GMC SIERRA 1998 User Manual
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S I E R R A

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C O M F O R T A B L Y 1 N C O M M A N D . ' "

The 1998 GMC Sierra Owner's Manual

1-1Seats and Restraint Systems

This section tellsyou how to use your seats and safety belts properly.Tt also explains the air bag system.

2- 1 Features and Controls

This section explains how to start and operate your vehicle.

3- 1 Comfort Controls and AudioSystems

This section tells you how to adjust the ventilation and comfort controls and how to operate your audio system.

4- 1 Your Driving and the Road

Here you'll find helpful information and tips about the road and how t o drive under different conditions.

5-1Problems on the Road

This section tells what to do if you have a problem while driving? suchas a flat tire or overheated engine, etc.

6-1Service and Appearance Care

Here the manual tells you how to keep your vehicle running properly and looking good.

7-1Maintenance Schedule

This section tells you when t o perform vehicle maintenance and what fluids and lubricants to use.

8-1Customer AssistanceInformation

This section tells you how to contact GMC for assistance and how to get service and owner publications. It also gives you information on "Reporting Safety Defects" on page 8- 10.

9-1Index

Here's an alphabetical listing of almost every subject in this manual. You can useit to quickly find something you want to read.

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We support voluntary technician certification.

GENERAL MOTORS, GM, the GM Emblem, GMC, the GMC Emblem and the name SIERRA are registered trademarks of General Motors Corporation.

This manual includes the latest information at the time it was printed, We reserve the right to make changes in the product after that time without further notice. For vehicles first sold in Canada, substitute the name “General Motors of Canada Limited” for GMC whenever it appears in this manual.

Please keep this manual in your vehicle, so it will be there if you ever need it when you’re on the road.If you sell the vehicle, please leave this manual init so the new owner can useit.

Litho inU.S.A.

X9804 B First Edition

WE SUPPORT

VOLUNTARY TECHNICIAN

CERTIFICATIONTHROUGH

National Institutefar

A U T O M O T I V E

S E R V I C E

E X C E L L E N C E

For Canadian OwnersWho Prefer a French Language Manual:

Aux propribtaires canadiens:Vous pouvez vous procurer un exemplaire de ce guide enfraqais chez votre concessionaire ou au:

DGN Marketing Services Ltd. 1500 Bonhill Rd. Mississauga, Ontario L5T IC7

@CopyrightGeneral Motors Corporation 1997

All Rights Reserved

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How to Use this Manual

Many people readtheir owner’s manual from beginning to end when they first receive their new vehicle. If you do this, it will help you learn aboutthe features and controls foryour vehicle. In this manual, you’ll find that pictures and words work together to explain things quickly.

Index

A good place tolook for what you need is the Index in back of the manual. It’s an alphabetical list of what’s in the manual, and the page number where you’ll find it.

Safety Warnings and Symbols

You will find a number of safety cautions in this book. Weuse a box and the word CAUTIONto tell you about things that could hurt you if you were to ignore the warning.

A CAUTION:1

These mean there is something thatcould hurt you or other people.

In the caution area,we tell you what the hazard is. Then we tell you what to do tohelp avoid or reduce the hazard. Please read these cautions.If you don’t, you or others could be hurt.

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You will also find a circle with a slash throughit in this book. This safety symbol means “Don’t)’‘ “Don’t do this” or “Don’t let this happen.”

Vehicle Damage Warnings

Also, in this book you will find these notices:

I NOTICE:

These mean there is something thatcould damage your vehicle.

I n the noticearea, we tell you about something thatcan damage your vehicle. Many times, this damage would not becovered by your warranty, andit could becostly. But the notice will tell you what to do to help avoid the damage.

When you read other manuals, you might see CAUTION and NOTICE warnings in different colors or in different words.

You’ll also see warning labels on your vehicle. They use the same words, CAUTION or NOTICE.

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Vehicle Symbols

These are some of the symbols you may find on your vehicle.

