GMC T-Series 2007 Owner's Manual

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Page 1

Seats and Restraint Systems

...................... 21

Front Seats

............................................ 22

Safety Belts

............................................ 28

Child Restraints

...................................... 43

Restraint System Check

......................... 56

Features and Controls

................................. 59

Keys

....................................................... 60

Doors and Locks

.................................... 61

Windows

................................................ 62

Starting and Operating Your Vehicle

....... 65

Mirrors

.................................................... 93

Storage Areas

........................................ 94

Instrument Panel

.......................................... 97

Instrument Panel Overview

................... 100

Climate Controls

................................... 114

Warning Lights, Gages,

and Indicators

.................................... 118

Audio System(s)

................................... 137

Driving Your Vehicle

.................................. 147

Your Driving, the Road, and

Your Vehicle

..................................... 148

Towing

................................................. 182

Service and Appearance Care

................... 189

Service

................................................. 191

Fuel

...................................................... 195

Checking Things Under the Hood

......... 206

Rear Axle

............................................. 241

Cab Tilting

............................................ 242

Noise Control System

........................... 248

Bulb Replacement

................................ 250

Windshield Wiper Blade Replacement

... 250

Other Service Items

.............................. 251

Tires

..................................................... 254

Appearance Care

.................................. 267

Vehicle Identiﬁcation

............................. 275

Electrical System

.................................. 276

2007 GMC T-Series Owner Manual M

Page 2

Capacities and Speciﬁcations

................ 285

Normal Maintenance

Replacement Parts

............................ 288

Maintenance Schedule

............................... 291

Maintenance Schedule

.......................... 292

Customer Assistance Information

............. 327

Customer Assistance and Information

.... 328

Reporting Safety Defects

...................... 336

Vehicle Data Recording and Privacy

..... 339

Index

........................................................... 343

Page 3

GENERAL MOTORS, GM, the GM Emblem, GMC, and the GMC Truck Emblem 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 after that time without further notice. For vehicles ﬁrst sold in Canada, substitute the name “General Motors of Canada Limited” for GM Medium Duty Truck Division when it appears in this manual.

This manual describes features that may be available in this model, but your vehicle may not have all of them. For example, more than one entertainment system may be offered or your vehicle may have been ordered without a front passenger or rear seats.

Keep this manual in the vehicle, so it will be there if it is needed while you are on the road. If the vehicle is sold, leave this manual in the vehicle.

Canadian Owners

A French language copy of this manual can be obtained from your dealer/retailer or from:

Helm, Incorporated P.O. Box 07130 Detroit, MI 48207

Emission Control Systems Warranty

The emission warranty on your vehicle is issued in accordance with the U.S. Federal Clean Air Act. Defects in material or workmanship in Isuzu emission parts may also be covered under the Medium Duty Truck Limited Warranty coverage. There may be additional coverage on GM diesel engine chassis. In any case, the warranty with the broadest coverage applies.

Litho in U.S.A. Part No. 15862470 B Second Printing

Page 4

What Is Covered

The parts covered under the emission warranty are listed under the “Emission Warranty Parts List” later in this section.

How to Determine the Applicable Emission Control System Warranty

State and Federal agencies may require a different emission control system warranty for chassis depending on:

• Whether the vehicle conforms to regulations

applicable to light duty or heavy duty emission control systems

• Whether the vehicle or engine conforms to

California regulations in addition to U.S. Environmental Protection Agency (EPA) Federal regulations

To determine eligibility: Light Duty vehicles with a Gross Vehicle Weight Rating (GVWR) of 8,500 lbs. or less; Heavy Duty vehicles with a GVWR of 8,500 lbs. or greater.

All vehicles are eligible for Federal Emissions Control System Warranty Coverage. If the emissions control label contains language stating the vehicle conforms to California regulations, the vehicle is also eligible for California Emissions Control System Warranty Coverage.

Federal Emission Control System Warranty

Federal Warranty Coverage is as follows:

• Vehicles with a 8,500 GVWR or less equipped

with a Light Duty Emission Control System Gasoline Engine

− 2 years or 24,000 miles, and 8 years or 80,000 miles for the catalytic converter or vehicle, powertrain control module, whichever comes ﬁrst.

• Vehicles with a 8,500 GVWR or greater

equipped with a Heavy Duty Gasoline Engine

− 5 years or 50,000 miles, whichever comes ﬁrst.

• Vehicles with a 14,000 GVWR or less

equipped with a Heavy Duty Diesel Engine

− 5 years or 50,000 miles, whichever comes ﬁrst.

• Vehicles with a 14,000 GVWR or greater

equipped with a Heavy Duty Diesel Engine

− 5 years or 100,000 miles, whichever comes ﬁrst.

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Federal Emission Defect Warranty

GM warrants to the owner the following:

• The vehicle was designed, equipped, and built

so as to conform at the time of sale with applicable regulations of the Federal Environmental Protection Agency (EPA)

• The vehicle is free from defects in materials

and workmanship which cause the chassis to fail to conform with those regulations during the emission warranty period

Emission related defects in the genuine GM parts listed under the Emission Warranty Parts List covered, including related diagnostic costs, parts, and labor are covered by this warranty.

Federal Emission Performance Warranty

Some states and/or local jurisdictions have established periodic Chassis Inspection and Maintenance (I/M) programs to encourage proper maintenance of the chassis. If an EPA approved I/M program is enforced in your area, you may

also be eligible for Emission Performance Warranty coverage when all of the following three conditions are met:

• The chassis has been maintained and

operated in accordance with the instructions for proper maintenance and use set forth in the owner manual supplied with the chassis.

• The chassis fails an EPA approved I/M test

during the emission warranty period.

• The failure results, or will result, in the owner

of the chassis having to bear a penalty or other sanctions (including the denial of the right to use the chassis) under local, state, or federal law.

GM warrants that your dealer will replace, repair, or adjust to GM speciﬁcations, at no charge to you, any of the parts listed under the “Emission Warranty Parts List” later in this section which may be necessary to conform to the applicable emission standards. Non-GM parts labeled “Certiﬁed to EPA Standards” are covered by the Federal Emission Performance Warranty.

Page 6

California Emission Control System Warranty

This section outlines the emission warranty that GM provides for the chassis in accordance with the California Air Resources Board. Defects in material or workmanship in GM emission parts may also be covered under the Medium Duty Limited Warranty coverage. There may be additional coverage on GM diesel engine chassis. In any case, the warranty with the broadest coverage applies.

This warranty applies if the chassis meets both of the following requirements:

• The chassis is registered in California or

other states adopting California emission and warranty regulations*.

• The chassis conforms to California regulations

as indicated on the chassis emission control label.

Important: *Massachusetts, Maine, and Vermont have California Emissions Control System Warranty coverage. (New York adopted California emission standards, but not the California emissions warranty. The Federal Emissions Control System warranty applies to all vehicles in New York.)

Your Rights and Obligations (For Chassis Subject to California Exhaust Emission Standards)

The Emission Control System Warranty on your vehicle is issued in accordance with the California Air Resources Board and GM. In California, new chassis must be designed, equipped, and built to meet the state’s stringent anti-smog standards. GM must warrant the chassis emission control system for the periods of time and mileage listed below provided there has been no abuse, neglect, or improper maintenance of your chassis. The chassis emission control system may include parts such as the fuel injection system, ignition system, catalytic converter, and engine computer. Also included are hoses, belts, connectors, and other emission related assemblies.

Where a warrantable condition exists, GM will repair the chassis at no cost to you including diagnosis, parts, and labor.

Page 7

California Emission Defect and Emission Performance Warranty Coverage

•

For 3 years or 50,000 miles, whichever comes ﬁrst, vehicles with a GVWR of 14,000 lbs. or less:

For 5 years or 50,000 miles, whichever comes ﬁrst, gasoline vehicles with a GVWR of 14,000 lbs. or more:

For 5 years or 100,000 miles, whichever comes ﬁrst, diesel vehicles with a GVWR of 14,000 lbs. or more:

− If your vehicle fails a smog check inspection, GM will make all necessary repairs and adjustments to ensure that your vehicle passes the inspection. This is your Emission Control System Performance Warranty.

− If any emission related part on your vehicle is defective, GM will repair or replace it. This is your Short-term Emission Defects Warranty.

• For 7 years or 70,000 miles, whichever comes

ﬁrst, vehicles with a GVWR of 14,000 lbs. or less:

− If an emission related part listed in this booklet specially noted with coverage for 7 years or 70,000 miles is defective, GM will repair or replace it. This is your Long-term Emission Control System Defects Warranty.

• For 8 years or 80,000 miles, whichever comes

ﬁrst, vehicles with a GVWR of 8,500 lbs. or less:

− If the catalytic converter or vehicle, powertrain, control module is found to be defective, GM will repair or replace it under the Federal Emission Control System Warranty.

Any authorized GM dealer will, as necessary under these warranties, replace, repair, or adjust to GM speciﬁcations any genuine GM parts that affect emissions.

The applicable warranty period shall begin on the date the chassis is delivered to the ﬁrst retail purchaser.

Page 8

Owner’s Warranty Responsibilities

As the vehicle owner, you are responsible for the performance of the scheduled maintenance listed in your owner manual. GM recommends that you retain all maintenance receipts for the chassis, but GM cannot deny warranty coverage solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.

You are responsible for presenting your chassis to a GM dealer as soon as a problem exists. The warranted repairs should be completed in a reasonable amount of time, not to exceed 30 days.

As the vehicle owner, you should also be aware that GM may deny warranty coverage if your chassis or a part has failed due to abuse, neglect, improper or insufficient maintenance, or modiﬁcations not approved by GM.

If you have any questions regarding your rights and responsibilities under these warranties, you should contact Customer Assistance Center at 1-800-222-1020 or, in California, write to:

State of California Air Resources Board Mobile Source Operations Division P.O. Box 8001 El Monte, CA 91731-2990

Emission Warranty Parts List

The emission parts listed here are covered under the Emission Control System Warranty. The terms are explained previously in this section under Federal Emission Control System Warranty and California Emission Control System Warranty.

Important: Certain parts may be covered beyond these warranties if shown with asterisk(s) as follows:

• (*) 7 years/70,000 miles, whichever comes

ﬁrst, California Emission Control System Warranty coverage.

• (**) 8 years/80,000 miles, whichever comes

ﬁrst, California Emission Control System Warranty coverage.

