture lever to the "COLD" position provides

100% outside air
temperature lever to the right (toward
"HOT" position) will heat the dehumidified

air to the desired temperature
switch can be set to meet air flow require­ments

.

With the lever in the "VENT" position,

100% outside air enters the driver's com­partment

ods of less severe heat and humidity, air flow
is identical to air flow in "A/C" position, how­ever, the air conditioning compressor is not
operating
be controlled by moving the temperature
lever to the desired position

blower speeds may be selected

With the lever in the "HEATER" position,
air will flow through the heater floor dis­tributor outlets (with a slight flow of air to
the defroster outlet)

move the temperature lever to "HOT" posi-

tion and "FAN" switch lever to "HI" position

Heating system output can be varied by

moving temperature lever and "FAN" lever

to different positions

With the lever in "DEF" position, system op-

erates the same as in the "HEATER" position

except most of the air flow will be through

the defroster outlets at the windshield

system

. This setting is for use during peri-

. Temperature of incoming air may

is

activated

. This position

. This setting will

. In combination

. Further movement of the

. The "FAN"

. Any one of the

.

. For maximum heat,

.

the

•

Clear windshield, rear window, outside mir­rors, and all side windows of ice and snow

before driving vehicle

•

Operate blower on "HI" for a few seconds
before moving the vehicle, to clear the air

intake of snow

PUSH BUTTON "AM" RADIO

The "ON-OFF" switch is on the left-hand

center knob with the volume control
hand outside knob varies the tone response of
the receiver
to select the station desired

.

outside knob adjusts the volume of front and
rear speakers

In addition to the manual controls, this radio
provides five push buttons with which to auto­matically select pre-set stations

the push button "out" as far as it will go, tune

in the desired station manually, and then push

.

the button

Push Button AM Radio

.

.

.

."

AND

TAPE

DECK

. The left-

. The right-hand

. To pre-set, pull

RADIOS

. The right-hand center knob is used

"in

•

"RECIRC," "COLD," "HOT" -This lever,
used in conjunction with the system selector
lever

("OFF,"
"DEF") and the "FAN" switch lever, will
control the temperature of the output air
being distributed

Operate in "DEF" position for 30 sec­onds before switching to "A/C

will remove humid air from the system
and minimize rapid fogging of the glass

which can occur if humid air is blown

onto a cool windshield

"A/C," "VENT," "HEATER,"

.

CAUTION

." This

.

Repeat this operation for each push button

AM-FM RADIO

In addition to providing standard AM recep­tion, this set permits you to receive clear static­free FM broadcasts
the push buttons to the right or left to select

AM or FM reception
the same as described for push button
FMbroadcasts may be received as far as 25
miles from the sending station, depending on the
power of the station and the existing terrain
fringe areas, it may be possible to retune the

radio slightly to maintain peak reception
not, retune to a closer or stronger FM station

2

3

. Move the slide bar, above

. All other controls remain

r

adios

. In

. If

.

.

~

~

~

~

~

AM-FM

or switch to AM operation
be set for both AM or FM stations as follows

•

Place slide bar in AM position

•

Pull push button out as far as it will go, tune
in desired AM station manually and then
push button in to LOCK-IN position

•

Repeat for each remaining push button

•

Place slide bar in FM position and repeat
procedures outlined for AM band setting

IMPORTANT:Bands should not be changed if
push button is unlocked or radio may be
damaged

.

ANTENNA

The radio antenna is mounted on top of the
vehicle
antenna effectiveness on AM can be made by
your authorized GMC MotorHome dealer

STEREO

with the AM-FM radio
to turn the set on and off and for station selec­tion
ers are criss-crossed, with the left front and right

rear speakers reproducing the left channel, and
the opposite speakers reproducing the right
channel

as this adjustment has been made at the factory

Should it become necessary to make this adjust­ment, see your GMC MotorHome dealer
indicator light will be on when the radio is
tuned to an FM stereo station
on such stations will be in stereo

To Tune Your Stereo Radio

•

. If necessary, adjustments for maximum

RADIO

Stereo Receivers permit FM stereo reception

. For most pleasing stereo effect, the speak-

. Balancing the speakers is not required

Tune radio to an FM Stereo station (one

Deck

Stereo

(Tape

. Radio controls are used

Radio

with Tape

Removed)

. Push buttons may

.

. Most broadcasts

.

.

.

.

.

. The

AM-FM

which makes the indicator light come on with

:

.

a steady glow)

•

Tune the lever behind the station selector

knob until volume from front and rear speak­ers sounds equal

•

Regulate volume and tone controls as re­quired

STEREO TAPE SYSTEM

The optional Stereo Tape Player provides

prerecorded stereo programs for your enjoyment

To play, insert cartridge through tape door
with label side up and open end in first
will play through all four programs in succes-

sion, then replay in same sequence

the speakers is not required as this adjustment

has been made at the factory . Should it become
necessary to make this adjustment, see your
GMC MotorHome dealer

1

. Rotate fader control until volume from

front and rear speakers sounds equal

2

. Regulate volume control and tone controls

as desired

3

. To change program track, push in volume

control knob and release
to next track

4

. Push in the "eject" button to remove tape

cartridge from player

Cleaning and Care

Every 100 hours of operation, or if tape slips

and runs slowly, the capstan (revolving metal

post), head and tape guide should be cleaned

with a cotton-tipped swab moistened with
alcohol (do not use carbon tetrachloride)

Stereo Radio with Tape

Deck (Tape Installed)

.

.

.

.

. Tape

. Balancing

.

.

.

; player will index

.

.

. To

24

~

Power Level System Controls

clean the capstan, trip the "ON-OFF" switch at

the rear of the receptable with your finger and

hold the swab against the rotating capstan
IMPORTANT:When tape player is not in use,

remove the cartridge and store it in a cool, dry

place out of direct sunlight

not removed, the radio may be inoperative and
possible roller damage to the tape unit could
occur

.

. If the cartridge is

.

MOBILE RADIO TRANSMITTERS

Mobile radio transmitting equipment is sub-

ject to Federal Communications Commission
regulations and must be installed by a qualified
radio technician
tions for radio transmitters will vary depend­ing upon the radio equipment used
telephone equipment installed by your local
telephone company, citizens band radios and

electronic garage door openers will not adversely
affect vehicle operation

type of mobile radio transmitter is to be installed,
further instructions are required so that vehicle
operation will not be adversely affected
GMC Truck & Coach Division, General Motors
Corporation, Technical Service Department,
Pontiac, Michigan 48053 (or in Canada, contact
General Motors of Canada Limited, Product

Service Department, Oshawa, Ontario)

. The specific installation instruc-

. Mobile

. In the event any other

. Contact

.

POWER LEVEL SYSTEM

The optional Power Level System provides

the ability to level the vehicle at campsite or

parking area where the ground is not level

system overrides the automatic leveling feature

that maintains a constant ride height at the rear

tandem suspension
raise or lower the rear of the vehicle approxi-

mately 4 inches from normal ride height

The Power Level Controls are located to the
right of the steering wheel at the lower portion
of the dash panel

NORMAL

The controls consist of two knobs labeled
"LEFT REAR" and "RIGHT REAR
knob has four positions and is used as follows

"RAISE"-Knob in this position will raise rear

of vehicle to any desired level, up to a maximum
of 4 inches above normal ride height
desired height is reached, turn indicator on
knob to "HOLD" position

"HOLD"-When indicator line on knob is turned
to this position the appropriate side of the vehi-

cle will remain at that height

after being either in the "RAISE" or "LOWER"
position

"LOWER"-With the indicator line in this posi­tion the appropriate side of the vehicle will

lower a maximum of 4 inches below normal ride
height

. In order to maintain a desired height

turn indicator on knob to "HOLD

"TRAVEL"-Whenever driving vehicle on high-

. This

. The Power Level System can

.

.

OPERATION

." Each

:

. When

.

. This can be done

.

."

2 5

ways or improved roads place indicator line in
"TRAVEL" position

. This will automatically

the air suspension in this position has maximum
pressure supplied

maintain a constant ride height at the rear (ap­prox

. 8-inch ground clearance at rear)
minder light in the dash panel is designed to
light any time the engine is running and the
transmission selector lever is moved to "D"

(Drive Range)

.

When using Power Level the vehicle engine

need not be running to operate the system, how­ever, the ignition key must be in the "ACCES-

SORY" position

.

A glass of water or a bubble type level when
placed in a normally level location inside the
vehicle can be used to assist in determining the
desired level condition

.

. A re-

EMERGENCY OPERATION

In the event of total air loss ("LOW AIR" warn­ing light illuminated) for any reason, the vehicle
may be driven at a speed of 5-15 MPH (depend­ing on road surface) with the rear of the vehicle

in the fully "DOWN" position

exercised since ground clearance at the rear will

be at a minimum
nearest dealer

Depending on the type of failure, it may be
possible to add air to the rear suspension air
reservoir (shop air fill valve located on reservoir)
by filling reservoir at a local gas station (DO

NOT EXCEED 120 PSI)

.

.

. Care should be

. Vehicle should be taken to

.

OFF-ROAD OPERATION

In order to gain maximum ground clearance
both control knobs should be placed in the
"RAISE" position

. It is recommended that a

speed of 15 MPH should not be exceeded since

For continuing satisfaction keep your vehicle all

GM

. General Motors Parts are identified by one

of these trademarks

MAINTENANCE

No routine maintenance is required on the
Power Level System
MAINTENANCE section later in this manual
for "Rear Suspension" Maintenance

:

. Refer to SERVICE AND

.

2

6

~

~

~

~

~

IN

FOUR-WAY

WARNING

•

Use the warning flasher to warn other drivers
any time your vehicle becomes a traffic
hazard, day or night

•

Avoid stopping on the roadway, if possible

•

Turn on the hazard warning flasher by push­ing in on the button located on the column

just below the steering wheel

actuated with engine ignition either off or on

•

Turn signals do not work with hazard flash­ers operating

•

If the brake pedal is depressed, the lights will
not flash but remain continuously lit

•

To cancel the flasher, pull the button out

.

EMERGENCY

.

CASE OF EMERGENCY

HAZARD

FLASHER

.

. Flasher can be

.

.

.

STARTING

(as was your original-equipment Delco bat-

teries), or it must be a sealed-type battery

which does not have filler openings or caps

(Each Delco battery flame arrestor cap has

a grey disc rather than a small hole-see illus-

tration

.)

.

•

Engine cannot be started by towing or push­ing the vehicle

•

If only main (automotive) battery is dis­charged, set battery switch on instrument

panel on "BAT BOOST," this supplies cur­rent from the auxiliary battery
to "BAT NORMAL" position if jump start­ing is still necessary

•

A vehicle with discharged batteries may be
started by using energy from a battery in

another vehicle-called "Jump Starting

.

. Return switch

.

."

JUMP STARTING

Jump starting may be dangerous and should
be attempted ONLY if the following two condi­tions are met
commend that you leave the starting to a com-

petent mechanic

•

The battery in the other vehicle must be 12-

VOLT and NEGATIVELY GROUNDED,
like the batteries in your vehicle
other vehicle's owner's manual to see if it is

. If they are not, we strongly re-

.

. (Check the

.)

Hazard Warning Flasher

•

The batteries in your vehicle must be equip-

ped with FLAME ARRESTOR TYPE FIL­LER/VENT CAPS on ALL filler openings

Flame Arrestor Cap

2

7

Connecting Jumper Cable to

"VEHICLE BATTERY POSITIVE" Stud

Connecting Jumper Cable to

Right Radiator Mounting Bracket

CAUTION

Departures from these conditions or the

procedure below could result in
serious personal injury (particularly to
eyes) or property damage from such
causes as battery explosion, battery
acid, or electrical burns
damage to electronic components in
either vehicle

Never expose battery to open flame or
electrical spark-batteries generate a
gas which is flammable and explosive
Do not allow battery fluid to contact
eyes, skin, fabrics, or painted surfaces­fluid is a corrosive acid

CONTACTED AREA WITH WATER IM­MEDIATELY AND THOROUGHLY
careful that metal tools, or jumper cables
do not contact the positive battery ter­minal (or metal in contact with it) and

any other metal in the other vehicle,
because a short circuit could occur
teries and battery acid should always
be kept out of the reach of children

JUMP START

1

.