For example.

these symbols are used on an originnl battery:

CAUTION A POSSIBLE

INJURY

PROTECT

EYES BY

SHIELDING

CAUSTIC

BATTERY

ACID COULD

CAUSE

BURNS

AVOID

SPARKS OR

FLAMES

SPARK OR ,\I/, FLAME

COULD EXPLODE BATTERY

These symbols are important for you and your passengers whenever your vehicle is driven:

DOOR LOCK

UNLOCK

FASTEN

SEAT

BELTS

POWER

WINDOW

These symbols

These symbols

have to dowith

are on some of

your lamps:

your controls:

WIPER Q

TURN ee

SIGNALS

WINDSHIELD

DEFROSTER

WINDOW

DAYTIME *'***'ODEFOGGER

RUNNING

LAMPS *

FOG LAMPS #0

VENTILATING

FAN

 

These symbols

Here are some

are used on

other symbols

warning and

you may see:

indicator lights:

 

ENGINE -k COOLANTtd

TEMP

BATTERY

CHARGING

SYSTEM

BRAKE (@)

rr

ENGINE OIL w, PRESSURE

ANTI-LOCK(@) BRAKES

FUSE -%-

t

LIGHTER

HORN )tr

SPEAKER b FUELno

V

Model Reference

.smanual covers these models:

Crew Cab

Regular Cab Pickup

 

Chassis Cab

Extended Cab Pickup

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l

l 3500HD Chassis Cab

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Section 1 Seats and RestraintSystems

Here you’ll find information aboutthe seats in your vehicle andhow to use your safety belts properly.You can also learn about some thingsyou shouldnot do with air bagsand safety belts.

1-2

Seats and Seat Controls

1-34

Rear Seat Passengers

1-9

Safety Belts: They’re for Everyone

1-40

Rear Safety Belt Comfort Gu’idesfor

1-13

Here Are QuestionsMany People Ask About

 

Children and Small Adults

1-14

Safety Belts-- and the Answers

1-42

Children

How to Wear Safety Belts Properly

1-45

Child

Restraints

1-14

Driver Position

1-67

Larger

Children

1-22

Safety Belt Use During Pregnancy

1-70

Safety Belt Extender

1-23

Right Front Passenger Position

1-70

Checking Your Restraint Systems

1-23

Air Bag System

1-70

Replacing Restraint SystemParts After

1-32

Center Passenger Position

 

a Crash

Seats and Seat Controls

This section tells you about the seats -- how to adjust them, and fold themup and down. It also tells you about reclining front seatbacks and head restraints.

Manual Front Seat

I /!\ CAUTIO-.:

You can lose controlof the vehicleif you try to adjust a manual driver’s seat while the vehicleis moving. The sudden movement could startle and confuse you, or make you pusha pedal when you don’t want to. Adjust the driver’s seat only when the vehicle is not moving.

If your vehicle has a manual bucket, split bench orfull bench seat, youcan adjust it with this leverat the front of the seat.

Slide the lever at the front of the seat toward the passenger’s side to unlock it. Using your body, slide the seat to where you wantit. Then, release the lever and tryto move the seat with your body in order to make sure the seatis locked into place.

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Power Driver’s Seat (Option)

The switch located at the front of this controlpanel is for the power lumbar adjustment, which is explained next.

Power LumbarControl (If Equipped)

If your vehicle hasa power seat on the driver’s side, you adjust it with these controls at the outsideedge of the seat.

You can use the round center knobto move the seat to where you want it. To raise the seat, move the knob up. To lower the seat, move the knob down. To move the seat forward,move the knob toward the front ofthe vehicle, To move the seat rearward, move the knob towardthe rear of the vehicle.

You can also raise and lower the front and rearof the seat. To raise the front of the seat, move thefront lever up. To lower the front ofthe seat, movethe front lever down.To raise the rear of the seat, move the rear leverup. To lower the rear of the seat. move the rear lever down.

If you have power lumbar adjustment, you can increase or decrease lumbar support in an

area of the lower seatback.

can

To increase support, press andhold the frontof the rocker switch. Let go of the switch when the lower seatback reachesthe desired level of support.

To decrease support,press and hold the rear of the rocker switch. Letgo of the switch when the lower seatback reaches the desired levelof support.