The Emission Control Systems Warranties obligations do not apply to conditions resulting from tampering, abuse, neglect, or improper maintenance; or any other item listed under “What Is Not Covered” in the New Vehicle Limited Warranty in the warranty booklet. The “Other Terms” presented in the New Vehicle Limited Warranty also apply to the emission related warranties.

Page 9

Powertrain Control System

Anti-lock Brake System (ABS) Control Module ** Camshaft Position Actuator * Camshaft Position Actuator Valve Coolant Level Sensor Data Link Connector Electronic Throttle Control (ETC) Motor Engine Control Module (ECM) * Engine Coolant Temperature Sensor Fast Idle Solenoid Flexible Fuel Sensor * Intake Air Temperature Sensor Intake Manifold Temperature Sensor

(7.8L Isuzu Diesel) Malfunction Indicator Lamp Manifold Absolute Pressure Sensor Mass Air Flow Sensor Oil Pressure Sensor (DOD™) Oil Pressure Sensor (7.8L Isuzu Diesel) Oxygen Sensors

Powertrain Control Module (PCM) ** Programmable Read Only Memory (PROM) Throttle Position Sensor Throttle Position Switch Vehicle Control Module (VCM) ** Vehicle Speed Sensor Wheel Speed Sensor

Transmission Controls and Torque Management

IsuzuLAN (CAN) Communications Circuit PARK/NEUTRAL Switch Torque Converter Clutch Solenoids Transmission Control Module ** Transmission Fluid Temperature Sensor Transmission Gear Selection Switch (Diesel) Transmission Internal Mode Switch Transmission Pressure Control Solenoids1&2 Transmission Pressure Switches Transmission Shift Solenoids 1,2&3 Transmission Speed Sensors

Page 10

Fuel Management System

Common Rail Assembly (6.6L DURAMAX

Diesel) * Common Rail Assembly (7.8L Isuzu Diesel) Diesel Fuel Injection Pump * Diesel Fuel Injection Pump Timing Adjust Diesel Fuel Injector Control Module – EDU

(6.6L DURAMAX

Diesel) * Diesel Fuel Temperature Sensor Direct Fuel Injector Assembly (6.6L DURAMAX

Diesel) *

Function Block (6.6L DURAMAX

Diesel) Fuel Injector Fuel Pressure Regulator Fuel Rail Assembly * Fuel Rail Pressure Sensor (6.6L DURAMAX

Diesel)

Fuel Rail Pressure Sensor (7.8L Isuzu Diesel)

Air Management System

Air Cleaner Air Cleaner Diaphragm Isuzu Motor Air Cleaner Resonator Air Cleaner Temperature Compensator Valve Air Intake Ducts Charge Air Control Actuator Charge Air Control Solenoid Valve Charge Air Control Valve Charge Air Cooler (6.6L DURAMAX

Diesel) * Charge Air Cooler (7.8L Isuzu Diesel) * Charge Air Cooler Fan Idle Air Control Valve Idle Speed Control Motor Intake Manifold * Intake Manifold Gasket (7/70 only Terraza,

Uplander, Montana SV6, RELAY, & DURAMAX

Diesel) *

Page 11

Intake Manifold Gasket (7.8L Isuzu Diesel) * Intake Manifold Heater Intake Manifold Tuning Valve Intake Manifold Tuning Valve Relay Supercharger Assembly * Throttle Body * (Replacement Only) Throttle Body Heater Throttle Closing Dashpot Turbocharger Assembly * Turbocharger Boost Sensor (6.6L DURAMAX

Diesel) Turbocharger Boost Sensor (7.8L Isuzu Diesel) Turbocharger Oil Separator Turbocharger Thermo Purge Switch Vacuum Pump (6.6L DURAMAX

Diesel)

Ignition System

Camshaft Position Sensor(s) Crankshaft Position Sensor(s) Distributor Distributor Cap Distributor Pick Up Coil Distributor Rotor Glow Plug(s) (Diesel) Glow Plug Controller (Diesel) Glow Plug Relay (Diesel) Ignition Coil(s) Ignition Control Module Ignition Timing Adjustment Knock Sensor Spark Plug Wires Spark Plugs

Page 12

Catalytic Converter System

Catalytic Converter(s) and Muffler if attached as

assembly **

Diesel Particulate Filter assembly

(7.8L Isuzu Diesel)

Exhaust Manifold

(C/K Trucks < 14,000 GVWR 8.1L) Exhaust Manifold (7.8L Isuzu Diesel) Exhaust Manifold with Catalytic Converter if

attached as assembly * Exhaust Manifold Gasket Exhaust Pipes and/or Mufflers (when located

between catalytic converters and exhaust

manifold) Exhaust Pipes and/or Mufflers (when located

between catalytic converters and exhaust

manifold - 7.8L Isuzu Diesel) Exhaust Throttle (7.8L Isuzu Diesel)

Positive Crankcase Ventilation (PCV) System

Oil Filler Cap PCV Filter PCV Oil Separator PCV Valve

Exhaust Gas Recirculation (EGR) System

EGR Feed and Delivery Pipes or Cast-in Passages EGR Valve EGR Valve Assembly (7.8L Isuzu Diesel) EGR Valve Cooler (6.6L DURAMAX

Diesel) EGR Cooler (7.8L Isuzu Diesel) EGR Vacuum Pump Assembly (6.6L DURAMAX

Diesel)

Secondary Air Injection System

Air Pump Check Valves

Page 13

Evaporative Emission Control System (Gasoline Engines)

Canister Canister Purge Solenoid Valve Canister Vent Solenoid Fuel Feed and Return Pipes and Hoses Fuel Filler Cap Fuel Level Sensor Fuel Limiter Vent Valve * Fuel Tank Filler Pipe (with restrictor) Fuel Tank(s) * Fuel Tank Vacuum or Pressure Sensor

Hybrid

Auxiliary Transmission Pump, Relay, and Circuit Battery Pack Current Sensor and Circuit Battery Pack 12V Modules (3) Brake Pedal Switch (PCM ZAB Switch)

Energy Storage Control Module * IsuzuLAN (CAN) Communications Circuit Hood Ajar Switch and Circuit Hybrid Control Module ** SGCM Coolant Circuit (fan and fan relay

and pump) Starter Generator Control Module * Wheel Speed Sensor and Circuits

(left and right front)

Miscellaneous Items Used with Above Components are Covered

Belts Boots Clamps Connectors Ducts

Page 14

Fittings Gaskets Grommets Hoses Housings Mounting Hardware Pipes Pulleys Sealing Devices Springs Tubes Wiring Parts speciﬁed in your maintenance schedule that

require scheduled replacement are covered up to their ﬁrst replacement interval or the applicable emission warranty coverage period, whichever comes ﬁrst. If failure of one of these parts results in failure of another part, both will be covered under the Emission Control System Warranty.

For detailed information concerning speciﬁc parts covered by these emission control systems warranties, ask your dealer.

Replacement Parts

The emission control systems of your chassis were designed, built, and tested using genuine GM parts* and the chassis is certiﬁed as being in conformity with applicable federal and California emission requirements. Accordingly, it is

recommended that any replacement parts used for maintenance or for the repair of emission control systems be new, genuine GM parts.

The warranty obligations are not dependent upon the use of any particular brand of replacement parts. The owner may elect to use non-genuine GM parts for replacement purposes. Use of replacement parts which are not of equivalent quality may impair the effectiveness of emission control systems.

If other than new, genuine GM parts are used for maintenance replacements or for the repair of parts affecting emission control, the owner should assure himself/herself that such parts are warranted by their manufacturer to be equivalent to genuine GM parts in performance and durability.

* “Genuine GM parts,” when used in connection with GM chassis means parts manufactured by or for GM, designed for use on GM chassis, and distributed by any division or subsidiary of GM.

Page 15

Maintenance and Repairs

Maintenance and repairs can be performed by any qualiﬁed service outlet; however, warranty repairs must be performed by an authorized dealer except in an emergency situation when a warranted part or a warranty station is not reasonably available to the chassis owner.

In an emergency, where an authorized dealer is not reasonably available, repairs can be performed at any available service establishment or by the owner, using any replacement part. GM will consider reimbursement for the expense incurred (including diagnosis), not to exceed the manufacturer’s suggested retail price for all warranted parts replaced and labor charges based on GM’s recommended time allowance for the warranty repair and the geographically appropriate labor rate. A part not being available within 10 days or a repair not being completed within 30 days constitutes an emergency. Retain receipts and failed parts in order to receive compensation for warranty repairs reimbursable due to an emergency.

If, in an emergency situation, it is necessary to have repairs performed by other than a GM dealer and you believe the repairs are covered by emission warranties, take the replaced parts and your receipt to a GM dealer for reimbursement consideration. This applies to both the Federal Emission Defect Warranty and Federal Emission Performance Warranty.

Receipts and records covering the performance of regular maintenance or emergency repairs should be retained in the event questions arise concerning maintenance. These receipts and records should be transferred to each subsequent owner. GM will not deny warranty coverage solely on the absence of maintenance records. However, GM may deny a warranty claim if a failure to perform scheduled maintenance resulted in the failure of a warranty part.

Page 16

Claims Procedure

As with the other warranties covered in the separate warranty booklet, take your chassis to any authorized GM dealer facility to obtain service under the emission warranty. This should be done as soon as possible after failing an EPA-approved I/M test or a California smog check test, or at any time you suspect a defect in a part.

Those repairs qualifying under the warranty will be performed by any GM dealer at no charge. Repairs which do not qualify will be charged to you. You will be notiﬁed as to whether or not the repair qualiﬁes under the warranty within a reasonable time (not to exceed 30 days after receipt of the chassis by the dealer, or within the time period required by local or state law).

The only exceptions would be if you request or agree to an extension, or if a delay results from events beyond the control of your dealer or GM. If you are not so notiﬁed, GM will provide any required repairs at no charge.

In the event a warranty matter is not handled to your satisfaction, refer to the “Customer Satisfaction Procedure” in the warranty booklet under “Owner Assistance”.

For further information or to report violations of the Emission Control System Warranty, contact the EPA at:

Manager, Certiﬁcation and Compliance Division (6405J) Warranty Claims Environmental Protection Agency Ariel Rios Building 1200 Pennsylvania Avenue, N.W. Washington, DC 20460

For a chassis subject to the California Exhaust Emission Standards, contact:

State of California Air Resources Board Mobile Source Operations Division P.O. Box 8001 El Monte, CA 91731-2990

Page 17

How to Use This Manual

Many people read the owner manual from beginning to end when they ﬁrst receive their new vehicle to learn about the vehicle’s features and controls. Pictures and words work together to explain things.