WEAR EYE PROTECTION and remove

.

PROCEDURE

; and/or (2)

. FLUSH ANY

: (1)

.

. Be

. Bat-

.

rings, metal watch bands, and other metal
jewelry

.

2 . Set parking brake firmly, and place auto­matic transmission in "PARK" (neutral for
manual transmission) in both vehicles
let vehicles touch)

. Also turn off lights, heater,

and all unnecessary electrical loads

3

. Attach one end of a jumper cable to the

positive terminal (identified by a red color,

; (don't

.

"+",

or "P" on the battery case, post, or clamp), of
the battery in the other vehicle and the other

end of the same cable to positive terminal junc­tion block stud, marked "VEHICLE BATTERY
POSITIVE
cess door above the batteries

4

. Attach one end of the remaining jumper

." This is located behind the right ac-

.

cable FIRST to the negative terminal (black
color,

"-",or"N")

of the OTHER vehicle's bat-

tery, (regardless of which vehicle has the dis­charged battery) and THEN to the right radia-

tor mounting bracket in THIS vehicle-thus tak­ing advantage of your battery's flame arrestor
feature, should a spark occur

5

. Start the engine in the vehicle that is pro-

viding the jump start (if it was not running)

.

.
Let run a few minutes, then start the engine in
the vehicle that has the discharged battery

6

. Reverse the above sequence EXACTLY

.

when removing the jumper cables, taking care
to remove the cable from the right radiator

mounting bracket in THIS vehicle as the

FIRST step

.

I

2

8

~

~

~

~

~

ENGINE COOLANT

To

avoid

remove radiator cap while engine and radia-

tor are still hot, because the cooling system

will blow out scalding fluid and steam under

pressure

•

Do not remove radiator cap to check engine
coolant level
see-through coolant tank

•

Proper coolant level at normal engine operat-

ing temperature is between the "FULL" and

"ADD" marks on the reservoir

•

Coolant should be added only to the reservoir

(see SERVICE & MAINTENANCE section

details)

JACK

the

danger

.

; check coolant visually at the

.

USAGE

INSTRUCTIONS

of

CAUTION

being

.

burned,

.

CAUTIONS

do not

for

1

. Follow jacking instructions in order to re-

duce the'possibility of serious personal injury

2

. The jack is designed for use only when

changing wheels

3

. Never get beneath the vehicle when using

jack

.

4

. Do not start or run engine while vehicle

is on jack

.

.

.

INSTRUCTIONS

•

Park on level surface and set parking brake
firmly

.

•

Set transmissionin"PARK"

•

Activate Hazard Warning Flasher

•

Block both front and rear of the wheel diag­onally opposite the jack position

•

Loosen but do not remove wheel nuts

.

.

.

.

I

Jacking at Front of Vehicle

•

JACKING AT FRONT -

Place hydraulic

jack on wood block near energy absorbing

front bumper bracket
of front cross-member

. Place hook at flange

. Pass chain under
bumper and adjust chain length to snug fit
on fork on top of jack

.

Jacking at Rear of Vehicle

2

9

~

~

~

TOWING

Location for Disconnecting Height

Control Valve Link

•

JACKING AT REAR-Place hydraulic

on wood block close to rear suspension

ket (see next page)

the drainage slot under bracket
length so link will fit in fork at

•

Close valve at base of jack and

handle

•

Always operate
motion

•

Raise vehicle so tire just clears

.

.

place wheel and slightly tighten

. The hook is

. Adjust

top of jack

insert jack

jack with slow,

surface, re-

wheel nuts

placed in

smooth

jack

brac-

chain

Proper lifting and towing equipment

sary to prevent damage to the

any towing operation

. State (Provincial

vehicle during

ada) and local laws applicable to vehicles
must be followed

. Detailed towing

are available at your MotorHome

is neces-

in Can-

to tow

instructions

dealer

.

Your vehicle may be towed on all six wheels,
at speeds less than 35 MPH, for distances
50 miles, provided the final

mission, and steering system are

mally operable

. Use only towing equipment

drive, axle, trans-

otherwise nor-

up to

specifically designed for this purpose following
the instructions of the towing equipment
facturer . A separate safety chain system
used

. For such towing the steering

locked, transmission in neutral

brake released

front crossmember
associated

. Attachments must

. Do not attach to bumpers or

brackets.Remember

brakes and power steering

and the parking

assists will not be

available when engine is inoperative

TOWING AT FRONT

On vehicles equipped with the

.

System, turn the valve dials,
ment panel, to "HOLD" position,

Power Level

below the instru-

thereby mak-

manu-

must be

must be un-

be to engine

that power

.

ing the automatic height valves inoperative on

the rear suspension

with the optional Power Level System
necessary to disconnect the height
link at the rear suspension control
cent to the shock absorber stud)
the vehicle

. Raising front of vehicle so front

wheels are four inches off the ground
vide about five-inch

.

rear when towing

. On vehicles

not equipped

control valve

arm (adja-

on each side of

ground clearance at the

.

it will be

will pro-

•

Open valve at base of jack to

lower, then

fully tighten wheel nuts.Proper torque is

250 foot pounds

Use

lug

wheel
tightening sequence shown in the SER­VICE AND MAINTENANCE section)

the earliest opportunity have wheel nut
torque checked
prevent loosening or stripping of the

wheel nuts

nuts securely.(Follow

.

CAUTION

wrench

.

provided

. This is necessary to help

to

the

tighten

nut

. At

TOWING AT REAR

It is not recommended that vehicle
with the rear raised as this could
pension or crossmember damage

FREEING VEHICLE FROM SAND, ETC

If it becomes necessary to

rock the Motor

be towed

result in sus-

.

Home to free it from sand, mud, or snow,
the transmission selector lever

from "D" to "R"
in a repeat pattern while simultaneously
ing moderate pressure to the accelerator
race engine

30

. For best possible

traction, avoid

.

Do not

.

move

apply-

Towing Vehicle

spinning wheels when trying to free the vehicle
The use of GM Liquid Tire Chain is recom-

mended for temporary assistance when traction

is lost on ice or snow

.

CAUTION

.

Do not spin wheels in excess of 35 MPH
as indicated on the speedometer

. Per-

sonal injury and severe damage may
result from excessive wheel spinning

including tire disintegration or differen-

tial failure

The rear window of the vehicle in an emer­gency can be used as an exit
gency exit, pull the ring located at the top center

.

EMERGENCY

EXIT

. To use the emer-

3 1

Emergency Exit Pull Ring

~

~

of

the

rear

window

moved,

frame

gency

and

then
. Do not pull ring except in case of emer­. The window is not hinged, and it is de-

until

push

window

the

glass

For continuing satisfaction keep your vehicle all

. General Motors Parts are identified by one

GM
of these trademarks

seal

out of the

is

re-

:

signed to be pushed out
will not fall on anyone outside the vehicle
careful of possible broken glass on ground when
exiting from the vehicle

. Take care that window

. Be

.

APPEARANCE

CARE AND CLEANING OF INTERIOR

(DRIVER'S COMPARTMENT)

GENERAL INFORMATION

Dust and loose dirt that accumulates on
interior fabric trim should be removed fre­quently with a vacuum cleaner, whisk broom or
soft brush

wiped regularly with a clean damp cloth
mal trim soilage, spots or stains can be cleaned
with GM cleaners or equivalent

Before attempting to remove spots or stains
from upholstery, determine as accurately as pos-

sible the nature and age of the spot or stain

Some spots or stains can be removed satisfac­torily with water or mild soap solution (refer to
"Removal of Specific Stains" later in this sec­tion)
removed as soon as possible

. Vinyl or leather trim should be

. Nor-

.

. For best results, spots or stains should be

.

tard, etc
cases, impossible to completely remove
cleaning this type of stain or soilage, care must
be taken not to enlarge the soiled area

sometimes more desirable to have a small stain
than an enlarged stain as a result of attempted
cleaning

The listed cleaners are EXCELLENT CLEAN­ERS when used properly according to directions
on containers and are available through most

G.M. Dealerships

.

•

Clean only with mild soap solution and luke­warm water

CARE

., are extremely difficult and, in some

. When

. It is

.

.

LAP BELT CARE

.

Some types of stains or soilage such as lip-

sticks, some inks, certain types of grease, mus-

•

3

2

Do not bleach or dye belts since this may
severely weaken belts

.

PART

NO

G.M.

.

QUANTITY

CLEANERS

DESCRIPTION

1050244

1050417

1050803

16 oz

. can

Gallon can

16 oz

. Container

G.M. Fabric Cleaner (Solvent Type)

G.M. Fabric Cleaner (Solvent Type)
G.M. Multi-Purpose Powdered Cleaner

(Foam Type)

1050429

6 lb

. can

G.M. Multi-Purpose Powdered Cleaner

(Foam Type)

INTERIOR

GLASS

should be gently scraped off trim material with
a clean DULL knife or scraper

The interior glass surface should be cleaned

on

a periodic basis for continued good visibility
A commercial household glass cleaning agent
containing ammonia will remove normal tobacco

smoke and dust films sometimes caused by in­gredients used in vinyls, plastics, or other inte-

rior trim materials

.

LITTLE CLEANER, light pressure, and clean

.

cloths (preferably cheese cloth) . Cleaning ac­tion should be from outside of stain FEATHER­ING towards center of stain and constantly
changing to a clean section of cloth
stain is cleaned from fabric, immediately dry

area with an air hose, heat dryer or heat lamp
to help prevent a cleaning ring (use caution with

CLEANING

FABRICS

IMPORTANT:Be sure vehicle is well ventilated

while using any cleaning agents

. Follow manu­facturer's recommendations in using such prod­ucts

.

heat dryer or heat lamp to prevent damage to
fabric material)

. If a ring forms, immediately
repeat the cleaning operation over a slightly
larger area with special emphasis on FEATH­ERING towards center of area

sists, mark off adjacent trim sections and clean
entire affected trim panel section with G

CAUTION

Many cleaners may be toxic or flamma-

ble, and their improper use may cause
personal injury or may cause damage to
the interior
interior, do not use volatile cleaning sol­vents such as

enamel reducers, nail polish removers
such cleaning materialsaslaundry soaps,
bleaches or reducing agents (except as
noted in the adjacent fabric cleaning in­structions on stain removal)
carbon tetrachloride, gasoline or naphtha

for any cleaning purpose

. Therefore, when cleaning the

: acetone, lacquer thinners,

; or

. Never use

.

Multi-Purpose Powdered Cleaner as described in
the following

DETERGENT FOAM CLEANER

:

CLEANING

G.M. Multi-Purpose Powdered Cleaner is excel­lent for this type cleaning and for cleaning a
panel section where a minor cleaning ring may
be left from spot cleaning

Vacuum area thoroughly to remove excess

loose dirt

. ALWAYS clean a full trim assembly

or complete trim section-mask adjacent trim
along stitch or welt lines

Powdered Cleaner in strict accordance with di-

CLEANING

CLEANING

G

.M

. Fabric Cleaner (Solvent Type) is ex-

FABRICS

FLUIDS

WITH

cellent for spot cleaning stains containing grease,
oil or fats from fabric type trim

. Excess stain

rections on label of container-mix proportion­ally for smaller quantities
ON A CLEAN SPONGE or SOFT BRISTLE
BRUSH-DO NOT WET FABRIC EXCES-

SIVELY OR RUB HARSHLY WITH BRUSH

IMMEDIATELY AFTER CLEANING WIPE

. USE VERY

. When

. If ring still per-

FABRICS WITH

.

. Mix Multi-Purpose

. USE SUDS ONLY

.M

.

4

.

3

3

OFF

ANY
SLIGHTLY
OR CLOTH

CLEANER

DAMP

.

RESIDUE

ABSORBENT

WITH

TOWEL

PASTE OR WAX TYPE SHOE POLISH
Light application of fabric cleaning fluid

TAR-Remove excess with dull knife, moisten

IMPORTANT- IMMEDIATELY
FORCE-DRY FABRIC WITH AIR HOSE, HEAT

DRYER OR HEAT LAMP

.