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To adjust the front seatback, move the lever rearward. Release the lever to lock the seatback where you want it. Move the lever again rearward and the seatback will go to an upright position.

But don’t have a seatback reclined if your vehicle is moving.

1-4

Head Restraints

Sitting in a reclined position whenyour vehicle is in motion can be dangerous. Evenif you buckle up, your safety belts can’tdo theirjob when you’re reclined like this.

The shoulder belt can’t do its job because it won’t be against your body. Instead,it will be in front of you. In a crashyou could go into it, receiving neckor otherinjuries.

The lap belt can’tdo its jobeither. In a crashthe belt could go up over your abdomen.The belt forces would bethere, not at your pelvic bones. This could causeserious internal injuries.

For proper protection whenthe vehicle is in motion, have the seatback upright. Then sit well

back in the seat and wear your safety belt properly.

Slide thehead restraint up ordown so that the topof the restraint is closest to the topof your ears. This position reduces the chance of a neck injury in a crash.

Seatback Latches

The front seatbackof the base-levelbench seat folds forward to let you access the rearof the cab. Your seatback willmove back and forthfreely, unless you come to a sudden stop. Then willit lock intoplace. If you have a Crew Cab,your front seatback isdesigned not to fold forwardAccess. to the rear of the cabis available by using the rear doors.

The front seatbackof the splitbench seat and bucket seats fold forward tolet you access the rear of the cab.

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1-5

To fold a front split bench or bucket seatback forward, pull this lever forward and fold the seatback forward.

To return the seatback to the upright position, just push the seatback rearward until it latches. After returning the seatback to itsupright position, pull the seatback forward to make sure it is locked.

If the seatback isn’t locked,it could move forward ina sudden stop or crash. That could cause injury to the person sitting there. Always press rearward on the seatbackto be sureit

is locked.

Easy Entry Seat (ExtendedCab Only)

The manual driver and passenger front bucket seats and the manual 60/40 split bench seat of your vehicle have an easy entry feature. Thismakes it easy to get in and out of the rear seat. On vehicles with the power driver’s seat, only the front passenger’s seat has the easy entry feature.

To operate the seat, pull forward on the top of this lever and tilt the back forward toward the front of the vehicle.

When you do, the seat bottom will release. Just pull or push the seat forward until it stops.

To return the seat to its regular position, return the seatback to itsupright position, then push the whole seat rearward until it latches.

1-6

After returning the seatto its regular position,try to move the seat with your body in order to makesure the seat islocked into place.

I A LAUTION:

If any easyentry seat isn’t locked,it can move. In a sudden stop or crash, the person sitting there could beinjured. And, even ifthere is no crash or sudden stop, a driversitting in an unlocked easy entry seat could be startled by the sudden movement and hit the wrong control or pedal, causing an accident. Afteryou’ve usedit, be sure to push rearward on any easy entry seat to be sure it is locked.

Rear Seat(Extended Cab)

Folding the Rear Seat

The Extended Cab may have arear folding seat which can be folded up to provide more cargo space.To fold theseat:

1. Pull forward on the RELEASE lever under

the seat cushion,behind the passenger’s side front seat. Fold the seatback forward until it latcheswith the

seat cushion.

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2. Lift the entire seat and push it rearward into place.

3. Make sure the seat is secure.

The Extended Cab’s rear seat can also be folded open for more seating space. To use the seat:

1.Pull the entire seatforward until it is flat.

2.Then pull forward on the RELEASE lever under the seat cushion, on the passenger’s side of the rear seat. Push the seatback rearward until it latches.

3.After pushing the seatbackupright into position, pull the seatback forward to make sure it is locked.

Rear Seat (Crew Cab)

The rear seatback without a centerarmrest can be folded forward to let you reach the area behind it. Your seatback will move back and forth freely, unless you come to asudden stop. Then, it will lock into place.

The rear seatback with a center armrest folds forward to let you access the area behind it.

To fold a seatback forward, pull this leverforward and fold the seatback forward.

To return the seatback to the upright position, just push the seatback rearward until it latches. After returning the seatback to its upright position, pull the seatback forward to make sure it is locked.

1-8