Index

A good place to quickly locate information about the vehicle is the Index in the back of the manual. It is an alphabetical list of what is in the manual and the page number where it can be found.

Safety Warnings and Symbols

There are a number of safety cautions in this book. A box with the word CAUTION is used to tell about things that could hurt you or others if you were to ignore the warning.

{CAUTION:

These mean there is something that could hurt you or other people.

We tell you what the hazard is and what to do to help avoid or reduce the hazard. Please read these cautions. If you do not, you or others could be hurt.

A circle with a slash through it is a safety symbol which means “Do Not,” “Do Not do this” or “Do Not let this happen.”

Page 18

Vehicle Damage Warnings

You will also ﬁnd notices in this manual.

Notice: These mean there is something that could damage your vehicle.

A notice tells about something that can damage the vehicle. Many times, this damage would not be covered by your vehicle’s warranty, and it could be costly. The notice tells 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.

There are also warning labels on the vehicle which use the same words, CAUTION or NOTICE.

Vehicle Symbols

The vehicle has components and labels that use symbols instead of text. Symbols are shown along with the text describing the operation or information relating to a speciﬁc component, control, message, gage, or indicator.

If you need help ﬁguring out a speciﬁc name of a component, gage, or indicator, reference the following topics:

• Seats and Restraint Systems in Section 1

• Features and Controls in Section 2

• Instrument Panel Overview in Section 3

• Climate Controls in Section 3

• Warning Lights, Gages, and Indicators in

Section 3

• Audio System(s) in Section 3

• Engine Compartment Overview in Section 5

Page 19

These are some examples of symbols that may be found on the vehicle:

Page 20

✍ NOTES

Page 21

Front Seats ................................................... 22

Manual Seats .............................................. 22

Manual Lumbar ........................................... 23

Reclining Seatbacks .................................... 24

Air Suspension Seats .................................. 26

Center Seat ................................................ 27

Safety Belts .................................................. 28

Safety Belts: They Are for Everyone ........... 28

Questions and Answers About

Safety Belts ............................................. 32

How to Wear Safety Belts Properly ............. 32

Driver Position ............................................. 33

Shoulder Belt Height Adjustment ................. 40

Safety Belt Use During Pregnancy .............. 41

Right Passenger Position ............................ 41

Center Passenger Position .......................... 42

Safety Belt Extender ................................... 43

Child Restraints ............................................ 43

Older Children ............................................. 43

Infants and Young Children ......................... 46

Child Restraint Systems ..............................50

Lower Anchors and Tethers for

Children (LATCH) .................................... 54

Securing a Child Restraint in Your

Medium Duty Vehicle ............................... 55

Restraint System Check ............................... 56

Checking the Restraint Systems .................. 56

Replacing Restraint System Parts

After a Crash ........................................... 57

Section 1 Seats and Restraint Systems

Page 22

Front Seats

Manual Seats

Your vehicle has bucket seats. You can adjust the driver’s seat with these levers located at the front of the seat.

{CAUTION:

You can lose control of the vehicle if you try to adjust a manual driver’s seat while the vehicle is moving. The sudden movement could startle and confuse you, or make you push a pedal when you do not want to. Adjust the driver’s seat only when the vehicle is not moving.

Page 23

Slide lever (A) to the left to unlock the seat and slide the seat to where you want it. Release the lever and try to move the seat with your body to make sure the seat is locked into place.

To adjust the lower seat cushion forward or backward, pull up on lever (B) and slide the cushion to where you want it. Then release the lever.

Manual Lumbar

To get more support in the lumbar area of your back, turn the lumbar adjustment knob. The knob is located on the inboard side of the driver’s seatback and the outboard side of the passenger’s seatback.

Page 24

Reclining Seatbacks

{CAUTION:

To tilt the seatback, turn the reclining knob. The knob is located on the outboard side of both seats.

Page 25

{CAUTION:

Sitting in a reclined position when your vehicle is in motion can be dangerous. Even if you buckle up, your safety belts cannot do their job when you are reclined like this.

The shoulder belt cannot do its job. In a crash, you could go into it, receiving neck or other injuries.

The lap belt cannot do its job either. In a crash the belt could go up over your abdomen. The belt forces would be there, not at your pelvic bones. This could cause serious internal injuries.

For proper protection when the vehicle is in motion, have the seatback upright. Then sit well back in the seat and wear your safety belt properly.

Do not have a seatback reclined if the vehicle is moving.

Page 26

Air Suspension Seats

Your vehicle may have an air suspension seat. There are two ways you can adjust the seat.

Height Adjustment

The height adjustment is controlled by the air suspension valve. The lever for the valve is located on the outboard side of the driver’s seat.

Pull the lever up to raise the seat. Push the lever down to lower the seat.

Isolator Lock Lever

The lever is located on the inboard side of the driver’s seat.

Move the handle down to lock the seat in place. This is used to reduce backslap experienced while in tractor/trailer operation or while operating a dump truck.

Lever shown in the

Locked Position

Page 27

Center Seat

Your vehicle may have a center seat. To fold the seatback down, pull the lever, located

on the right side of the seat. Then lower the seatback forward and push down

ﬁrmly to lock in position. A storage compartment is located on the rear of the seatback for use when the seatback is in the fully lowered position.

Push the lever on the right side of the seat and pull on the seatback when you are ready to raise it.

{CAUTION:

If the seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatback to be sure it is locked.

Page 28

Safety Belts

Safety Belts: They Are for Everyone

This part of the manual tells you how to use safety belts properly. It also tells you some things you should not do with safety belts.

{CAUTION:

Do not let anyone ride where he or she cannot wear a safety belt properly. If you are in a crash and you are not wearing a safety belt, your injuries can be much worse. You can hit things inside the vehicle or be ejected from it. You can be seriously injured or killed. In the same crash, you might not be, if you are buckled up. Always fasten your safety belt, and check that your passengers’ belts are fastened properly too.

{CAUTION:

It is extremely dangerous to ride in a cargo area, inside or outside of a vehicle. In a collision, people riding in these areas are more likely to be seriously injured or killed. Do not allow people to ride in any area of your vehicle that is not equipped with seats and safety belts. Be sure everyone in your vehicle is in a seat and using a safety belt properly.

Your vehicle has a light that comes on as a reminder to buckle up. See Safety Belt

Reminder Light on page 121.

Page 29

In most states and in all Canadian provinces, the law says to wear safety belts. Here is why: They work.

You never know if you will be in a crash. If you do have a crash, you do not know if it will be a bad one.

A few crashes are mild, and some crashes can be so serious that even buckled up, a person would not survive. But most crashes are in between. In many of them, people who buckle up can survive and sometimes walk away. Without belts they could have been badly hurt or killed.

After more than 40 years of safety belts in vehicles, the facts are clear. In most crashes buckling up does matter... a lot!

Why Safety Belts Work

Q: Aren’t safety belts for kids? A: Yes. And they are for adult truckers, and

anyone else who rides in your vehicle.

Here is why: when your vehicle goes, say, 30 mph (50 km/h), so do you and your passengers.

Page 30

If the vehicle hits something, it stops – right then. But nothing stops the people. They keep moving.

Then something will stop them. It could be the windshield.

Page 31

Or it could be the instrument panel. Now, what if you and your passengers were to

give that big vehicle a chance to deal with the force of the impact, instead of you?

With safety belts, you slow down as the vehicle does. You get more time to stop.

You stop over more distance, and your strongest bones take the forces. Safety belts are for everyone.

Page 32

Questions and Answers About Safety Belts

Q: Will I be trapped in the vehicle after an

accident if I am wearing a safety belt?

A: You could be — whether you are wearing a

safety belt or not. But you can unbuckle a safety belt, even if you are upside down. And your chance of being conscious during and after an accident, so you can unbuckle and get out, is much greater if you are belted.

Q: If I am a good driver, and I never drive far

from home, why should I wear safety belts?

A: You may be an excellent driver, but if you are

in an accident — even one that is not your fault — you and your passengers can be hurt. Being a good driver does not protect you from things beyond your control, such as bad drivers.

Most accidents occur within 25 miles (40 km) of home. And the greatest number of serious injuries and deaths occur at speeds of less than 40 mph (65 km/h).

Safety belts are for everyone.

How to Wear Safety Belts Properly

This part is only for people of adult size. Be aware that there are special things to know

about safety belts and children. And there are different rules for smaller children and babies. If a child will be riding in your vehicle, see Older

Children on page 43 or Infants and Young Children on page 46. Follow those rules for everyone’s

protection. First, you will want to know which restraint

systems your vehicle has. We will start with the driver position.

Page 33

Driver Position

Lap-Shoulder Belt

The driver has a lap-shoulder belt. Here is how to wear it properly.

1. Close and lock the door.

2. Adjust the seat so you can sit up straight. To see how, see “Seats” in the Index.

3. Pick up the latch plate and pull the belt across you. Do not let it get twisted.

The lap-shoulder belt may lock if you pull the belt across you very quickly. If this happens, let the belt go back slightly to unlock it. Then pull the belt across you more slowly. There is a clip on the lap portion of the lap-shoulder belt. Make sure this clip is not too close to the latch plate when you wear your safety belt, so you can make the belt snug.

4. Push the latch plate into the buckle until it clicks.

Pull up on the latch plate to make sure it is secure. If the belt is not long enough, see Safety Belt Extender on page 43.

Make sure the release button on the buckle is positioned so you would be able to unbuckle the safety belt quickly if you ever had to.

5. Move the shoulder belt height adjuster to the height that is right for you. Improper shoulder belt height adjustment could reduce the effectiveness of the safety belt in a crash. See Shoulder Belt Height Adjustment on page 40.

Page 34

6. To make the lap part tight, pull up on the shoulder belt.

It may be necessary to pull stitching on the safety belt through the latch plate to fully tighten the lap belt on smaller occupants.

The lap part of the belt should be worn low and snug on the hips, just touching the thighs. In a crash, this applies force to the strong pelvic bones. And you would be less likely to slide under the lap belt. If you slid under it, the belt would apply force at your abdomen. This could cause serious or even fatal injuries. The shoulder belt should go over the shoulder and across the chest. These parts of the body are best able to take belt restraining forces.