AFTER

(Use caution with heat

dryer or heat lamp to prevent damage to fabric

WIPING,

with fabric cleaning fluid, scrape again, rub
lightly with additional cleaner

BALL POINT INK-Try rubbing alcohol

.)

stain remains after repeated operations, no

When trim materials with a sheen or luster

other measure should be tried

finish are dry, wipe fabric lightly with a soft,

dry clean cloth to restore sheen or luster

.

LIPSTICK-Difficult to remove
works on some brands
repeated applications, do not try other measures

REMOVAL

CANDY-Chocolate, use cloth soaked in luke­warm water

. Dry if necessary, clean lightly with fabric

water
cleaning fluid

CHEWING GUM-Harden gum with ice cube
and scrape off with dull knife
fabric cleaning fluid and scrape again

FRUIT STAINS, COFFEE, LIQUOR, WINE,

SOFT DRINKS, ICE CREAM AND MILK-

Wipe with cloth soaked in cold water

sary, clean lightly with fabric cleaning fluid
Soap and water is not recommended as it might

set the stain
CATSUP-Wipe with cloth soaked in cool water

If further cleaning is necessary, use a detergent
foam cleaner

OF

SPECIFIC

STAINS

MUSTARD-Damp sponge with warm water,

; other than chocolate, use very hot

.

then rub detergent on dampened stain and work
into fabric
several times

BLOOD-Wipe with clean cloth moistened with

. Moisten with

.

cold water

URINE-Sponge stain with lukewarm soap suds
from mild neutral soap on clean cloth, rinse with

cloth soaked in cold water

. If neces-

.

one part household ammonia and five parts
water, apply for one minute, rinse with clean,

.

wet cloth

.

VOMITUS-Sponge with clean cloth dipped in
clean, cold water

.

water and mild neutral soap

.

treat area with a water-baking soda solution

. Rinse with clean damp cloth

. Some discoloration may remain

. Use no soap

(one teaspoon baking soda to one cup of warm
GREASE, OIL, BUTTER, MARGARINE AND
CRAYON
Use fabric cleaning fluid

-

Scrape off excess with dull knife

.

water) . Rub again with cloth and cold water

.

Finally, if necessary, clean lightly with fabric

cleaning fluid

.

-

.

.

. If

.

. Cleaning fluid

. If stain remains after

.

. Repeat

.

.

; saturate cloth with

. Wash lightly with lukewarm

. If odor persists,

.

EXTERIOR

The best way to preserve the finish is to keep

it clean
required to maintain its original beauty

the vehicle with either cold or warm (never
hot) water, not in the direct rays of the sun and

not while the sheet metal surfaces are hot

. Normally only frequent washings are

APPEARANCE

. Wash

alleviate the destructive forces of salt, calcium

chloride, salt air, exhaust gases, and industrial

. Never

fallout (which may be corrosive)

CARE

BRIGHT

Wash all bright metal parts frequently to

wipe dirt from dry painted surfaces because this
may scratch the finish

and chemical detergents should be avoided
Cleaning agents should be promptly flushed
from the surface and not allowed to dry or they
may streak the finish

. The use of strong soaps

.

a strong alkali solution, rinse thoroughly
use of bright metal polishes containing harmful

.

abrasives

3

4

Use lukewarm water and mild soap, not with

.

METAL

PARTS

.

. Avoid

NOTE:In severe cases, road oil and tar may
be removed from bright metal parts by a chemi­cal cleaner which is specified safe to use on all
acrylic finishes

A protective coating such as GM Chrome

Gard may be applied on clean chrome surfaces

which are stain and rust free

Chrome Cleaner and Polish may be used to re­move rust from chrome plated parts before ap-

plying a protective coating

Never wipe glass with dry paper or cloth

not operate wipers when glass is dry

insects can be removed with clear water or with
a mild liquid household cleaner
harsh abrasives should be avoided
spection and replacement of wiper blades will
reduce the possibility of the windshield becom-

ing scratched and will assure clear vision under
adverse driving conditions

.

EXTERIOR

. If necessary, GM

.

GLASS

. Do

. Dirt and

. The use of

. Periodic in-

.

Prompt washing may not remove thoroughly
these deposits and, particularly in geographical
areas where exposure conditions are severe
Properly applied polishes and waxes of known
quality will provide the best protection
GMC MotorHome dealers offer polishes
waxes which can be of real value in maintaining
a good paint finish

NOTE

moving road oil and tars from painted surfaces,
are detrimental to acrylic enamel finishes
purchasing a cleaner, make sure the instructions
on the container specifically state that the con-

tents can be used on any acrylic enamel finish

Nicks and chips in paint surfaces should be
touched up before weathering action begins

best time to detect them is right after the vehi-

cle has been washed
your vehicle's color is available at your GMC

MotorHome dealer

. Most

or

.

:

Some chemical cleaners, used for re-

. When

TOUCH-UP

. Touch-Up Paint to match

.

PAINT

. The

.

.

POLISHING

Even though the acrylic enamel on your

vehicle is durable, under certain conditions

it may be advisable to wax or polish your vehi-

cle to provide added protection

and other salts, road oil and tar, tree sap, chemi­cals from factory chimneys and other foreign

matter may damage any known vehicle finish if
allowed to remain in contact with the paint film

ANDWAXING

Due to the fiberglass and aluminum body con­struction of the vehicle added protection by
additional undercoating is not necessary

. Calcium chloride

For continuing satisfaction keep your vehicle all
GM

. General Motors Parts are identified by one

of these trademarks

ever, if
material, it should be kept off of all moving or

rotating parts
ditioner fittings, body drain holes, exhaust sys-

.

tems, and plumbing

:

UNDERCOATING

. How-

you

do wish to apply undercoating

. It should also be kept off air con-

.

3

5

SERVICE AND MAINTENANCE

CAUTION

As with any machinery, extreme care should be taken when performing
any inspection, maintenance or repairs so as to prevent accidental injury
Improper or incomplete servicing could result in vehicle operational prob­lems which may lead to personal injury, or damage to the vehicle or its

equipment

have the service performed by a competent serviceman

. Should you have any question about performing any service,

.

MAINTENANCE SCHEDULE

.

For owner convenience, a separate maintenance
folder has been provided with your vehicle
which contains a complete schedule and brief

explanation of the safety, emission control, lubri­cation and general maintenance it requires
maintenance folder information is supplemented

. The

Exterior Compartment

3 6

Location(Typical)

by this section of the Operating Manual, as well
as the separate emission control systems folder

also furnished with your vehicle

. Read all three

publications for a full understanding of vehicle
maintenance requirements

ACCESSIBILITY

.

EXTERIOR COMPARTMENTS

Your vehicle has an entrance door on the
right side and six compartment doors
cations are shown on the following illustrations

Be sure the doors are secured tightly to pre­vent their opening after vehicle is in motion

There are two front access doors on your

vehicle
each door

through the right access door are the batteries,
engine oil fill, radiator, radiator cap, engine cool-

ant reservoir and the air conditioner receiver­dehydrator sight glass (optional)
be checked or filled through the left access door

are the windshield washer reservoir, brake mas­ter cylinder, engine oil dipstick and the air

compressor

ing them by turning the latch knob to the right

to prevent the doors from opening after the vehi­cle is in motion

. Turn the latch knob to the left to release

. Items that can be checked or filled

.

Be sure to secure the access doors after clos-

.

. Their lo-

.

.

. Items that can

Before pouring fluid into any filler open­ing anywhere on the vehicle, or allow-

ing anyone else to do so, make certain
that the correct filler opening, and type
of fluid has been selected
choice could result in serious personal

injury or property damage

Front

CAUTION

Access

. A wrong

.

I

Doors

Right

Front

Access

Compartment

Left Front

3

7

Access

Compartment

Automatic Transmission Fluid

1

Dipstick and Fill Tube

2 Generator
3 PCV Filter
4 Engine Temperature Sending

Unit

5 Thermostat Housing

6 Carburetor Attaching Bolts (4)

Engine Compartment

ENGINE ACCESSIBILITY

Access

cover located between the driver and passenger

seats
two rear corners by securing bolts . The securing
bolts have rings and may be loosened or tight-

ened by hand or screwdriver

to the engine is provided by an engine

. The cover is designed to be secured at the

. The cover is de-

signed to be secured at the front by a retain­ing lip

ing bolts and lift up using the wire loops
install the engine cover place the cover in its

frame and slide forward as far as possible
Tighten the securing bolts

3

8

.

To remove the engine cover loosen the secur-

. To

.

.

CAUTION

It is essential that when installing the
engine cover it be fully seated to its seal

and secured by the lip at its forward

edge and the securing botts at its rear-

ward edge

. Do NOT allow cables, car­peting, floor mats or any other material
to interrupt the seat between the cover

and the engine compartment

. If the en­gine cover is not correctly installed and
seated, engine exhaust could leak into
the passenger compartment creating a

safety hazard (see the carbon monoxide
caution at the beginning of the section

on STARTING AND OPERATING VEHI-

CLE)

. If the engine must run with the
cover off for maintenance purposes, care
should be taken to assure that the vehi­cle's interior is well ventilated

.

Removing Engine

Access

Cover

ENGINE COMPARTMENT LIGHT

The optional engine compartment light (lo-

cated behind right front access door) is turned

ON when access door is opened
tached to a 25-foot cord, may be removed from

engine compartment for use as necessary

HOISTING INSTRUCTIONS

A twin post hoist of sufficient capacity and

with proper adapters and/or fittings must be
used

.

Front hoisting position is the front engine

crossmember

Rear hoisting must be done at the rear sus­pension brackets
is used it should be approximately 82 inches in

length to gain adequate support at suspension

brackets

If vehicle is to be placed on safety stands for

maintenance or repairs, the hoisting points

should be used

.

. If an "I" beam type adapter

.

.

. The light, at-

.

the suspension points noted (see dia-

gram)

. Before raising, check overhead

clearance to see that it is sufficient for
the vehicle

for hoisting or maintenance
signed for use only when changing tires

FRONT ENGINE

CROSSMEMBER

. Do NOT use the vehicle jack

. It is de-

.

REAR SUSPENSION

BRACKETS

CAUTION

To help avoid serious damage to your
vehicle, the vehicle should be raised
only on twin post hoists of 15,000

pounds or more total rated capacity, at

3

9

DENOTES APPROVED

Vehicle Hoisting Points

LIFTING POINTS

~

~

~

~

LUBRICATION DETAILS

ENGINE

A high quality SE oil was installed in your

engine at the factory

ENGINE

OIL

AND

RECOMMENDATIONS

FILTER

change this factory-installed oil prior to the
recommended normal change period

check the oil level more frequently during the

•

Use only SE engine oil

.

break-in period since higher oil consumption is
normal until the piston rings become seated

•

Refer to Maintenance Schedule folder for oil
change and filter replacement intervals

.

NOTE

oils are specifically not recommended

•

See your GMC MotorHome dealer for advice
on the frequency of oil and filter changes
under unusual driving conditions

.

use of SE engine oils and proper oil and filter
change intervals assure you of continued proper
lubrication of your vehicle's engine

The recommendations in the Maintenance

Schedule folder apply to the first change as well

as subsequent oil changes

. The oil change inter­val for your vehicle's engine is based on the use
of SE oils and quality oil filters

. Oil change in-

RECOMMENDED

•

Single grade oils are preferred, however, mul­tigrades such as SAE 1OW-30 or 1OW-40 are
also acceptable

tervals longer than those listed will seriously
reduce engine life and may effect GMC Truck &
Coach's obligation under the provisions of the
New Vehicle Warranty

.

•

SAE 5W-20 oils are not recommended for
sustained high speed driving

•

SAE 5W-30 oils (if available) may be used
if extreme low temperatures are anticipated

. It is not necessary to

. However,

.

: Non-detergent and other low quality

. Only the

.

SAE

VISCOSITY

.

.

.

Z

N

°`

W
N

-

-120

-

-110

-

-100

-

-90

-

-80

_ -70

-

-60

-

-50

-

-40
32

20

10

10

20
25

30

30

Engine Oil Viscosity Chart

SA

20

w

20

.E

SUPPLEMENTAL
OIL

ADDITIVES

ENGINE

The regular use of supplemental additives is
specifically not recommended and will increase
operating costs

. However, supplemental addi-

tives are available that can effectively and eco­nomically solve certain specific problems with-

.

out causing other difficulties

. For example, if

higher detergencyisrequired to reduce varnish

S.A.E

10

.

and sludge deposits resulting from some unusual
operational difficulty, a thoroughly tested and
approved additive-"Super Engine Oil Supple-

1111111111

ment"-is available at your GMC MotorHome
dealer

. In the event of an operational problem,
consult your dealer for advice before using sup­plemental additives

CHECKING

OIL

.

LEVEL

The engine oil should be maintained at the

proper level

. The best time to check it is before
operating the engine or as the last step in a fuel
stop

. This will allow the normal

in the engine to drain back into the crankcase

oil

accumulation

.

40

Removing

Engine Oil

Dipstick

Engine Oil

To check the level, remove the oil level dipstick
located inside the left front access door, wipe it
clean and reinsert it fully for accurate reading

.

The oil level dipstick is marked "FULL" and

"ADD

." The oil level should be maintained with-

in the margin, neither going above the "FULL"
line nor below the "ADD" line

stick firmly after taking the reading

. Reseat the dip-

. One (1)

quart will raise the oil level from "ADD" to

"FULL

NOTE

."

: The oil dipstick is also marked "USE
SE ENGINE OIL," as a reminder to use only
SE oils

.

Dipstick

TRANSMISSION

Removing Transmission

The transmission dipstick and fill tube is lo-

cated under the engine access cover on the left

side of the engine

.

Use cnly automatic transmission fluids identi-

fied with the mark DEXRON~° II

. These fluids

have been specially formulated and tested for

use in your automatic transmission, and are

available from your GMC MotorHome dealer or
local service station

.

Check the fluid level at each engine oil change

period

. To make an accurate fluid level check

1

. Drive vehicle several miles, making fre-

quent starts and stops, to bring transmission

up to normal operating temperature (approx

180-190°F.)

2

. Park vehicle on a level surface

3

. Apply parking brake

4

. Place selector lever in "PARK" and leave

engine running

5

. Open all windows, then remove engine

cover

.

.

.

.

.

.

Transmission

Dipstick

Dipstick

4

1

42

6.Remove dipstick and wipe clean
7

. Reinsert dipstick until cap seats

8

. Remove dipstick and note reading

If fluid level is at or below the "ADD" mark,

add sufficient fluid to raise the level to the

"FULL" mark
"ADD" to "FULL
the Maintenance Schedule folder for servicing
interval

.

. One pint raises the level from

." Do not overfill

.

.

.

. Refer to

TRANSMISSION

NOTE:Have a drain pan ready as lubricant

will begin to drain as bolts are loosened

1

. Remove (13) bottom pan attaching screws

2

. Remove bottom pan and discard gasket

3

. Remove and discard oil filter assembly

4 . Install new O-ring seal on new filter and

intake pipe and filter assembly and install

5

. Using a new pan gasket, install pan . Torque

attaching screws to 12 foot-pounds

6

. Add four (4) quarts of DEXRON® II
automatic transmission fluid and check fluid as
noted above

FINAL DRIVE

1

. Remove (10) cover attaching bolts
a drain pan ready as lubricant will begin to drain

as bolts are loosened

2

. Remove cover and allow lubricant to drain
Discard old gasket

3

. Using a new cover gasket, install cover
Torque attaching bolts to 24 foot-pounds
to be bent over breather hole

4

. Add four pints of recommended lubricant
through fill plug hole or fill until lubricant level
is at the plug hole

OIL

FILTER

.

FINAL

LUBRICANT

. Install fill plug

DRIVE

.

.

REPLACEMENT

.

REPLACEMENT

.

.

.

.
.
.

.

. Have

.

.

. Shield

Replacing Transmission Oil Filter

Final Drive Cover Removal

NOTE

:

Use SAE 80W or SAE 80W-90 GL-5

Gear Lubricant

operated in Canada, use SAE 80W GL-5 Gear

Lubricant

. (For those vehicles normally

.)

STEERING SYSTEM

POWER

Check the fluid level in the power steering

pump reservoir at each oil change period

requires the removal of the engine access cover

The reservoir is located near the Delcotron

STEERING

SYSTEM

. This

.

. Add

4

3

Checking Power Steering

Fluid Level

STEERING

LINKAGE

The steering linkage (tie rods) and suspen­sion should be lubricated, using a Lithium Soap
Multi-purpose grease that meets GM Specifica­tion 6031-M, at every oil change

. Seals should

be checked for damage (see Maintenance Sched-

ule folder)

.

BRAKE

MASTER CYLINDER

The master cylinder is located behind the

left-side access door on the front of the vehicle

The fluid level in the master cylinder should be

checked at each oil change
cylinder filler cap and unsnap the retainer

Checking Brake Master Cylinder

low fluid level in the front brake master cylinder
reservoir could be an indicator that the disc

GM Power Steering Fluid (if GM Power Steer-

ing Fluid is not available, DEXRON

®

II Auto-

matic Transmission Fluid may be used) as nec­essary to bring level into proper range on the
filler cap indicator depending on fluid tem­perature

.

If at operating temperature (approx

. 150° F

-hot to the touch) fluid should be between
"HOT" and "COLD" marks

ture (approx

. 70' F

.) fluid should be between

"ADD" and "COLD" marks
require periodic changing

. If at room tempera-

. The fluid does not

.

brake pads need replacing
be maintained at

reservoir with Delco Supreme No . 11 or DOT-3
Brake Fluid or equivalent
cap be sure to fasten the retainer securely, tak­ing care not to let dirt enter the reservoirs

BLEEDING

.

The need for bleeding brakes is generally indi-

cated by springy, spongy pedal action

bleeding equipment must be used and a definite

bleeding sequence and procedure must be fol­lowed

. Consult your GMC MotorHome dealer

BRAKE

BRAKES

SYSTEM

.

. Wipe off the brake

. A

. The fluid level must

1/4-inch below the top of each

. When replacing the

.

. Pressure

.

SERVICING

Coolant Recovery Tank

DETAILS

ENGINE

The recovery type cooling system is standard
on all vehicles covered by this manual
coolant expands with rising temperature and the

overflow is collected in the recovery tank
the system temperature drops, the coolant is
drawn back into the radiator
tem has been filled at the factory with a high-

quality, inhibited, year-around coolant that
meets the standards of General Motors Specifi-

cation 1899-M

freezing protection to -20°F (-35°F in Can­ada), and it has formulated to be used without
replacement for period specified in Maintenance
Schedule folder, providing the proper concentra-

tion of coolant is maintained

4 4

COOLING

SYSTEM

. The

. When

. The cooling sys-

. This coolant solution provides

.

~

~

Location of Radiator Cap

COOLING
Checking Coolant Level

SYSTEM CARE

swollen, checked or otherwise deteriorated

5

. Clean frontal area of radiator core

conditioning condenser

Open right front access cover . Do not

radiator cap to check coolant

level, but check

remove

Draining and Refilling

visually in the "see thru" coolant recovery tank
as frequently as necessary.Level should be at
the "COLD" mark on the recovery

the system is cold

; and at the "HOT"

tank when

mark at
normal operating temperature.Add a 50/50
mixture of high-quality

freeze and water to the recovery tank for
additions

. If frequent additions are required,

see your dealer for a cooling system

ethylene glycol anti-

coolant

check

.

The cooling system should be drained,

and refilled using the following
procedure at intervals specified

nance Schedule folder

1

. Remove radiator cap when engine is

•

Rotate cap slowly counterclockwise

(Do not press down while rotating)

•

Wait until residual pressure
hissing sound) is relieved,

NOTE

:

If recommended quality antifreeze

used, supplemental inhibitors or additives

ing to provide increased cooling

not necessary

. They may be detrimental

efficient operation of the system,

an unnecessary operating expense

Annual Service

capability are

and represent

.

The cooling system should be checked

year as follows

1

. Wash radiator cap and

clean water

2

. Check coolant for proper level

protection

3

. Test system and radiator cap
pressure holding capacity
use cap designed by AC for coolant
systems and specified for your vehicle

4

. Tighten hose clamps and inspect all
Replace hoses

:

filler neck with

.

and freeze

.

for proper

(9 psi)

. If required,

recovery

.

every 24 months,

earlier if

is

claim-

to the

each

hoses

.

on cap and continue to rotate counterclock­wise

To avoid the danger of being burned,
do not remove radiator cap while en-

gine and radiator are still hot because
scalding fluid and steam will be blown
out under pressure

2

. Run engine, with radiator

until upper radiator hose is hot
mostat is open)

3

. Stop engine and open radiator drain
to drain coolant
removing drain plugs in the block

4

. Close valve (install block
removed) and add sufficient water to

5

. Repeat steps 1, 2, 3, and

number of times until
nearly colorless

Radiator Drain Plug

.

and air

.

flushed

recommended

in the Mainte-

.

cool

:

to detent

.

(indicated by a

then press down

.

CAUTION

.

cap removed,

(indicates ther-

.

valve

. (Operation may be

speeded by

.)

drain plugs, if

fill system

.

4 a sufficient

the drained liquid

is

.

4 5

~

6.Allow

system

to

drain

then close radiator drain valve tightly
block drain plugs, if removed

completely

.)

and

. (Install

THERMOSTAT

trolled by a thermostat installed in the engine

. Remove recovery cap leaving hoses in

7

. Remove coolant recovery tank, empty

place
fluid, scrub and clean bottom and sides of tank

with detergent and water, flush well with clean
water, drain and reinstall

8

. Add sufficient ethylene glycol coolant,

.

coolant outlet to maintain a satisfactory operat-

ing temperature of the engine

is designed for continuous use through both
winter and summer and need not be changed
seasonally
Delco parts are recommended

meeting GM specification 1899-M, to provide
the required freezing and corrosion protection

-at least a 50 percent solution
radiator to the base of the radiator filler neck

(-20°).Fill

FUEL REQUIREMENTS

and bring level of coolant in the recovery tank
to the "FULL HOT" mark
tank cap

.

9

. Run engine, with radiator cap removed,

until radiator upper hose becomes hot

10 . With engine idling, add coolant to radia-

tor until level reaches bottom of filler neck
stall cap making certain arrows line up with
overflow tube

.

. Reinstall recovery

.

; in-

on unleaded gasoline of at least 91 Research
Octane

Octane of at least 83

mize spark plug fouling and emission control sys­tem deterioration

should be used only when needed to eliminate

knock, a metallic rapping noise generated dur-

ing the combustion process
require Premium grade fuel

would be an unnecessary additional expense

Owner Responsibility

It is the owner's responsibility to

•

Maintain cooling system freeze protection at

-20°F or below to ensure protection against

corrosion and loss of coolant from boiling,

knocking persists, consult your authorized dealer

Continuous or excessive knocking may result in

engine damage and constitutes misuse of the
engine for which the manufacturing division is

not responsible under terms of the new vehicle

warranty

even though freezing temperatures are not
expected

.

leaded gasoline ONLY and have provision for

•

Add ethylene glycol base coolant that meets

the prevention of use of leaded gasoline

GM Specification 1899-M when coolant ad­ditions are required because of coolant loss

or to provide additional protection against
freezing at temperatures lower than -20°F

(-35°F in Canada)

.

NOTE:Alcohol or methanol base coolants or
plain water are not recommended for your
vehicle at any time

.

symbol similar to the one below, use unleaded
gasoline with a symbol number of 2

regular grade gasoline (symbol number 3 )
should be used only when needed to eliminate
knock
oline octane quality in terms of the average of

R

esearch and Motor Octane

at left, use unleaded gasoline with a number of
at least 87

The cooling system is protected and con-

. This thermostat

. When replacement is necessary,

.

ENGINE FUEL SYSTEM

Your vehicle's engine is designed to operate

. The gasoline should also have a Motor

. This gasoline will mini-

. Regular grade leaded gasoline

. The engine does not

. Thereafter, its use

. If

.

.

NOTE

:

Some engines may be designed for un-

.

If the service station gasoline pump has a

. Leaded

. If the pump has a label indicating gas-

LR +

.