The safety belt locks if there is a sudden stop or crash.

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Q: What is wrong with this?

A: The shoulder belt is too loose. It will not give

nearly as much protection this way.

{CAUTION:

You can be seriously hurt if your shoulder belt is too loose. In a crash, you would move forward too much, which could increase injury. The shoulder belt should ﬁt against your body.

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Q: What is wrong with this?

A: The lap belt is too loose. It will not give nearly

as much protection this way.

{CAUTION:

You can be seriously hurt if your lap belt is too loose. In a crash, you could slide under the lap belt and apply force at your abdomen. This could cause serious or even fatal injuries. The lap belt should be worn low and snug on the hips, just touching the thighs.

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Q: What is wrong with this?

A: The belt is buckled in the wrong place.

{CAUTION:

You can be seriously injured if your belt is buckled in the wrong place like this. In a crash, the belt would go up over your abdomen. The belt forces would be there, not at the pelvic bones. This could cause serious internal injuries. Always buckle your belt into the buckle nearest you.

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Q: What is wrong with this?

A: The shoulder belt is worn under the arm.

It should be worn over the shoulder at all times.

{CAUTION:

You can be seriously injured if you wear the shoulder belt under your arm. In a crash, your body would move too far forward, which would increase the chance of head and neck injury. Also, the belt would apply too much force to the ribs, which are not as strong as shoulder bones. You could also severely injure internal organs like your liver or spleen.

Page 39

Q: What is wrong with this?

A: The belt is twisted across the body.

{CAUTION:

You can be seriously injured by a twisted belt. In a crash, you would not have the full width of the belt to spread impact forces. If a belt is twisted, make it straight so it can work properly, or ask your dealer/retailer to ﬁx it.

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To unlatch the belt, push the button on the buckle. The belt should go back out of the way.

Before you close the door, be sure the belt is out of the way. If you slam the door on it, you can damage both the belt and your vehicle.

Shoulder Belt Height Adjustment

Before you begin to drive, move the shoulder belt height adjuster to the height that is right for you.

Adjust the height so that the shoulder portion of the belt is centered on your shoulder. The belt should be away from your face and neck, but not falling off your shoulder. Improper shoulder belt height adjustment could reduce the effectiveness of the safety belt in a crash.

To move it down, press in at the top of the arrows and move the height adjuster to the desired position. You can move the height adjuster up just by pushing up on the shoulder belt guide.

After you move the height adjuster to where you want it, try to move it down without pressing in to make sure it has locked into position.

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Safety Belt Use During Pregnancy

Safety belts work for everyone, including pregnant women. Like all occupants, they are more likely to be seriously injured if they do not wear safety belts.

A pregnant woman should wear a lap-shoulder belt, and the lap portion should be worn as low as possible, below the rounding, throughout the pregnancy.

The best way to protect the fetus is to protect the mother. When a safety belt is worn properly, it is more likely that the fetus will not be hurt in a crash. For pregnant women, as for anyone, the key to making safety belts effective is wearing them properly.

Right Passenger Position

The right passenger’s safety belt works the same way as the driver’s safety belt. See Driver Position on page 33.

Page 42

Center Passenger Position

Lap Belt

If your vehicle has a center seat, someone can sit in the center position.

When you sit in a center seating position, you have a lap safety belt, which has no retractor. To make the belt longer, tilt the latch plate and pull it along the belt.

To make the belt shorter, pull its free end as shown until the belt is snug.

Buckle, position and release it the same way as the lap part of a lap-shoulder belt. If the belt is not long enough, see Safety Belt Extender on page 43.

Make sure the release button on the buckle is positioned so you would be able to unbuckle the safety belt quickly if you ever had to.

Page 43

Safety Belt Extender

If the vehicle’s safety belt will fasten around you, you should use it.

But if a safety belt is not long enough, your dealer/retailer will order you an extender. When you go in to order it, take the heaviest coat you will wear, so the extender will be long enough for you. To help avoid personal injury, do not let someone else use it, and use it only for the seat it is made to ﬁt. The extender has been designed for adults. Never use it for securing child seats. To wear it, attach it to the regular safety belt. For more information, see the instruction sheet that comes with the extender.

Child Restraints

Older Children

Older children who have outgrown booster seats should wear the vehicle’s safety belts.

If you have the choice, a child should sit next to a window so the child can wear a lap-shoulder belt and get the additional restraint a shoulder belt can provide.

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Q: What is the proper way to wear safety

belts?

A: If possible, an older child should wear a

lap-shoulder belt and get the additional restraint a shoulder belt can provide. The shoulder belt should not cross the face or neck. The lap belt should ﬁt snugly below the hips, just touching the top of the thighs. It should never be worn over the abdomen, which could cause severe or even fatal internal injuries in a crash.

According to accident statistics, children are safer when properly restrained in the rear seating positions than in the front seating positions.

In a crash, children who are not buckled up can strike other people who are buckled up, or can be thrown out of the vehicle. Older children need to use safety belts properly.

{CAUTION:

Never do this. Here two children are wearing the same

belt. The belt cannot properly spread the impact forces. In a crash, the two children can be crushed together and seriously injured. A belt must be used by only one person at a time.

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Q: What if a child is wearing a lap-shoulder

belt, but the child is so small that the shoulder belt is very close to the child’s face or neck?

A: Move the child toward the center of the

vehicle, but be sure that the shoulder belt still is on the child’s shoulder, so that in a crash the child’s upper body would have the restraint that belts provide.

If the child is so small that the shoulder belt is still very close to the child’s face or neck, you might want to place the child in a seat that has a lap belt, if your vehicle has one.

{CAUTION:

Never do this. Here a child is sitting in a seat that has a

lap-shoulder belt, but the shoulder part is behind the child. If the child wears the belt in this way, in a crash the child might slide under the belt. The belt’s force would then be applied right on the child’s abdomen. That could cause serious or fatal injuries.

Wherever the child sits, the lap portion of the belt should be worn low and snug on the hips, just touching the child’s thighs. This applies belt force to the child’s pelvic bones in a crash.

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Infants and Young Children

Everyone in a vehicle needs protection! This includes infants and all other children. Neither the distance traveled nor the age and size of the traveler changes the need, for everyone, to use safety restraints. In fact, the law in every state in the United States and in every Canadian province says children up to some age must be restrained while in a vehicle.

{CAUTION:

Children can be seriously injured or strangled if a shoulder belt is wrapped around their neck and the safety belt continues to tighten. Never leave children unattended in a vehicle and never allow children to play with the safety belts.

Every time infants and young children ride in vehicles, they should have the protection provided by appropriate restraints. Young children should not use the vehicle’s adult safety belts alone, unless there is no other choice. Instead, they need to use a child restraint.

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{CAUTION:

People should never hold a baby in their arms while riding in a vehicle. A baby does not weigh much — until a crash. During a crash a baby will become so heavy it is not possible to hold it. For example, in a crash at only 25 mph (40 km/h), a 12 lb (5.5 kg) baby will suddenly become a 240 lb (110 kg) force on a person’s arms. A baby should be secured in an appropriate restraint.

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Q: What are the different types of add-on

child restraints?

A: Add-on child restraints, which are purchased by

the vehicle’s owner, are available in four basic types. Selection of a particular restraint should take into consideration not only the child’s weight, height, and age but also whether or not the restraint will be compatible with the motor vehicle in which it will be used.

For most basic types of child restraints, there are many different models available. When purchasing a child restraint, be sure it is designed to be used in a motor vehicle. If it is, the restraint will have a label saying that it meets federal motor vehicle safety standards.

The restraint manufacturer’s instructions that come with the restraint state the weight and height limitations for a particular child restraint. In addition, there are many kinds of restraints available for children with special needs.

{CAUTION:

Newborn infants need complete support, including support for the head and neck. This is necessary because a newborn infant’s neck is weak and its head weighs so much compared with the rest of its body. In a crash, an infant in a rear-facing seat settles into the restraint, so the crash forces can be distributed across the strongest part of an infant’s body, the back and shoulders. Infants always should be secured in appropriate infant restraints.

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{CAUTION:

The body structure of a young child is quite unlike that of an adult or older child, for whom the safety belts are designed. A young child’s hip bones are still so small that the vehicle’s regular safety belt may not remain low on the hip bones, as it should. Instead, it may settle up around the child’s abdomen. In a crash, the belt would apply force on a body area that is unprotected by any bony structure. This alone could cause serious or fatal injuries. Young children always should be secured in appropriate child restraints.

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Child Restraint Systems

An infant car bed (A), a special bed made for use in a motor vehicle, is an infant restraint system designed to restrain or position a child on a continuous ﬂat surface. Make sure that the infant’s head rests toward the center of the vehicle.

A rear-facing infant seat (B) provides restraint with the seating surface against the back of the infant. The harness system holds the infant in place and, in a crash, acts to keep the infant positioned in the restraint.

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A forward-facing child seat (C-E) provides restraint for the child’s body with the harness and also sometimes with surfaces such as T-shaped or shelf-like shields.

A booster seat (F-G) is a child restraint designed to improve the ﬁt of the vehicle’s safety belt system. Some booster seats have a shoulder belt positioner, and some high-back booster seats have a ﬁve-point harness. A booster seat can also help a child to see out the window.

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Q: How Should I Use a Child Restraint? A: A child restraint system is any device designed

for use in a motor vehicle to restrain, seat, or position children. A built-in child restraint system is a permanent part of the motor vehicle. An add-on child restraint system is a portable one, which is purchased by the vehicle’s owner. To help reduce injuries, an add-on child restraint must be secured in the vehicle. With built-in or add-on child restraints, the child has to be secured within the child restraint.

When choosing an add-on child restraint, be sure the child restraint is designed to be used in a vehicle. If it is, it will have a label saying that it meets federal motor vehicle safety standards. Then follow the instructions for the restraint. You may ﬁnd these instructions on the restraint itself or in a booklet, or both.

Securing an Add-on Child Restraint in the Vehicle

{CAUTION:

A child can be seriously injured or killed in a crash if the child restraint is not properly secured in the vehicle. Make sure the child restraint is properly installed in the vehicle using the vehicle’s safety belt, following the instructions that came with that restraint, and also the instructions in this manual.

To help reduce the chance of injury, the child restraint must be secured in the vehicle. Child restraint systems must be secured in vehicle seats by lap belts or the lap belt portion of a lap-shoulder belt. A child can be endangered in a crash if the child restraint is not properly secured in the vehicle.