Ml

2

J

as shown

Gas

Pump Symbols

FUEL SYSTEM

The vehicle has two gasoline tanks of ap-

proximately 25 gallons each and a fuel switch-

ing device (see "FUEL SELECTOR" switch)
which allows the driver to switch from the main

tank (when empty) to the auxiliary tank

4

6

.

~

~

~

The

gasoline
cated
under the driver's window

GAS CAP-The cap is equipped with a double
set of locking tangs

To Remove

•

•

•

only a cap with the same features should be
used
in a serious malfunction of the system
replacement caps may be obtained from your

GMC MotorHome dealer

on the left side of the vehicle, directly

It is important that all pilot lights be
turned off and open flames kept away

when filling the fuel system to help re-

duce fire hazard

Rotate cap one-half turn counterclockwise to
clear the first set of tangs from the slots

inside the filler neck
residual pressure to escape

Pull the cap outward and rotate one-quarter
turn counterclockwise to clear second set of

tangs

. Then remove the cap

To install, reverse this procedure

NOTE:If the gas cap requires a replacement,

. Failure to use the correct cap can result

fuel

CAUTION

.

.

compartment

filler

.

. This will allow any

.

.

.

. Correct

.

is

lo-

Gasoline Fuel Filler Compartment

CARBURETOR

To obtain maximum engine performance and

fuel economy, carburetor idle speeds should be
checked as recommended in the Maintenance

Schedule folder
fast or slow, or idles roughly, the following ad­justments should be performed
above symptoms persist it is recommended the
vehicle be taken to a GMC MotorHome dealer

NOTE:Refer to Tune-up label on engine for

correct specifications

Fuel Filter

To replace carburetor filter, disconnect fuel
line, remove filter nut, gasket, filter, and spring
Install spring and element (open end of filter
facing toward filter nut)
nut to 18 foot-pounds torque

IMPORTANT
beyond specified torque can damage

nylon gasket

. If the engine stalls, idles too

. However, if the

.

.

.

. Install gasket ; tighten

.

: Tightening fuel inlet nut

.

Removing Engine Air Cleaner Element

Fuel Filter Components

4

7

AIR

ENGINE

The air cleaner is a disposable type element

Replace the element as specified in the Mainte-

nance Schedule folder

with air hose

frequent service under dusty conditions
GMC MotorHome dealer can advise you on the

proper interval
an AC ACron air filter element is recommended

CLEANER

nals, and battery hold-down brackets clean

.

They should be cleaned every 12,000 miles or

. Do not wash, oil, or clean

. The air cleaner will require more

. Your

. When replacement is necessary,

once a year
ammonia and water or baking soda and water

Flush off with clear water
petroleum jelly or petrolatum to battery cable
terminals to help retard corrosion

.

able see your dealer

CAUTION

DO NOT remove the engine air cleaner

gizer is recommended at replacement time

unless temporary removal is necessary

during repair or maintenance of the ve-

. When the air cleaner is removed,

hicle
backfiring can cause fire in the engine

compartment

CHASSIS

.

ELECTRICAL SYSTEM

BATTERIES

There are two Delco Energizer Batteries used

for the chassis and interior of the vehicle
are located behind the right front access door

It is important that these batteries receive

the following care

. Check the fluid level in each cell at each

1

engine oil change interval and more often in hot

weather

small hand mirror
drinking water or distilled water to bring the
level to the split-ring in the filler
NOT OVERFILL

. (To do this it may be helpful to use a

:

.) Add only colorless, odorless

.

. These

o

pening . D

.

O

2

. Keep your batteries, battery cable termi-

.

. Use a brush and a solution of

.

. After cleaning apply

.

3

. If battery performance becomes question-

.

For full voltage requirements a Delco Ener-

.

CAUTION

Never expose battery to open flame or
electric spark-chemical action in the bat­tery generates hydrogen gas which is

flammable and explosive

. Do not allow

battery fluid to contact eyes, skin, fab­rics, or painted surfaces-fluid is a cor­rosive sulfuric acid solution which could
cause serious personal injury or property

damage

. FLUSH ANY CONTACTED AREA

WITH WATER IMMEDIATELY AND THOR=
OUGHLY
WORKING ON OR NEAR BATTERY

. WEAR EYE PROTECTION WHEN

. Re-

move rings, metal watchbands and other
metal jewelry before working on
around a battery
metal tools and equipment

. Be careful in using

. If such

or

metals should contact the positive battery

terminal (or metal in contact with it) and
any other metal on the vehicle, a short

circuit may occur which could cause
sonal injury

. Batteries and battery acid

per-

should always be kept out of the reach
of children

.

Headlight

Replacement

For "Battery Jump Starting Procedure" see

IN CASE OF EMERGENCY section

.

DISTRIBUTOR

Distributor maintenance, which is the owner's

responsibility, includes regular examination of

the distributor cap for cracks, checking condition

of ignition wires, maintaining serviceable dis­tributor points, and proper ignition timing at
specified intervals

Schedule folder for additional information

: Refer to Tune-up label on engine for

NOTE

correct specifications

4

8

. Refer to the Maintenance

.

.

SPARK

is explained in the Maintenance Schedule folder
Servicing is the owner's responsibility
removing plugs, clean plug wells thoroughly,

clean the threads and seats in the cylinder heads
to assure proper seating and heat transfer

HEADLIGHTS

regular part of your "Safety Maintenance" pro­gram

are equipped with ground guide points for the

use of a mechanical aiming device

ized dealer is best qualified to adjust your head­lights

Headlight Beam Adjustment

cess to adjustment screws

top adjusting screw provides vertical adjustment
and the side adjusting screw provides horizontal

adjustment
adjusted after replacing Sealed-Beam unit, pro-

viding headlights were in proper adjustment
before replacement and adjusting screws were

not disturbed during replacement

PLUGS

The frequency of spark plug service intervals

.

. Before

.

Make a headlight beam adjustment check a

. Sealed-Beam units are No

.

NOTE

:

Cutouts in headlight bezel permit ac-

.

Headlights should be adjusted properly

. Headlights should not have to be

. 6014 which

. Your author-

. The

.

combination of fuses, circuit breakers, and fusi­ble thermal links in the wiring itself

to reduce the hazard of electrically-caused fires
in the vehicle

behind an access cover in the glove compart­ment
or circuit breakers located here except

The fuse and circuit breaker block is located

Chassis

.

. All chassis circuits are protected by fuses

Fuse

Block

. This helps

:

Headlight Replacement

To replace a Sealed-Beam unit, remove bezel
Then disengage the tension spring using a stiff
hooked tool

slightly to disengage mounting ring slots from
groove of each adjusting screw, then pull for-

ward

. Disconnect wiring at the base of unit and
separate the Sealed-Beam assembly by remov­ing the two retaining screws
Beam unit in reverse order of removal

EXTERIOR LIGHTS

All exterior lights can be easily replaced by
removing lens, pushing bulb in slightly and turn­ing counterclockwise, except side marker lights
which are simply pressed in
bulb, reverse procedure

CHASSIS FUSES, FUSIBLE LINKS,
CIRCUIT BREAKERS

The wiring circuits in your vehicle are de-

signed to be protected from short circuits by a

. Rotate the Sealed-Beam assembly

. Install Sealed-

.

. Then, with new

.

•

HEATER BLOWER-Which has a 30-amp

.

in-line fuse located behind the right access
door near the heater blower motor

•

HEADLAMP CIRCUITS-Are protected by
a circuit breaker in the main light switch
electrical overload in the light circuit will
cause the lights to go on and off or in some
cases to remain off

have the wiring circuits checked immediately

Circuit breakers of remote reset type can be
reset only after turning the affected circuit con­trol switch "OFF" for approximately 40 seconds,
or by removing the breaker from clips for this
period of time

.

. An

. If this condition develops,

.

CAUTION

Do not touch body of any installed
breaker of this type with bare hands
circuit should happen to be shorted or

overloaded-the breaker body could be
hot and cause a burn

.

; if

.

4 9

~

~

A replaceable fuse link is located at the bat­tery pickup junction block behind the right
access door

. If an overload should occur, this link
is designed to fail (open circuit) preventing dam­age to the main wiring harness

. Another link

of the same wire gauge and length must be in­stalled in its place in the event of failures

.

Tire Care

Tires should be checked regularly for proper

inflation pressure, wear, and damage

ing information will assist you in properly caring

for your tires

Inflation Pressure

IMPORTANT
breaker, make sure replacement is of same num-

ber as marked on block

When replacing fuse or circuit

:

.

Tire inflation pressures listed on the tire
placard have been selected to provide the best
tire life, riding comfort and handling stability for
normal driving conditions

TURN

SIGNAL

WARNING

The turn signals and the hazard warning
system both operate with the same flasher
flasher is clipped behind the dashboard just to
the right of the steering column

AND

FLASHER

HAZARD

The use of improper tire inflation pressures
can adversely affect tire life and vehicle perfor­mance

. This

.

sive tire heat, abnormal tire wear, adverse vehicle
handling and reduced fuel economy

air pressure can result in abnormal tire wear,
adverse vehicle ride and handling, and increased
susceptibility to damage by road impacts

Tire pressures should be checked at least once

WHEELS AND TIRES

TIRES

a month (and preferably oftener) or before long
trips or when heavily loaded
points should be observed when checking and

The factory installed tires on your vehicle are

setting tire pressures

designed to provide the best all-around perfor-

1

mance for normal vehicle operation . When in-

flated as recommended on the "Tire Pressure

Placard," located on the glove compartment door

of your vehicle, the tires have the load carrying
capacity to operate satisfactorily at all normal
highway speeds

.

. Cold tire pressure ratings are applicable
when a vehicle has been inoperative for 3 hours,
or more, or driven less than one mile

2

. Tire inflation pressure may increase as
much as 6 psi when hot (after vehicle has been
driven 10 miles or at speeds of more than 60

MPH)
tires are hot from driving

. The follow-

.

.

. Too little air pressure can result in exces-

. Too much

.

. The following

.

.

. Do not "bleed" or reduce pressures when

.

GMC MOTOR HOME

TIRE PRESSURES

.75-16

.5 LOAD RANGE D

FOR

PSI COLD

NOTE

REAR

60

8

FOR LOADS UP TO VEHICLE CAPACITY

FRONT

60

FOR SUSTAINED SPEEDS IN

EXCESS OF 65 MPH INCREASE TIRE

PRESSURES 10 PSI COLD

TORQUE WHEEL NUTS TO

250 POUND-FEET AT 500 MILES

AFTER EACH WHEEL REMOVAL

Tire Pressure Placard

3

. For continuous high speed operation (over

65 MPH), increase tire inflation pressure to 70
psi

.

4

. Always use a tire pressure gauge when

checking tire pressure

.

Tire Damage and Repair

Tires with cuts, splits or cracks deep enough

to expose the fabric, should be removed from

service
and the tire should be removed

. Bulges usually indicate internal damage,

. Tires with ques-

tionable damage should be removed from the
wheel and examined by an expert

.

If an air loss occurs while driving, do not at­tempt to drive on the deflated tire more than is
necessary to stop safely
distance can damage a tire beyond repair

5

0

. Driving even a short

.

Temporary repairs, such as "blowout" patches

or any repair made from the outside of the tire

should not be made except in emergencies
"stop-gap" devices as plugs and aerosol-type
sealants are good for not more than 100 miles of

driving at speeds not over 50 MPH
nent vulcanized repair, plug or patch applied
from inside the tire, should be made as soon as
possible
in a damaged tubeless tire is not a recommended
repair procedure

. Also, the installation of an inner tube

.

. Such

. A perma-

versely affect wheel and wheel bearing life,

brake cooling and stopping ability, headlamp
aim, speedometer-odometer accuracy, bumper
height, vehicle ground clearance and tire clear­ance to the body and chassis

mended
under other severe operating conditions for ex-

tended periods, the wheel's life may have been

greatly shortened

Use of any other size or type wheel may ad-

.

The use of used wheels is also not recom-

; if they have been run overloaded or

.

Replacement Tires

When replacing tires, only the size (8

16

.5), load range
ply polyester cord, or bias-ply steel belted) are
recommended for installation on the vehicle

Radial tires are not recommended for
installationonthe

damage
result

.

Use of any other tire may seriously affect ride,
handling, speedometer/odometer calibration, ve-

hicle ground clearance and tire clearance to the
body and chassis

considered when replacing tires

•

To achieve best all-around vehicle perform­ance, bias-ply and bias-ply steel belted tires
should not be mixed on the same vehicle

•

It is recommended that new tires be installed
in pairs opposite each other (preferably the
front wheels)

•

When replacing only one tire, it should be

paired with the tire having the least wear, to
equalize braking traction

("D"), construction type (bias-

CAUTION

vehicle

and

possible injury

. The following also should be

.

.

Severe

.

.75-

.

could

.

Tire Warranty

Tires are warranted by the tire manufacturers

as covered in the New Vehicle Warranty folder

Tire Traction

A decrease in driving, cornering, and braking
traction occurs when water, snow, ice, gravel, or
other material is on the road surface
practices and vehicle speed should be adjusted to
the road conditions

When driving on wet or slushy roads, it is
possible for a wedge of water to build up be­tween the tire and road surface

non, known as hydroplaning, may cause partial
or complete loss of traction, which adversely
affects vehicle control and stopping ability
reduce the possibility of traction loss, the follow­ing precautions should be observed

1

roads are slushy

2

puddles

3

are visible

4

.

. Driving

.

. This phenome-

. To

:

. Slow down during rain-storms or when

.

. Slow down if road has standing water or

.

. Replace tires when tread wear indicators

.

. Keep tires properly inflated

.

Replacement Wheels

Wheels must be replaced if they become bent,
are heavily rusted, if the lug nuts won't stay
tight, or if they leak air
wheels or using inner tubes in leaking wheels

are not recommended repair procedures

When replacing wheels for any reason, care
should be taken to insure that the wheels are
equivalent to those removed in load capacity,
diameter, rim width, and offset
ment wheels can be obtained from your GMC

MotorHome dealer

.

. Straightening bent

.

. Correct replace-

Snow Tires

or snowy driving conditions it is recommended
that front driving wheels be equipped with mud

and snow type tires

tires, they should be of the same size, load range,
and construction as original equipment tires
is recommended that vehicle speeds be limited
to a maximum of 75 mph if mud and snow tires
are installed

5

1

If the vehicle is expected to encounter muddy

.

If you equip your vehicle with mud and snow

. It

.

TREAD

STILL GOOD

TREAD

WORN OUT

Tire Tread Wear

Tire Wear and Rotation

Uneven or abnormal tire wear is usually the

result of incorrect inflation pressure, improper
wheel alignment, wheels being out-of-balance, or

poor driving habits
tion, incorrect toe or camber and fast cornering

produce different types of abnormal wear which

can be diagnosed by your dealer

To

equalize wear it is recommended that the

tires be rotated every 6,000 miles (or sooner if

irregular wear develops) as shown

NOTE

:

It is recommended that disc brake
pads be inspected for wear whenever tires are
rotated

built-in tread wear indicators to assist you in
determining when your tires have worn to the

.

The original equipment tires

. Under-inflation, over-infla-

Indicator

.

.

incorporate

point of needing replacement

appear as

depth is1/16-inch or less
appear in two or more adjacent grooves, tire re-

placement due to tread wear is recommended

Tightening Wheel Stud Nuts

been replaced, it is the owner's responsibility to

check wheel stud nuts at 500 miles and after

every wheel removal thereafter
tightened to 250 foot-pounds torque in sequence

shown

Wheel Stud

1/2-inch wide bands when tire tread

When the vehicle is new or after wheels have

.

Tightening

Sequence

. These indicators

. When the indicators

. Nuts should be

.

Tire

Rotation

Diagram

CAUTION

If any wheel experiences a single stud

failure caused byaloose-running wheel,

all wheel studs should be replaced

A loose-running wheel may cause
only one stud to break, but several more
studs may become fatigued to the point

of failure, but not actually breaking

Replacing only the broken stud and re­mounting wheel will then set the stage
forasecond and possibly more serious

failure

come elongated or enlarged, replace

wheel

5

2

. If holes in the wheel have be-

.

.

.

Tighten wheel stud nuts as follows

1

. Install all nuts loosely, then finger-tighten

only the nuts marked by arrows

2

. Tighten all nuts to specified torque in se-

quence illustrated

studs or nuts

See IN CASE OF EMERGENCY section for

procedure used to change tire

. Never use oil or grease on

.

.

:

.

FRONT

ing is not required
sealed bearing and non-adjustable

REAR

quired as indicated in Maintenance Schedule
folder
repacked with Lithium Soap Multi-Purpose

Grease Meeting GM Specification 6031-M or
equivalent

with the wheel off the floor, and rotating the
wheel while tightening nut

the torque readings as follows

to 25-30 foot-pounds with wheel rotating to en-

sure that all parts are properly seated and
threads are free

finger-tight

tight position, back off one slot, then secure with
cotter pin

at this interval the rear suspension control arms
should be lubricated
the fittings between the rear wheels

WHEEL

Periodic maintenance on the front wheel bear-

WHEEL

A periodic rear wheel bearing repack is re-

. These bearings should be cleaned and

.

The adjustment of the bearing must be done

1

. Tighten adjusting nut with a torque wrench

2

. Back off nut one-half turn

3

. If unable to install cotter pin at finger-

.

4

. End play should be

.

BEARING

. The front wheel bearing is a

.

BEARING

.

ADJUSTMENT

. At this time make

:

. Re-tighten nut

.001" to

. This is accomplished at

.005"

.

. Also

stabilizer bar, shock absorbers and a right and
left torsion bar
nents are designed to provide satisfactory serv-

ice, ride, and handling if not overloaded and ad­justed to specified vehicle front end ride height

normally required
mation given earlier in this section for intervals
and lubrication points

lower control arm

is mounted into an adjustable arm

ride height is controlled by this adjustment

slightly to achieve ride height and drive unit a
few blocks so as to overcome delaying action

Location-Front Ride Height Adjustment

The front suspension consists of control arms,

No maintenance other than lubrication is

The front of the torsion bar is attached to the

The simplest way to adjust is to move arm

FRONT

SUSPENSION

. The front suspension compo-

. Refer to lubrication infor-

.

. The rear of the torsion bar

. The front

.

.

.

Checking

Vehicle Ride Height

3

5

inflation should be checked prior to making any
ride height adjustments

justed for variations in load distribution
ment is made at the adjustment nut on the
height control valve arm

MAINTENANCE

to remove moisture

the air filter washed with soap and water solu­tion or replaced
intervals specified in Maintenance Schedule
folder

Location-Rear Ride Height Adjustment

NOTE

:

Ride height is measured from top of

elongated slot in frame rail to ground level
inflation should be checked prior to making any
ride height adjustment

.

. Tire

they are caked with accumulated mud deposits
If deposits are present remove them from air

bellows

.

The rear suspension can be manually ad-

. Adjust-

.

1

. Drain air reservoir under front of vehicle

.

2 . The air compressor must periodically have

. Filter should be serviced at

.

NOTE

:

Occasionally check air bellows to see if

.

.

UNDERBODYMAINTENANCE

Ride height should be adjusted by raising
vehicle to relieve strain on adjusting bolt
cate adjusting bolt with chassis grease
ment is made by repositioning adjusting bolt

to wind-up and unwind torsion bar
ride height is changed, be sure to check front

end alignment and readjust if necessary

NOTE

:

Overloading and incorrect ride height
can create serious problems and shorten the
service life of the vehicle

sion ride height to specifications shown

REAR

The rear suspension consists of control arms,
mounting brackets, air bellows, shock absorbers,
air compressor, air reserve tank, and height con­trol valves
as load varies, and is designed to maintain a

constant frame height

NOTE

elongated slot in frame rail to ground level

. The system operates automatically

:

Ride height is measured from top of

. Adjust front suspen-

SUSPENSION

.

. Lubri-

. Adjust-

. Whenever

.

.

. Tire

The effects of salt and other corrosive mate-

rials used for ice and snow removal and dust
control can result in accelerated rusting and

deterioration of underbody components such as
brake and fuel lines, frame, exhaust system,
brackets, parking brake cables
effects, however, can be reduced by periodic
flushing of the underbody with plain water

geographic areas having a heavy concentration
of such corrosive materials, it is recommended
that the complete underbody be inspected and
flushed at least once each year, preferably after
a winter's exposure

be given to cleaning out underbody members
where dirt and other foreign materials may have
collected

If desired, your MotorHome dealer can per­form this service for you
provide recommendations on undercoating mate­rials which will help protect your vehicle from

corrosion

ANCE CARE section

. These corrosive

. In

. Particular attention should

.

. In addition, he can

. (See "Undercoating" in APPEAR-

.)

5

4

~

SPECIFICATIONS, OWNER ASSISTANCE,

INDEX, GAS STATION INFORMATION

VEHICLE

(TYPICAL

SERIES

IDENTIFICATION

In order that your vehicle may be specifically

identified as to manufacturer, engine type, year
designator, etc

IDENTIFICATION

MODEL DESIGNATION

Model Code

33
36

MFD.

B

Y

GMC

., refer to chart below

NUMBER TZE335V100053)

Length

23'

26'

YEAR

DESIGNATOR

NUMBER

.

SEQUENTIAL

NUMBER

100053

ASSY

.

PLANT

CODE

ENGINE

TYPE

E-V8 Gasoline

VEHICLE

Track

~

Wheelbase

Length (Including optional spare tire)

Width
Height

Interior Ceiling Height

~

~

~

~

DIMENSIONS

~

5

5

V-Pontiac

Front-75

Rear-82
23' Model
26' Model

23' Model....

26' Model

~

~

. ...

.28 in
.12 in
140 in
160 in

23 ft
26 ft

8 ft

.

.
.
.

.-9 in

.

. -9 in

.

96 in
.-1 in

.

76 in

.

.

CAPACITIES

Fuel System
Cooling System
Engine Oil
Turbo Hydramatic

Final Drive (Differential)
Power Steering Pump

Power Steering System

~

~

~

~

~

~

~

Two, 25 Gal

5 Qts

. (Including Filter 6

Drain & Refill4Qts

After Complete Overhaul12Qts

. Tanks

21

Qts

Qts.)

4 Pts

1

/a Qt

1 1

/z Qt

.
.

.
.
.

.

ENGINE*

Displacement

Carburetor
Compression Ratio

Bore

~
Stroke
Firing Order

Breaker Point Ignition System

High Energy Ignition System

~

Spark Plugs
Spark Plug Gap

Dwell

Spark Plugs
Spark Plug Gap

Dwell

* See Tune-up label on engine for additional specifications

~

~

~

~

~

~

~

~

~

~

1-8-4-3-6-5-7-2

.

455 cu

AC

. in

.

4 Barrel

8.5: 1

.125 in

4
4

.250 in

AC R45S

0

.040 in

R46SX

0

.080 in

Electronic

.
.

.

30°

.

BATTERIES

Type

Main (Automotive) Bat
Auxiliary Bat

~

E5000 R91 Rated 3350 Watts @ 0°F

~

E5000 R91

E5000 R91

.

MISCELLANEOUS

Radiator Cap (pressure opening)

Thermostat

~

TIRE

SEE "Wheels and Tires" in the SERVICE AND MAINTENANCE sec­tion of this manual and the tire placard on the glove box door

~

INFORMATION

9 PSI

AC Type RC32

1950F

.

.

FILTER RECOMMENDATIONS

Engine Air Cleaner
Engine Oil

Transmission Oil

~

~

~

AC Type A212CW

AC Type PF30

AC Type PF 160

5

6

FILTER RECOMMENDATIONS (Con't)

Engine Fuel
PCV Valve

Carbon Canister

~

~

~

AC Type GF441

AC Type CV697C

GM Part 7026014

FRONT END ALIGNMENT

Caster (Degrees) *
Camber (Degrees)**

Toe-In (Inches)

*L.H. and R

* *L

.H

. camber must be more positive (+) than R

~

~

~

.H

. must be within

1

/z °

+-2 °:±-1/20

R

. H

.+-

1/20±1/40

L

. H.+3/4

.

.H

. camber

.

± 1/4

0

0 --L1/s

0

VEHICLE FUSES AND CIRCUIT BREAKERS

The following fuses are located in the fuse block behind the glove box
in the dash
fied below-or property damage may result

. Do not use fuses of higher amperage rating than those speci-

.