Page 53

When securing an add-on child restraint, refer to the instructions that come with the restraint which may be on the restraint itself or in a booklet, or both, and to this manual. The child restraint instructions are important, so if they are not available, obtain a replacement copy from the manufacturer.

Keep in mind that an unsecured child restraint can move around in a collision or sudden stop and injure people in the vehicle. Be sure to properly secure any child restraint in your vehicle — even when no child is in it.

Securing the Child Within the Child Restraint

There are several systems for securing the child within the child restraint. One system, the three-point harness, has straps that come down over each of the infant’s shoulders and buckle together at the crotch. The ﬁve-point harness system has two shoulder straps, two hip straps, and a crotch strap. A shield may take the place of hip straps. A T-shaped shield has shoulder straps that

are attached to a ﬂat pad which rests low against the child’s body. A shelf- or armrest-type shield has straps that are attached to a wide, shelf-like shield that swings up or to the side.

{CAUTION:

A child can be seriously injured or killed in a crash if the child is not properly secured in the child restraint. Make sure the child is properly secured, following the instructions that came with that restraint.

Because there are different systems, it is important to refer to the instructions that come with the restraint. A child can be endangered in a crash if the child is not properly secured in the child restraint.

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Lower Anchors and Tethers for Children (LATCH)

Some child restraints have a LATCH system. As part of the LATCH system, your child restraint may have lower attachments and/or a top tether. The LATCH system can help hold the child restraint in place during driving or in a crash. Some vehicles have lower and/or top tether anchors designed to secure a child restraint with lower attachments and/or a top tether.

Some child restraints with a top tether are designed to be used whether the top tether is anchored or not. Other child restraints require that the top tether be anchored. A national or local law may require that the top tether be anchored.

In Canada, the law requires that forward-facing child restraints have a top tether, and that the tether be attached.

Your vehicle does not have lower anchors or top tether anchors to secure a child restraint with the LATCH system. If a national or local law requires that your top tether be anchored, do not use a child restraint in this vehicle because a top tether cannot be properly anchored. You must use the safety belts to secure your child restraint in this vehicle, unless a national or local law requires that the top tether be anchored. Refer to your child restraint instructions and instructions in this manual for securing a child restraint using the vehicle’s safety belts.

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Securing a Child Restraint in Your Medium Duty Vehicle

We know securing a child can present real problems in a medium-duty vehicle like yours. The only place where you can properly secure a child restraint is the center seating position, the place that has the lap belt only. But your vehicle may not have a center seating position. Or, even if you have one, you may ﬁnd that the child restraint keeps you from operating the shift lever or other controls. The only answer may be to have the smaller children make the trip in another vehicle, where they can get to protection they need.

If your vehicle has a center seat, you can secure a child restraint here.

You will be using the lap belt. Be sure to follow the instructions that came with the child restraint. Secure the child in the child restraint when and as the instructions say. But do not use this position if the child restraint interferes with shifting gears.

There are no top tether anchors in this vehicle. Do not secure a child seat in this vehicle if a national or local law requires that the top tether be anchored, or if the instructions that come with

the restraint say that the top tether must be anchored. See Lower Anchors and Tethers for Children (LATCH) on page 54 if the child restraint has one.

1. Make the belt as long as possible by tilting the latch plate and pulling it along the belt.

2. Put the child restraint on the seat.

3. Run the vehicle’s safety belt through or around the restraint. The child restraint instructions will show you how.

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4. Buckle the belt. Make sure the release button is positioned so you would be able to unbuckle the safety belt quickly if you ever had to.

5. To tighten the belt, pull its free end while you push down on the child restraint. If you are using a forward-facing child restraint, you may ﬁnd it helpful to use your knee to push down on the child restraint as you tighten the belt.

6. Push and pull the child restraint in different directions to be sure it is secure.

To remove the child restraint, just unbuckle the vehicle’s safety belt. It will be ready to work for an adult or larger child passenger.

Restraint System Check

Checking the Restraint Systems

Now and then, make sure the safety belt reminder light and all your belts, buckles, latch plates, retractors, and anchorages are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. See Care of Safety Belts on page 270 for more information.

Torn or frayed safety belts may not protect you in a crash. They can rip apart under impact forces. If a belt is torn or frayed, get a new one right away.

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Replacing Restraint System Parts After a Crash

{CAUTION:

A crash can damage the restraint systems in your vehicle. A damaged restraint system may not properly protect the person using it, resulting in serious injury or even death in a crash. To help make sure your restraint systems are working properly after a crash, have them inspected and any necessary replacements made as soon as possible.

If you have had a crash, do you need new belts? After a very minor collision, nothing may be

necessary. But if the belts were stretched, as they would be if worn during a more severe crash, then you need new parts.

If belts are cut or damaged, replace them. Collision damage also may mean you will need to have safety belt or seat parts repaired or replaced. New parts and repairs may be necessary even if the belt was not being used at the time of the collision.

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✍ NOTES

Page 59

Keys .............................................................. 60

Doors and Locks .......................................... 61

Door Locks ................................................. 61

Windows ....................................................... 62

Power Windows .......................................... 63

Passenger Side Door Glass ........................64

Starting and Operating Your Vehicle ........... 65

New Vehicle Break-In .................................. 65

Ignition Positions ......................................... 66

Starting the Diesel Engine ........................... 66

Engine Alarm and Automatic Shutdown ....... 69

High Idle System ......................................... 70

Exhaust Restrictor ....................................... 70

Engine Checks Before Operating ................. 71

Engine Coolant Heater ................................ 73

Diesel Engine Exhaust Brake ...................... 74

Two-Speed Rear Axle

Electric Shift Control ................................ 75

Automatic Transmission Operation ............... 76

Automatic Transmission Third-Gear Hold ..... 77

Manual Transmission Operation ................... 77

Power Take-Off (PTO) ................................. 79

Parking ....................................................... 80

Parking Brake (With Hydraulic Brakes) ........ 81

Parking Brake (With Air Brakes) .................. 82

Parking Brake Burnish Procedure ................ 85

Air Suspension ............................................ 85

Parking Over Things That Burn ................... 86

Engine Exhaust ........................................... 86

Diesel Particulate Filter ................................ 87

Running the Engine While Parked ............... 92

Mirrors ........................................................... 93

Outside Manual Mirrors ............................... 93

Outside Convex Mirrors ............................... 93

Outside Heated Mirrors ............................... 94

Storage Areas ............................................... 94

Center Console Storage Area ...................... 95

Section 2 Features and Controls

Page 60

Keys

{CAUTION:

Leaving children in a vehicle with the ignition key is dangerous for many reasons, children or others could be badly injured or even killed. They could operate the power windows or other controls or even make the vehicle move. The windows will function with the keys in the ignition and they could be seriously injured or killed if caught in the path of a closing window. Do not leave the keys in a vehicle with children.

The key can be used for the ignition switch and all locks.

The key has a code on it that tells your dealer/retailer or a qualiﬁed locksmith how to make extra keys. Record and keep the key code in a safe place. If the key is lost, you can have a new one made using this code.

Notice: If you ever lock your keys in your vehicle, you may have to damage the vehicle to get in. Be sure you have spare keys.

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Doors and Locks

Door Locks

{CAUTION:

Unlocked doors can be dangerous.

• Passengers, especially children, can

easily open the doors and fall out of a moving vehicle. When a door is locked, the handle will not open it. You increase the chance of being thrown out of the vehicle in a crash if the doors are not locked. So, wear safety belts properly and lock the doors whenever you drive.

• Young children who get into unlocked

vehicles may be unable to get out. A child can be overcome by extreme heat and can suffer permanent injuries or even death from heat stroke. Always lock your vehicle whenever you leave it.

CAUTION: (Continued)

•

Outsiders can easily enter through an unlocked door when you slow down or stop your vehicle. Locking your doors can help prevent this from happening.

A manual door lock is located above each door handle.

To lock your door from the inside, push the manual lock in. To unlock the door, pull the manual lock out.

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When the doors are locked, they can’t be opened using the inside handles until the manual lock is pulled out.

Windows

{CAUTION:

Leaving children, helpless adults, or pets in a vehicle with the windows closed is dangerous. They can be overcome by the extreme heat and suffer permanent injuries or even death from heat stroke. Never leave a child, a helpless adult, or a pet alone in a vehicle, especially with the windows closed in warm or hot weather.

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Power Windows

If your vehicle has power windows, the switches for both windows are located on the driver’s door. In addition, the passenger door has a switch for its own window.

Press the rearward part of the switch to lower the window. Press the forward part of the switch to raise the window.

The power windows will operate when the ignition is in ACC or ON.

Power Window Lock Switch

Pressing the power window lock switch once locks the passenger side window and prevents it from opening or closing. Pressing the switch a second time unlocks the passenger side window.

Express-Down

The driver’s window has an express-down feature. This allows the window to be lowered fully without continuously holding the switch. Press the switch down fully to initiate the express-down feature. Press the top of the switch to stop the window from lowering.

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Passenger Side Door Glass

If your vehicle has this feature, the cover on the passenger’s side lower window will open so that the glass can be cleaned.

{CAUTION:

Never open the passenger side door glass with the ignition on. You can be injured if the window linkage moves. Open this glass only with the ignition off.

To open the window cover, pull on the latch at the rear of the window and swing the window cover open. When closing the window cover, push ﬁrmly at the latch to close completely.

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Starting and Operating Your Vehicle

New Vehicle Break-In

Notice: Your vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines:

• Let the engine warm up before you operate

your vehicle under load.

• Keep your speed at 55 mph (88 km/h) or

less for the ﬁrst 500 miles (805 km).

• Do not drive at any one speed, fast or

slow, for the ﬁrst 500 miles (805 km). Do not make full-throttle starts.

• Avoid making hard stops for the ﬁrst

200 miles (322 km) or so. During this time the new brake linings are not yet broken in. Hard stops with new linings can mean premature wear and earlier replacement. Follow this breaking-in guideline every time you get new brake linings.

• Use the lowest gear you can when you

start a loaded vehicle in motion and when going up hills to avoid overloading the engine.

• Check and adjust engine and transmission

ﬂuid levels often and be sure tires are properly inﬂated for the load you are carrying.

• When new, parking brake linings have not

yet been broken in. When linings are new, it is possible that the vehicle could move while the parking brake is applied. Before using the parking brake on grades, follow the parking brake burnish procedure. See Parking Brake Burnish Procedure on page 85.

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Ignition Positions

Use your ignition key to start your vehicle. You can turn the ignition switch to four different positions.

LOCK: This position allows you to insert and remove the ignition key.

ACC (Accessory): This position lets you use accessories when the engine is off.

ON: This is the position for driving. The battery could be drained if you leave the key

in the ACC or On position with the engine off. You may not be able to start your vehicle if the battery is allowed to drain for an extended period of time.

START: This position starts your engine.

Key In the Ignition

Never leave your vehicle with the keys inside, as it is an easy target for joy riders or thieves. If you leave the key in the ignition and park your vehicle, a chime will sound, when you open the driver’s door. Always remember to remove your key from the ignition and take it with you. This will lock your ignition and transaxle. Also, always remember to lock the doors.

The battery could be drained if you leave the key in the ignition while your vehicle is parked. You may not be able to start your vehicle after it has been parked for an extended period of time.

Starting the Diesel Engine

Automatic Transmission

Move the shift lever to PARK (P) or NEUTRAL (N). The engine will not start in any other position – that is a safety feature. To restart when the vehicle is already moving, use NEUTRAL (N) only.

Notice: Do not try to shift to PARK (P) if your vehicle is moving. If you do, you could damage the transmission. Shift to PARK (P) only when your vehicle is stopped.

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Manual Transmission

Move the shift lever to NEUTRAL (N) and hold the clutch pedal to the ﬂoor while starting the engine. Your vehicle will not start if the clutch pedal is not all the way down – that is a safety feature.

Starting Procedure

1. Turn your ignition key to ON. Observe the wait to start light. See Wait to

Start Indicator on page 129. This light may not come on if the engine is hot.

2. As soon as the wait to start light goes off, immediately turn the ignition key to START. When the engine starts, let go of the key.

Notice: Holding your key in START for longer than 15 seconds at a time will cause your battery to be drained much sooner. And the excessive heat can damage your starter motor.

Notice: If the wait to start indicator stays on after starting your vehicle, your vehicle may not run properly. Have your vehicle serviced right away.

3. If the engine does not start after 15 seconds of cranking, turn the ignition key to LOCK. Wait one minute for the starter to cool, then try the same steps again.

When your engine is cold, let it run for a few minutes before you move your vehicle. This lets oil pressure build up. Your engine will sound louder when it is cold.

Notice: If you are not in an idling vehicle and the engine overheats, you would not be there to see the overheated engine indication. This could damage your vehicle. Do not let your engine run when you are not in your vehicle.

Cold Weather Starting

The following tips will help you get good starting in cold weather.

Use the recommended engine oil when the outside temperature drops below freezing. See Engine Oil on page 206. When the outside temperature drops below 0°F (−18°C), use of the engine coolant heater is recommended.

See Engine Coolant Heater on page 73 for more information.

See What Fuel to Use on page 195 for information on what fuel to use in cold weather.

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If Your Engine Will Not Start

If you are not out of fuel, and your engine will not start, do this:

Turn your ignition key to ON. Immediately after the wait to start light goes off, turn the ignition key to START.

If the light does not go off, wait a few seconds, then try starting your engine again. And, see your dealer/retailer as soon as you can for a starting system check.

If the light comes on and then goes off and you know your batteries are charged, but your engine still will not start, your vehicle needs service.

If the light does not come on when the engine is cold, your vehicle needs service.

If your batteries do not have enough charge to start your engine, see Battery on page 235 for more information.

Be sure you have the right oil for your engine, and that you have changed the oil at the proper times. If you use the wrong oil, your engine may be harder to start. See Engine Oil on page 206 for more information.

Be sure you are using the proper fuel for existing weather conditions. See What Fuel to Use on page 195 What Fuel to Use.

If the engine starts, runs a short time, then stops, your vehicle needs service.

{CAUTION:

Do not use gasoline or starting aids, such as ether, in the air intake. They could damage your engine. There could also be a ﬁre, which could cause serious personal injury.

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Engine Alarm and Automatic Shutdown

For vehicle with this feature, the check gages light will come on if the system senses high engine temperature, and a low or high engine oil pressure. See Check Gages Warning Light on page 134 for more information. If a high engine temperature is detected, or if a low or high engine oil pressure is detected, a tone alarm sounds. The alarm and the light remains on until the condition is ﬁxed. If the engine temperature or oil pressure condition worsens, the tone alarm increases in frequency.

If the system senses there is low engine coolant, the alarm and the low coolant warning light comes on.

See Low Coolant Warning Light on page 129 for more information.

The alarm means that your engine will shut down. See Engine Shutdown Warning Light on page 132 for more information.

Pull off the road and shut off the engine. Do not start it until the vehicle is repaired. If the engine shuts down while you are still in traffic, the engine can be restarted for another 25-30 seconds of operation. The engine will not shut down until the vehicle speed is less than 5 mph (8 km/h).

Notice: If you try to operate the vehicle after the engine automatically shuts down, you may damage the vehicle. Have your vehicle repaired as soon as possible.

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High Idle System

Manual High Idle System

If your vehicle has this feature, the manual high idle button is located in the instrument panel. See Instrument Panel

Overview on page 100

Instrument Panel Overview for more information.

This system can be used to increase your engine idle speed whenever the following conditions are met:

• The brake pedal is not pressed.

• The vehicle is at a complete stop.

• The manual transmission clutch pedal is not

pressed or, the automatic transmission is in NEUTRAL (N) or PARK (P).

The manual high idle feature is activated by pressing the button on the instrument panel. When the button is pressed again, or any of the previous conditions are not met, manual high idle will be deactivated.

Exhaust Restrictor

If your vehicle is equipped with this feature, there is an exhaust restrictor valve located in the exhaust stream. The valve closes to provide back pressure to the engine for the purpose of warming the engine quickly.

The exhaust restrictor operates:

• while the engine is running.

• while the vehicle is not moving.

• while the accelerator, brake and clutch pedals

are not pressed on a manual transmission vehicle.

• while idling in cold temperatures.

• when the shift lever is in NEUTRAL (N) or

PARK (P) on an automatic transmission vehicle.

Page 71

On vehicles equipped with a diesel engine exhaust brake, the exhaust brake switch must be on. See Diesel Engine Exhaust Brake on page 74 for more information. The indicator in the exhaust brake switch will be lit when the exhaust restrictor is active. The exhaust brake indicator light in the center of the instrument panel will also be lit whenever the exhaust restrictor is active. See Exhaust Brake Indicator Light on page 133 for more information.

When the engine coolant temperature is below 149°F (65°C) and the outside temperature is below 50°F (10°C), the exhaust restrictor will come on within 60 seconds of starting the engine. After running the engine for an additional 10 seconds, the engine idle will increase.

The exhaust restrictor will shut off and engine idle will return to normal once the engine is warmed up, or the brake pedal is pressed.

Engine Checks Before Operating

When you have started your engine, let it run for 20 to 30 seconds before you put a load on the engine. But do not leave the vehicle while the engine is running.

Avoid unnecessary idling of diesel engine equipped vehicles.

If the engine idles too long, the temperature of the engine coolant will fall below the normal operating range. Low engine operating temperature causes several conditions which affect engine operation and reduce engine life.

The engine should be permitted to go through a warm-up period. Operate the vehicle at a minimum of 600 rpm during the warm-up period. During this period and during operation, the following observations should be made.

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During this warm-up period, check your warning lights and gages:

• If oil pressure does not begin to rise within

15 seconds of starting, stop the engine and ﬁnd the cause. See Oil Pressure Gage on page 130 for more information.

• If the engine coolant temperature gage needle

goes into the hot area on the gage, stop the engine and ﬁnd the cause of the overheating. See Engine Coolant Temperature Gage on page 128 for more information.

• If you have air brakes, the dual-needle air

pressure gage should read at least 115 psi (790 kPa) for both service systems before you try to move the vehicle. When air pressure is below 60 psi (420 kPa), the LOW AIR light will come on and you will hear a tone alarm. See Brake System Warning Light on page 124 for more information. If the pressure does not build up or drops during warm-up, stop the engine and ﬁnd the cause before you try to move the vehicle. Recommended air pressure before driving is 120 psi (830 kPa). See Air Pressure Gage on page 136 for more information.

• The charging system light should come on

when the ignition key is turned to ON or START and should go out when the engine is running above idle. If the light does not go out or comes back on during normal engine operation, have the charging system checked right away. (This light tells you if the generator is not charging; it does not reﬂect the condition of the battery.) See Charging System Light on page 122 for more information.

• The voltmeter charge indicator gage tells you

the condition of your battery’s charge. The gage should be in the center area during engine operation. The red area on the left indicates an undercharge condition; the red area on the right indicates an overcharge. If the gage is in either red area, have the battery and charging system checked right away. See Voltmeter Gage on page 122 for more information.

Notice: Do not allow the engine to operate at low idle for more than ﬁve minutes. This can cause low engine operating temperatures which can affect engine operation and reduce engine life. Engine idle speed should be increased to 1200 rpm whenever extended idle is required.

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Once started, the engine should be placed under load to allow the engine coolant temperature to reach 150°F (66°C) before shutting off the engine.

Engine Coolant Heater

Your vehicle may be equipped with this feature. In very cold weather, 0°F (–18°C) or colder,

the engine coolant heater can help. You will get easier starting and better fuel economy during engine warm-up. Usually, the coolant heater should be plugged in a minimum of four hours prior to starting your vehicle. At temperatures above 32°F (0°C), use of the coolant heater is not required. Your vehicle may also have an internal thermostat in the plug end of the cord. This will prevent operation of the engine coolant heater when the temperature is at or above 0°F (−18°) as noted on the cord.

To Use the Engine Coolant Heater

1. Turn off the engine.

2. Find the cord on the drivers side in the engine compartment.

3. Plug it into a normal, grounded 110-volt AC outlet.

{CAUTION:

Plugging the cord into an ungrounded outlet could cause an electrical shock. Also, the wrong kind of extension cord could overheat and cause a ﬁre. You could be seriously injured. Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord will not reach, use a heavy-duty three-prong extension cord rated for at least 15 amps.

4. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts. If you do not, it could be damaged.

How long should you keep the coolant heater plugged in? The answer depends on the outside temperature, the kind of oil you have, and some other things. Instead of trying to list everything here, we ask that you contact your dealer/retailer in the area where you will be parking your vehicle. The dealer/retailer can give you the best advice for that particular area.