Name on

Usage

Fuse Block

Fuse Type

Auxiliary Battery Switch,
Radio,
Tape Player

Heater Controls,
Air Conditioner

Side Marker Lights,
I

.D

. & Clearance Lights,
Tail Lights,
Dome Lights,
License Light

Stop Lights,
Hazard Warning Lights,
Turn Signal Lights

Windshield Washers

Cigar-Cigarette Lighter
Cruise Control,

Back-up Lights

Transmission Control,
Parking Brake Light,
Gauges

Instrument Lamps

Warning
Tell-Tale Lights

Aux

. Bat.-

Htr.-

Tail-Dome

Dir

. Sig

Washer
Mr

.

Cruise-B/U Lps

Gauges-Trans

Inst

. Lps

Tell-Tales

A / C

. -

Haz

.

Radio

. & Stop

.

AGC-10

AGC-2 5

SFE-20A

SFE-20A

AGC-10
SFE-20A

.

SFE-20A

SFE-10A

SFE-4A

AGC-10

5

7

VEHICLE FUSES AND CIRCUIT BREAKERS (Con't)

The following circuits employ circuit breakers or have fuses located as
indicated

Headlight Circuit Breaker

Heater Blower AGA 30

Warning & Signal Flasher GM No

Vehicle Trouble Light AGC-10

Air Suspension Compressor 30A Circuit Breaker

~

~

. 673499....

~

Built Into Light Switch

Built Into Line At

Right Access Door Near

Instrument Panel

In Line, Behind

Access Door, Near Light

~

LIGHT BULB SPECIFICATIONS

(INSTRUMENT PANEL)

Usage

Brake System Tell Tale
Generator Tell Tale

Park Brake Tell Tale
Cruise Control Tell Tale
Door Ajar Tell Tale
Low Fuel Tell Tale
Low Air Tell Tale
Power Level Tell Tale
High Beam Indicator

Turn Signal Indicator
Instrument Cluster Lights 2
Speedo Cluster Lights

Dome Lights
Radio Dial (AM/FM/Stereo/Tape)

Radio Dial (Exc
Heater Control

. AM/FM/Stereo/Tape)

Quantity

1
1
1
1
1
1

1
2
1

2

2
2
1
1
1

Heater Blower

In Clip Behind

In Fuse Block

Bulb

. No

161
161

74

74

74
74

74

74
161
168
194

194
211
566

1893

1895

.

LIGHT BULB SPECIFICATIONS

Usage

Clearance and I.D.
License

Side Markers-Front
Side Markers-Rear

Back-Up Lights

Parking and Turn Signals
Stop and Tail
Headlights

(EXTERIOR)

5

8

Quantity

10 67

1
2

2
2
2
2

2

Bulb N

67

194

194

1156
1157
1157
6014

~

~

~

~

~

OWNER

The satisfaction and goodwill of the owners of GMC Truck & Coach

products are of primary concern to your dealer and the GMC Truck &
Coach Division

sales transaction or the operation of your vehicle will be handled by your

dealer's Sales or Service Departments

despite the best intentions of everyone concerned, misunderstandings will

sometimes occur
satisfaction through normal channels, we suggest that you take the follow-

ing steps

STEP ONE-Discuss your problem with a member of dealership manage-

ment

. Frequently, complaints are the result of a breakdown in communica-

tions and can quickly be resolved by a member of the dealership manage­ment

. If the problem already has been reviewed with the Sales Manager

or Service Manager, contact the Dealer himself or the General Manager

STEP TWO-Contact the GMC Truck & Coach Division Zone Office

closest to you listed on page 61 (or in Canada contact the General Motors

Zone Office)

solved by the service outlet without additional assistance, the matter
should be called to the attention of the Zone's Customer Services Depart­ment and the following information provided

. Normally, any problems that arise in connection with the

. If you have a problem that has not been handled to your

:

. When it appears that your problem cannot be readily re-

ASSISTANCE

. It is recognized, however, that

.

:

•

Your name, address, telephone number

•

Vehicle Identification Number*

•

Dealer's name and location

•

Vehicle's delivery date and mileage

•

Nature of problem

STEP THREE-Contact the Customer Services Manager, GMC truck &
Coach'Division, 660 South Blvd

313-857-4547) or in Canada, contact the Owner Relations Supervisor,
General Motors of Canada Limited, Oshawa, Ontario (phone 416-644-

6624)

. If after an additional review of all facts involved he feels that some
further action can be taken, he will so instruct the Zone
letter will be acknowledged providing GMC Truck & Coach Division's

position in the matter

When contacting the Zone or Home Office, please bear in mind that

ultimately your problem likely will be resolved in the dealership utilizing
the dealer's facilities, equipment and personnel

that you follow the above steps in sequence when pursuing a problem

Your purchase of a GMC Truck & Coach product is greatly appreciated

by both your dealer and GMC Truck & Coach Division
desire to assist you in any way possible to assure your complete satisfaction

with your vehicle

.

.

. East, Pontiac, Michigan 48053 (phone

. In any case, your

. It is suggested, therefore,

.

. It is our sincere

*Available from vehicle registration, title

5 9

or vehicle identification plate

.

U.S. ZONE TERRITORIES

6

0

U.S. ZONE OFFICES

When calling for assistance, please ask for Customer

ATLANTA

5373 Peachtree Industrial Blvd
Chamblee, Georgia 30341

455-5564
Area Code 404

BOSTON

20 Cross St

Woburn, Mass

935-6858

Area Code 617

CHARLOTTE

1914 W

P.O. Box 8149
Freedom Station

Charlotte, N
332-4181-82-83
Area Code 704

CHICAGO

2021 Spring Rd
Oakbrook, Ill

654-6465

Area Code 312

CINCINNATI

8075 Reading Road

Carrousel Towers

Cincinnati, Ohio 45237
841-5856
Area Code 513

DALLAS

6007 Peeler Street
P.O. Box 35187
Airlawn Station
Dallas, Texas 75235

358-5316
Area Code 214

.

. 01801

. Morehead

. 28208

. C

.

. 60521

DENVER

.

4715 Colorado Blvd
Denver, Colo

388-1611
Area Code 303

DETROIT

600 S
P.O. Box 456
Pontiac, Mich . 48053

857-4686

Area Code 313

KANSAS CITY

3100 Fiberglass Road

Kansas City, Kans

281-6063

Area Code 913

LOS ANGELES

8155 Van Nuys Blvd

Suite 1030 Panorama Towers

Panorama City, Calif

873-7554

Area Code 213

MEMPHIS

3495 Lamar
Box 18714
Holiday City Sta
Memphis, Tenn
365-9210
Area Code 901

MINNEAPOLIS

3001 Broadway N.E.
Minneapolis, Minn

331-4282

Area Code 612

NEW YORK

780 Dowd Avenue

Elizabeth, N.J. 07207

354-8200
Area Code 201

. 80216

. Saginaw

Ave

1

4

.

. 66115

.

. 91402

.

.

. 38118

. 55413

Services Manager

OAKLAND

10626 E
Oakland, Calif
568-6929
Area Code 415

PITTSBURGH

Russelton Road
Cheswick, Pa . 15024

274-8000
Area Code 412

PORTLAND

5355 S

Beaverton, Ore

646-8333

Area Code 503

ST

. LOUIS

Suite 320

Crestwood Executive Center

St

. Louis, Mo
849-0990
Area Code 314

WASHINGTON

Suite 410-Profess

1109 Spring St

Silver Spring, Md

659-3166

Area Code 202

HAWAII (HONOLULU)

1600 Kapiolani Blvd

Suite 714
946-3988

Honolulu, Hawaii 96814
Area Code 808

. 14th Street

. 94603

. Western Avenue

.W

. 97005

. 63126

. Bldg

.

. 20910

.

.

Note

: The

of Alaska is serviced by the Portland Zone

State

MEXICO ZONE OFFICE

General Motors de Mexico S

.A

. de C.V. Av

Phone No

6

. Ejercito Nacional No

. 545-3921

1

. 843 Mexico 5, D

.

.F

.

~

~

~

~

GM OF CANADA LIMITED-ZONE OFFICES

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SODDEN

Need
hicle service and maintenance questions
answers to parts requirement questions...an­swers to recommended commercial vehicle speci­fications questions? Now GMC offers you direct­to-factory communication

Monday through Friday between 8
and 5 :00 P.M. (EST) and talk with qualified
commercial vehicle personnel

answers

to

Commercial TransMode Ve-

. You can dial toll free

:15 A

.

. . .

.M

.

SERVICE

800-521-2800

SYSTEM

(FOR OWNERS)

In Michigan call

AFTER-HOUR

INFORMATION SERVICE

If you have attempted to contact a GMC MotorHome dealer after
normal business hours, without success, you may call the toll-free number
below

. The operator who will answer has a list of private numbers through
which many dealers can be reached after hours and will give you the
number and location of the nearest one

800-521-2806

.

: 800-572-7953

I

InMichigan call

It should be understood, however, that any charges for after-hours
service assistance must be borne by the owner
the repair qualifies under our published warranty, the dealership charge

for additional services, such as for, after normal business hour repairs will
be the owner's expense

.

: 800-572-7959

. In those instances where

MAINTENANCE MANUAL AND

PARTS BOOK

Maintenance Manual and/or Parts Book can be purchased through any

GMC MotorHome dealer

.

6

3

IMPORTANT

FACTS YOU SHOULD KNOW

ABOUT GASOLINE MILEAGE AND HOW TO IMPROVE

IT

How you drive, where you drive, and when

you drive all have an effect on how many miles
you can get from a gallon of gasoline
ful attention you give your vehicle as far as
maintenance and repairs are concerned will also
contribute importantly to fuel economy

FUEL

SELECTION

Use an unleaded gasoline of at least 91 Re-

search Octane-Symbol Number 2

details on Fuel Requirements are given in the

SERVICE AND MAINTENANCE section

"JACKRABBIT"

Gasoline can be conserved (and engine and
tire life prolonged) by avoiding unnecessarily
rapid acceleration away from lights and stop

signs

.

STOP-AND

Frequent stops and starts during a trip really

cut down on your miles per gallon
your short trips to take advantage of through
streets to avoid traffic lights
like the professional drivers to avoid unneces-

sary stops

EXCESSIVE

An idling engine uses gasoline, too
faced with more than a few minutes wait and
you're not in traffic, it may be better to "turn off"
and start again later

.

STARTS

START

IDLING

DRIVING

. Pace your driving

.

. The care-

.

. Additional

.

. Plan even

. If you're

LUBRICANTS

A properly lubricated vehicle means less
friction between moving parts
manual and the maintenance schedule for the

proper lubricants to use and the lubrication
intervals

AIR

CLEANER

Your vehicle receives its power from a mix-

ture of gasoline and air

the system through the air cleaner so it's impor-

tant to replace the air cleaner at required inter­vals

. A dirty air cleaner reduces engine efficiency

PROPERLY

Overall tuning (a check on timing, distributor

points, spark plugs, emission control devices,

.) can improve your vehicle's gas mileage

etc
You just can't expect an "out-of-tune" engine

to give you good gas mileage and cleaner air

EXCESS

Fuel economy is related to the work the en­gine must do
power it takes . Keep excess weight to a mini­mum by removing any personal effects or lug-

gage from the vehicle when they are not needed

TIRE

INFATION

Underinflation not only causes needless wear

of the tires, but can also waste gasoline
good idea to check tire pressures regularly

. Consult this

.

. The air is taken into

TUNED

WEIGHT

. The heavier the load, the more

ENGINE

.

.

.

.

. It's a

.

SUDDEN

Sudden stops themselves don't waste gasoline,
but energy is wasted as heat in braking
in the form of gasoline is also needed to acceler-

ate back to driving speed

STOPS

WHEEL

. Energy

.

"Toe in" or "toe out" has the effect of drag-

ging your front tires sideways and causes prema-

ture tire wear

load and that takes gas from your tanks

64

ALIGNMENT

. It takes power to carry this extra

.

~

~

INDEX

SUBJECT

PAGE

A

Absorbers, Shock
Accessory Position, Ignition Switch
After-Hour Information Service
Air Circulation

Air Cleaner
Air Compressor
Air Conditioning

Automotive
Air Suspension
Alignment, Wheel
Antenna

Anti-theft Steering Column Lock
Appearance Care
Automatic Transmission

Auxiliary Battery

Auxiliary Fuel Tank
Axle, Final Drive

~

Fluid Check

Maintenance
Operation

Starter Safety Switch

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

48, 56, 64

~

B

Batteries

Emergency Starting

Fluid Level

Gas Caution

Location
Battery Boost Switch

Bearings, Rear Wheel
Before Driving

Belts, Lap
Blower, Ventilating
Body Identification Number

Brakes

Break-In Period

Bright Metal Cleaning
Bulbs and Fuses

~

Linings

Master Cylinder Level

Parking Brake

Power

Self-Adjusting

Trailer

Warning Light

New Vehicle

Vehicle Pulling Trailer

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

NO

53,54

11
63

21-23

54

22
54
57

24
11

32

41

41,43

12

11

21,56

20

43

27

48
48
48

21

53

5

7,32

21, 22

55

16

44

16
15
16

9

19

9

8

34

57,

57,58

.

SUBJECT

C

Cap, Filler

Engine Oil
Gasoline

Power Steering Reservoir
Radiator

Capacities
Carbon Monoxide Caution

Carburetor, Engine
Changing Wheels & Tires
Charging System Indicator Light
Chassis Lubrication
Check List
Child Restraints

Chrome Protection
Cigar Lighter
Circuit Breaker, Headlights

Circuit Breaker
Cleaning

Exterior Finish and Trim
Fabric and Interior Trim
Spot Removal

Cold Weather Starting
Compartment

Engine
Front Access
Glove

Complaint Procedure
Conditioner, Automotive, Air

Cooling System

Care
Coolant Recommendation

Overheating Caution
Cruise Control
Customer Service

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

D

Defrosters
Differential, Final Drive

Dimensions, Vehicle
Dimmer Switch, Headlamp

Directional Signal

Distributor

Dome Lights

Driver Check List
Driver's Seat
Dusty Condition, Operation Under

~

~

~

~

~

~

~

~

~

PAGE

~

~

~
~

~

~

~

NO

37
47

43

44, 45

56

10

47

29,50-53

18

42

34,35

21

17,58
17, 58

34
32
33

12

38
37

59
22

45
46

29

14

59

21-23

43
55

17
13

48
20

48

.

5

8

5

5
6

65

~

SUBJECT

E

Electrical Systems

Batteries

Battery Boost Switch

Bulbs, Light

~

~

~

Charging System Indicator Light

Diode Assembly
Emergency Exit
Emergency, In Case Of

~

~

~

Brake System Warning Light
Charging System Warning Light
Emergency Starting

~
Hazard Warning Flasher
Jacking Instructions
Jump Starting
Overheated Engine
Power Level System

Pushing to Start
Towing

~
Energizer (See Batteries)
Engine Access

~

Engine Coolant Reservoir
Engine Compartment

~

~

~

~

~

~

~

~

Engine Oil

Capacity

Dip Stick

Filter

Pressure Gauge

Recommendation
Entrance Door
Ethylene Glycol Coolant

Exhaust Gas Caution

~

~

~

~

~

~

~

~

Parked with Engine Running

Exit, Emergency
Exterior Finish Care

Fabric Care
Filters

~
Final Drive Differential
Finish Care, Exterior

~

~

F

~

~

~

Flammable Cleaning Solvents
Flashers

Hazard Warning

Turn Signal
Flooded Engine
Floor Controls

~

~

Fluid Capacities

~

~

~

Fluid Levels

Batteries

Brake Master Cylinder

Engine Oil

~

~

~

PAGE

NO

21, 48,56

~

~

~

~

21
58

18

21
31
27

19
18

27
27

29
2 7
29
26

SUBJECT

.

Final Drive
Power Steering

Radiator
Transmission

~

~

~

~
Foreign Countries, Operation in
Four-Way Hazard Warning Flasher
Front Access Doors

Front Suspension

~

~

Fuel

Filler Cap Location

Gauge

~

Recommendation

~

~

Tank Selector Switch

Fumes, Engine Exhaust

~

Fuses

Vehicle Chart
Vehicle Location

~

~

PAGE

NO

.

43
43
45
41

~

~

9

27
37

53

47

17

46

~

20

10

57
49

27
30
48
38
44

38

56
41

Gas Station Information..
Gasoline (See Fuel)
Generator Indicator Light

General Data & Specifications
Glass and Mirrors
Glove Box

~

Gross Vehicle Weight (GVW)

G

(Inside Back Cover)

~

~

~

~

46

18
55

35

5

~

2

40,56

~

40, 56, 57

17

40

46

10
10

31
34

33

43

Hazard Warning Flasher

6

Headlight

Adjustment

Flicker

~
High Beam Dimmer Switch
High Beam Indicator

Replacement
Switch

~
Heater, Operation
Hitches, Trailer
Hoisting Vehicle

Horn

~

~

~

~

H

~

27,50

49
17

~

~

~

17
17

49
20

~

21

8

39

13

34

~

27, 50, 58

21, 48, 56

33

13,58

12
15

56

44

40

1

Identification Lights
Identification Number, Vehicle

Identification Plate, Vehicle
Ignition, Keys and Lock

In Case of Emergency
Indicator Lights
Infant Restraining Methods
Inflation Pressure, Tire

Instrument Panel
Interior Appearance Care

~

~

~

~

~

~

~

~

~

~

20,58

3,55

3

5,11

27

18

8
50
18
32

66

~

~

SUBJECT

J

Jack Usage Instructions

Jump Starting

~

~

K

Keys

~

Knocking Engine

Lane Change and Turn Signal

Lap Belts

Latch, Door

Leveling, Vehicle

Lighter, Cigar
Lights

Linings, Brake

Loading, Vehicle
Locks
Low Temperature Operation

Lubrication Details

~

Brake Warning
Bright Beam Indicator
Bulb Chart
Charging System
Dome
Hazard Flasher

Headlight Aim

Headlight Circuit Breaker

Headlight Switch

Marker & Clearance

Parking Brake
Tail Lights
Tell Tale Warning
Turn Signal Indicator

~

~

L

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

M

Maintenance

Appearance Care

Manual

Master Cylinder, Brake

Marker Lights
Metal Cleaners
Methods of Restraining Children
Mirrors, Rear View
Mobile Radio Transmitter

New Vehicle Break-In

~

~

~

~

~

~

~

~

N

~

0

Odometer

Oil

~

Additives

~

PAGE

NO

29
27

46

13

25
21

19
17

58

18
20
27

49

17
20
20

19
20

19

13

16

12

40

32
63
44
20
34

25

17

40

.

SUBJECT

Checking Engine Oil Level
Pressure Gauge
Recommendations
Transmission

Viscosity

Operation in Foreign Countries

5

Overheated Engine

Temperature Gauge
What To Do

Owner Assistance

7

6

Paint, Care and Touch Up

Parking

Plugs, Spark

Points, Distributor
Polishing and Waxing
Power

Pressure, Tire Inflation

Radiator and Coolant
Radio

2
5

Raising Vehicle With Jack
Rear Suspension
Rear Wheel Bearings
Restraints, Child

Rotation, Tire

Safety

8
5

Schedule, Break-In

Seat

9

Self Adjusting Brakes
Service and Maintenance

Service Assistance, After-Hour

Shock Absorbers
Signals, Turn

~

Brake
Lights

Brakes
Level System

Steering

AM
AM/FM
Antenna
Mobile Transmitter

Stereo
Tape System

Belts, Lap

Maintenance

Adjustments

Belts

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

PAGE

~

~

~

~

P

~

NO

40

17

40
41

40

17

17

59

35

11
16

20

49,56

48
35

15

25

14

50

.

9

R

44

23
23
24

~

~

25

24
24
29

54
53

8

52

S

7
9

36

6
7

16

~

~

36
63

53,

53,54

13

6 7

~

~

SUBJECT

Solvents, Recommended Cleaning
Spark Knock

Spark Plugs
Speakers, Radio

Specifications

Air Cleaner
Body
Capacities

Dimensions
Filters
Fuses

Light Bulbs
Miscellaneous
PCV Valve

Vehicle Identification

Speedometer and Odometer
Spot Cleaner
Stains, Removal Of
Starter, Safety Switch
Starting Engine

Cold Weather
Emergency

Steering

Column Controls

Linkage
Maintenance

Power

Tilt
Wheel

Stereo, Radio and Tape
Sudden Service
Suspension

Front
Rear

Swivel Seats

Tape System, Stereo
Tell Tale Lights

Temperature

Control, Cooling and Heating
Gauge

Thermostat, Engine Cooling
Tilt Steering Wheel
Tire

Care

Changing

Inflation Pressure

Inspection

Load Limit

Replacement

Rotation

Snow

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

T

~

~

~

~

~

~

~

~

~

~

~

~

~

PAGE

~

~

NO

33
46

49,56

23

56
5-5

56
55
56

57,58

58
56
57
55

17
32
34

11

11

12
2 7

11
44
44

14

14

11
23

63

53

54

24

19

21

17

46

14

50

29

50

52

51

51

52

51

.

SUBJECT

Traction

Tread Wear
Towing
Trailer Hauling
Transmission

Transmitter, Mobile Radio
Tread Wear Indicators

Trim Care Interior

Turn Signals

~

Braking Effect On Hills

Checking Fluid Level

Maintenance
Shift Controls

~

~

~

~

~

~

~

~

~

~

~

U

Underbody Maintenance
Undercoating
Upholstery

~

~

~

V

Vehicle Identification

Volatile Cleaning Solvents, Caution

Warning Flasher, Hazard
Warning Lights

Brake

~
Charging System
Cluster
Low Fuel

Washers, Windshield
Washing

Waxing

Weight Distribution
Wheel Alignment

6

Wheel Bearings

Front

Rear
Wheel Changing
Wheel, Tilt Steering
Windshield

Defrosting

Washers

Wipers
Wrecker, Towing

~

~

~

~

~

~

~

~

~

W

~

~

~

~

~

~

~

~

~

Z

Zone Offices

Canada

Mexico

United States

Zone Territories

Canada

United States

~

~

~

~

~

~

PAGE

NO

51

52
30

13
41
41

12
25

52
32

13

54

35,54

32

3,55

33

2 7

19
18

19

19
20
34

35

57

53
53

51

14

21
20
20

30

62
61
61

62
60

.

8

2

6

8

GAS

STATION

INFORMATION

Refer to SERVICE AND MAINTENANCE

section for details on removal and installation

FRONT ACCESS DOORS-Release by turning

latch knob to the left to loosen
of engine cover, placing vehicle on suitable
hoist, etc

.

CAUTION

To help prevent the possibility of fire or
explosion, turn off LP gas supply at
the LP gas tank and be sure all pilots are

out, before filling gasoline tanks

Always check that fluid inputs are
made into the correct filler opening to
help avoid serious personal injury and

property damage

.

.

GAS CAP -Located on the left side of the

vehicle, directly under the driver's window

. See

gas cap removal procedure in SERVICE AND

MAINTENANCE section

.

ENGINE OIL DIPSTICK-Located inside the
left front access door

operation in a fuel stop

"ADD" and "FULL" marks on dipstick

.

Front Access Doors

. Check oil level as the last

. Maintain between

.

ENGINE OIL RECOMMENDATION -Use
only high quality SE oils

SERVICE AND MAINTENANCE section will

serve as a guide for selecting proper oil viscosity
TIRE INFLATION PRESSURES

least monthly
on tire placard affixed on the inside of the glove
compartment door

Gas Cap Location

WINDSHIELD WASHER -Check reservoir
fluid level regularly
as GM Optikleen

GASOLINE RECOMMENDATION -Use an
unleaded fuel of at least 91 Research Octane-

Symbol Number 2

. Additional details on Fuel

Requirements are given in the SERVICE AND
MAINTENANCE section

.

ENERGIZER (BATTERIES) -Check fluid

level monthly
drinking water or distilled water to bring level

to split ring in filler opening

. The chart in the

.

- Check at

. Keep inflated to pressures shown

.

. Use a washer fluid, such

.

. Add only colorless, odorless

.