Page 74

Diesel Engine Exhaust Brake

The exhaust brake is used to help slow the vehicle and may assist the vehicle’s foundation brakes. The use of the exhaust brake will assist the braking of the vehicle and prolong the life of the foundation brake lining material.

The exhaust brake button is located in the instrument panel.

Push the bottom of the button to turn the exhaust brake on. When you push the top of the switch, the exhaust brake will turn off.

There is an indicator light on the instrument panel similar to the symbol on the switch, that will come on when the exhaust brake is active. See Exhaust Brake Indicator Light on page 133 for more information.

When using the exhaust brake, the proper gear range selection is important. The exhaust brake will be most effective if the gear range selected is the lowest possible range that does not allow the engine rpm to exceed 2500 rpm.

If you have an automatic transmission and press this button, the transmission will downshift to a factory default setting of fourth gear. To change the default setting, or for more information on factory default settings, contact your dealer for assistance.

The accelerator and clutch pedals, on a manual transmission, must be released in order for the exhaust brake to engage.

Page 75

Two-Speed Rear Axle Electric Shift Control

The switch is located on the center console between the driver’s and passenger’s seats. See Instrument Panel Overview on page 100 for more information.

While the switch is up, the rear axle is in the high range. Push it down to get the low range.

To operate off-road or under a heavy load, shift into low range while the vehicle is standing still and then operate the transmission normally.

On the highway, with the rear axle in low range and the transmission in top gear, you can shift the rear axle to high range by raising the switch and releasing the accelerator momentarily. Reapply the accelerator after you shift.

Under light load conditions, ﬁrst shift the rear axle into the high range with the vehicle at a standstill and then operate the transmission normally.

Page 76

Automatic Transmission Operation

GM builds vehicles with ﬁve and six-speed automatic transmissions. This part of the manual covers the basics of these. With these transmissions, you will ﬁnd an Allison

Transmission Operator’s Manual in your vehicle that goes into more detail. On the headliner, in front of and above the driver, or in some other place near the driver, you will see a label that describes important operating facts about the automatic transmission in your vehicle. Make sure you follow the instructions on this label.

{CAUTION:

It can be dangerous to get out of your vehicle without the parking brake ﬁrmly set. Your vehicle can roll. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle will not move, even when you are on fairly level ground, always set the parking brake.

{CAUTION:

Shifting into a drive gear while the engine is running at high speed is dangerous. Unless your foot is ﬁrmly on the brake pedal, your vehicle could move very rapidly. You could lose control and hit people or objects. Do not shift into a drive gear while your engine is running at high speed.

Overdrive Defeat

If your vehicle has this feature, you can select to limit the transmission to fourth gear. This may be useful when operating at a higher Gross Vehicle Weight (GVW) or where operating conditions do not require ﬁfth gear.

Page 77

The overdrive defeat button is located in the instrument panel to the right of the steering column.

See Instrument Panel Overview on page 100 for more information.

Press the button to turn on the overdrive defeat. Press the button again to turn off the overdrive defeat. The indicator light in the button will come on whenever overdrive defeat is active.

Automatic Transmission Third-Gear Hold

If your vehicle has this feature, your range selector has a 2-3 position. You cannot shift up to the next higher gear when the transmission is in this position unless your engine-governed speed is exceeded, such as when going downhill.

This feature is used for certain load and traffic conditions or when plowing snow. See the Allison

Transmission Operator’s Manual in your vehicle for more information about this.

Manual Transmission Operation

Using the Clutch

When you are starting to move the vehicle, it is important to begin with the engine speed at idle. Then start to engage the clutch and listen for an engine speed drop of about 100 rpm. At this point, the clutch is engaging, so you should increase the engine speed and fully engage the clutch.

Notice: If you increase the engine speed before the clutch is fully engaged, you could damage your transmission. Always allow the clutch to fully engage before increasing engine speed.

Page 78

Six-Speed Transmission

The transmission has gears that automatically synchronize when you shift up or down. Choose the gear which will maintain the road speed you want while keeping the engine above two-thirds of the governed speed. When the engine speed drops below two-thirds of the governed speed, shift into the next lower gear before your engine begins to become sluggish. When you shift down, be sure to double-clutch if required.

See “Double Clutching” later in this section.

Eaton®Fuller®Nine and Ten-Speed Non-Synchronized Manual Transmissions

If your vehicle has one of these non-synchronized transmissions, it is naturally somewhat complicated.

The following are driving tips:

• Always choose an initial starting gear suitable

for the load and terrain.

• Always use double-clutching procedures when

shifting.

• Never move the range shift lever to the LO

speed gear position after HI range preselection, or anytime the transmission is in the HI range.

• Never move the range knob or lever with the

shift lever in NEUTRAL while the vehicle is moving.

• Never make a range shift while moving in

REVERSE (R).

Page 79

Double-Clutching

You must use the double-clutching method when you shift an unsynchronized gear set. Disengage the clutch, shift to neutral and engage the clutch. When upshifting, slow the engine until the engine rpm and road speed match. When downshifting, accelerate the engine until the engine rpm and road speed match. Then quickly disengage the clutch and move the shift lever to the next gear position and engage the clutch.

Clutch Brake (Vehicles with Non-Synchronized Transmission)

A clutch brake is used to stop transmission input shaft turning so that FIRST (1) or REVERSE (R) gear selection can be initiated when the vehicle is at a standstill and the engine is idling.

Press the clutch pedal all the way down to the ﬂoorboard to apply the clutch brake.

When using the clutch brake, disengage the clutch pedal and shift the transmission into either the initial starting gear or REVERSE (R). If the tooth-butting occurs between the clutching teeth, re-engage the clutch while applying light pressure to the shift lever. This will provide for a smooth shift into either FIRST (1) or REVERSE (R) gear.

Notice: Using the clutch brake for shifting into any gear other than FIRST (1) or REVERSE (R) may cause premature wear of the clutch brake and make gear shift effort more difficult. Do not use the clutch brake for shifting after engaging FIRST (1) or REVERSE (R).

Power Take-Off (PTO)

Your vehicle may be equipped with power take-off (PTO). The PTO switch is located on the instrument panel.

An indicator in the switch comes on to show PTO is active.

Page 80

A PTO is a gearbox or mechanical device used to transmit mechanical power from the powertrain, through gears or a transmission, to another mechanical or hydraulic device. Before using a PTO, refer to the manufacturer’s or installer’s instructions.

Parking

{CAUTION:

If you do not park your vehicle properly, it can roll. If you have left the engine running, it can move very quickly. You or others could be injured. To be sure your vehicle will not move, even when you are on level ground, follow the steps below.

Parking a Vehicle With the Two-Speed Rear Axle

1. With the engine running, shift the two-speed rear axle into low. To be sure it is in low, you will need to move the vehicle in gear just a little.

2. Hold the regular brake pedal down with your right foot.

3. Apply the parking brake. See Parking Brake

(With Hydraulic Brakes) on page 81 or Parking Brake (With Air Brakes) on page 82

for parking brake apply procedure.

4. Shift the transmission to NEUTRAL for manual transmission or PARK (P) for automatic transmission.

Page 81

Parking Brake (With Hydraulic Brakes)

If your vehicle has hydraulic brakes, it has a parking brake lever. The lever is located in the center console.

Your vehicle may also be equipped with an automatic transmission which has a center console shift lever. This lever will have a PARK (P) position on the shift indicator. Even when PARK (P) is selected, be sure to apply the parking brake ﬁrmly so the vehicle will not move.

To apply the parking brake, pull the lever all the way up. The park brake light will come on when the parking brake is applied. See Brake System Warning Light on page 124 for more information. Then shift the transmission to NEUTRAL for a manual transmission or PARK (P) for an automatic transmission. The vehicle must be stationary when applying the parking brake, except while burnishing the parking brake linings. See Parking Brake Burnish Procedure on page 85 for more information.

Once the parking brake is applied, slowly remove your foot from the regular brake pedal, while checking to see if the vehicle moves. If the vehicle does start to move, press the regular brake pedal and follow the parking brake burnish procedures. See Parking Brake Burnish Procedure on page 85 for more information.

If your parking brake still does not set, take your vehicle dealer/retailer for service.

Page 82

To release the parking brake, ﬁrst push down the regular brake pedal. Then, while pressing in the release button, push the parking brake lever all the way down and shift the transmission to NEUTRAL. The parking brake light will stay on if the parking brake is not fully released.

Notice: Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Verify that the parking brake is fully released and the brake warning light is off before driving.

Parking Brake (With Air Brakes)

If your vehicle has air brakes, you will have this parking brake. It is located above the radio on the instrument panel.

Pulling it out applies the parking brake. The parking brake light will come on when the air parking brake is applied.

Page 83

Vehicles built for use as tractors or towing vehicles have two air brake controls. They look like this:

{CAUTION:

When the yellow PARKING BRAKE and the red TRAILER AIR SUPPLY knobs are both pushed in, your rig will be free to move. It could strike someone or something. When both of these knobs are pushed in, hold the regular brake pedal down to keep your rig from moving.

To charge a trailer’s air brake system do the following:

1. Move your vehicle into the proper position.

2. Apply the parking brake by pulling the yellow parking brake knob out.

3. Hook up the trailer air system properly.

4. Get into the vehicle.

5. Push and hold down the regular brake pedal.

6. Push in both the yellow parking brake and the red trailer air supply knobs. This will charge your trailer’s air system.

After a few minutes, the trailer system should be fully charged. When it is, the air pressure gage will show about 125 to 135 psi (862 to 931 kPa). See Air Pressure Gage on page 136 for more information.

Page 84

For driving with a trailer, the yellow and red, if equipped, knobs must be pushed in. When you are not pulling a trailer, the red trailer air supply knob must be pulled out.

{CAUTION:

If you apply any one of the air brake parking controls while the vehicle is moving, your rig will stop suddenly. If you are not ready for this, you or others could be injured. Do not apply any one of these controls while you are driving, unless you have to make an emergency stop.

If the air pressure drops below 60 to 70 psi (413 to 482 kPa), the primary brake light and warning buzzer will come on. If the air pressure drops to 35 to 45 psi (241 to 310 kPa), the red trailer air supply knob will automatically pop out and apply the spring brakes on the trailer.

If the air pressure drops to 35 to 45 psi (241 to 310 kPa), the yellow park brake knob will automatically pop out and apply the spring brakes on the truck or tractor.

If you ever have a complete loss of air so that your air brakes automatically apply, there is a way that the tow operator can release the parking brakes to tow the vehicle. See Towing Your Vehicle on page 182.

Page 85

Parking Brake Burnish Procedure

All vehicles which have hydraulic brakes will have a parking brake. It is recommended that the parking brake be burnished as part of the new vehicle break-in. The parking brake will work best after it has been burnished following these instructions:

1. Making sure that there is no other traffic around, get the vehicle speed up to 20 mph (32 km/h) and pull up to apply the parking brake. Let the vehicle come to a complete stop. Apply the base brakes and disengage the parking brake.

2. Repeat the burnishing procedure in Step 1 a total of 10 times

3. Between stops, drive the vehicle about 2

⁄2miles (4 km)

Notice: Driving with the parking brake on can damage the transmission and brake system parts. Verify that the parking brake is fully released and the brake warning light is off before driving.

Air Suspension

Your vehicle may have the Hendrickson HAS Series single-axle air suspension which is designed for a single-axle on-highway use. This feature is available in 19,000 lb (8 613.3 kg), 21,000 lb (9 525.4 kg) and 23,000 lb (10 432.6 kg) capacities.

Rear Air Suspension Dump Control

If your vehicle is equipped with the Hendrickson HAS Series single-axle air suspension, you may have this control. The air suspension dump control allows the operator to lower the deck height approximately 4.5 inches (11.5 cm) from the normal frame height.

The switch to deﬂate and inﬂate the air suspension is located on the instrument panel.

Page 86

Press the bottom of the switch to deﬂate the air suspension and lower the deck height. Press the top of the switch to return the suspension to normal deck height.

An indicator light will come on and stay on whenever the switch is in the dumped position.

Parking Over Things That Burn

{CAUTION:

Things that can burn could touch hot exhaust parts under your vehicle and ignite. Do not park over papers, leaves, dry grass, or other things that can burn.

Engine Exhaust

{CAUTION:

Engine exhaust can kill. It contains the gas carbon monoxide (CO), which you cannot see or smell. It can cause unconsciousness and death.

CAUTION: (Continued)

Page 87

CAUTION: (Continued)

You might have exhaust coming in if:

• The exhaust system sounds strange

or different.

• Your vehicle gets rusty underneath.

• Your vehicle was damaged in a

collision.

• Your vehicle was damaged when

driving over high points on the road or over road debris.

• Repairs were not done correctly.

• Your vehicle or the exhaust system

has been modiﬁed improperly.

If you ever suspect exhaust is coming into your vehicle:

• Drive it only with all the windows

down to blow out any CO; and

• Have your vehicle ﬁxed immediately.

Diesel Particulate Filter

Your vehicle has a Diesel Particulate Filter (DPF) as part of the exhaust system to reduce vehicle emissions. The DPF requires a unique exhaust tailpipe with an exhaust cooler. The exhaust cooler mixes air with the exhaust at the tailpipe. This lowers the exhaust temperature before it leaves the tailpipe.

The DPF, the tailpipe, or other exhaust system components must not be altered. The area where the exhaust cooler connects to the tailpipe should be inspected, especially the area where the fresh air enters the cooler. Make sure the openings are not restricted or plugged with mud or dirt which could inhibit exhaust gas cooling. See “Exhaust System Inspection” under At Least Twice a Year on page 316.

Page 88

The DPF will regenerate (self-clean) itself as part of normal operation. During regeneration, the green DPF indicator is lit and you will notice a difference in engine noise and engine speed, but this is normal. The Engine Control Module (ECM) controls this function based on several factors including the amount of fuel consumed, hours of engine operation and miles driven.

Notice: Use of diesel fuel other than Ultra Low Sulfur Diesel (15 ppm sulfur maximum) or engine oil other than low ash CJ-4 oil will cause permanent damage to the DPF and related components. This damage would not be covered by your warranty.

Your DPF equipped vehicle has speciﬁc fuel and engine oil requirements. See What Fuel to Use on page 195 and Engine Oil on page 206 to make sure you use the required fuel and engine oil.

{CAUTION:

During DPF regeneration, the exhaust system and exhaust gases are very hot. Things that burn could touch hot exhaust parts under your vehicle and ignite. You or others could be burned. Do not park near or over papers, leaves, dry grass, or other things that can burn.

When the yellow DPF indicator comes on, the ﬁlter is dirty and DPF regeneration is necessary. When driving continues without regeneration, the DPF indicator will change from yellow to red. Continuing to drive the vehicle with the red indicator can cause ﬁlter damage.

Page 89

To clean the ﬁlter, either drive the vehicle above 30 mph (50 km/h) to activate the automatic regeneration or stop the vehicle and perform the manual regeneration procedure. For the automatic regeneration, drive until the green DPF indicator light goes off. This will take approximately 20 minutes. Once automatic regeneration has started, drive until the green indicator light goes off to complete the regeneration in a single operation if possible.

During regeneration, the green DPF indicator light will come on. See Diesel Particulate

Filter Warning Light on page 136.

Notice: Extended idle should be avoided because the DPF system is not capable of regenerating at idle. During extended idle, be sure to watch for the DPF warning light/message which could come on to indicate that the DPF is becoming full and needs regeneration. If the light/message comes

on, stop the idling and drive the vehicle as described previously to clean the ﬁlter. Continued idling with the warning light/message on could cause irreversible damage to the DPF requiring repair and possible replacement that might not be covered by your warranty.

Extended idling in PARK (P) can cause exhaust parts and gases to become very hot. Keep the exhaust area clear of material that could ignite or burn. See Parking Over Things That Burn on page 86 for more information.

For vehicles with Power Take-Off (PTO), monitor the instrument panel cluster for lights related to the DPF.

All engines consume some amount of engine oil. This is normal. The by-product of combustion of engine oil is ash. The ash will become trapped in the DPF over the life of the vehicle. Eventually, the buildup of ash will restrict the exhaust gases and the DPF will need to be cleaned or replaced.

See Accessories and Modiﬁcations on page 191 for important information.

Page 90

Manual Regeneration Procedure

{CAUTION:

During DPF regeneration, the exhaust system and exhaust gases are very hot. Stay clear of the tailpipe area and do not park over things that burn. You or others could be burned or your vehicle could catch ﬁre. See Parking Over Things That Burn on page 86.

If the yellow or red DPF indicator is on, you can clean the DPF by performing a manual regeneration.

When it is safe to do so, stop the vehicle. Perform manual DPF regeneration in a well ventilated area. Manual DPF regeneration must be performed outdoors, as follows. Once manual regeneration is started, complete the regeneration in a single operation if possible. If manual regeneration is not

completed, as indicated by the green DPF indicator going off, in a single operation, automatic regeneration might not be allowed until the vehicle is stopped and manual regeneration is performed until completed.

1. Check engine oil and engine coolant levels to be sure they are at proper operating levels.

2. To prevent running out of fuel during regeneration, make sure there is at least a quarter of a tank of fuel.

3. Check to make sure the area near the exhaust tailpipe and under the exhaust system is clear of any materials that could catch ﬁre. Keep people away from the area of the exhaust system and exhaust gases.

4. Fully set the parking brake.

5. Shift the transmission to PARK (P) or NEUTRAL (N).

6. Idle the engine. If you used the idling control knob to increase the engine speed, restore it all the way to the left to reduce the engine speed.

Page 91

7. If the vehicle has Power Take Off (PTO), turn the PTO off. See Power Take-Off (PTO) on page 79.

8. Press the DPF switch on the instrument panel. See Instrument Panel Overview on page 100. The green DPF indicator light comes on, the exhaust gas control valve operates, engine idle speed automatically increases, and DPF regeneration begins. Do not leave the vehicle unattended during manual regeneration.

9. When the green DPF indicator light goes off, regeneration is completed. Regeneration is normally completed in about 30 minutes.

Under certain operating conditions, manual regeneration might not be able to be performed, even if the soot level in the DPF requires regeneration. This can occur because of low coolant temperature, low battery voltage, or high exhaust temperature or immediately after starting the vehicle. When manual regeneration is requested, by pressing the DPF switch, when coolant temperature is low, the exhaust restrictor is engaged, the exhaust brake light comes on, and engine rpm increases to help raise engine coolant temperature. When operating conditions allow, the green DPF indicator will come on to indicate that regeneration has started.

Page 92

Running the Engine While Parked

It is better not to park with the engine running. But if you ever have to, here are some things to know.

{CAUTION:

Idling the engine with the climate control system off could allow dangerous exhaust into your vehicle. See the earlier caution under Engine Exhaust on page 86.

Also, idling in a closed-in place can let deadly carbon monoxide (CO) into your vehicle even if the climate control fan is at the highest setting. One place this can happen is a garage. Exhaust — with CO — can come in easily. NEVER park in a garage with the engine running.

Another closed-in place can be a blizzard. See Winter Driving on page 174.

{CAUTION:

It can be dangerous to get out of your vehicle if the automatic transmission shift lever is not fully in PARK (P) with the parking brake ﬁrmly set. Your vehicle can roll. Do not leave your vehicle when the engine is running unless you have to. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle will not move, even when it is on fairly level ground, always set the parking brake and move the automatic transmission shift lever to PARK (P), or the manual transmission shift lever to NEUTRAL.

Follow the proper steps to be sure your vehicle will not move.

Page 93

Mirrors

Outside Manual Mirrors

Adjust the outside rearview mirrors so you can see a little of the side of your vehicle, and the area beside your vehicle from a comfortable driving position. Some mirrors can be folded in to enter narrow passageways.

If the mirrors have the clearance lamps, they will be on when the headlamps or parking lamps are on.

Outside Convex Mirrors

{CAUTION:

A convex mirror can make things (like other vehicles) look farther away than they really are. If you cut too sharply into the right or left lane, you could hit a vehicle. Check your regular outside mirrors (or your inside mirror, if you have one) before changing lanes.

Your vehicle may have convex mirrors on both the driver’s side and the passenger’s side. They are curved to allow more to be seen from the driver’s seat. A convex mirror can make things look farther away than they really are.

Page 94

Outside Heated Mirrors

For vehicles with this feature, the switch is located on the instrument panel.

Press the switch to turn the outside heated rearview mirrors on. The switch indicator light will come on and stay on whenever the outside heated rearview mirrors are activated.

Storage Areas

Overhead Storage

An overhead storage compartment is provided above each of the driver’s and passenger’s seats. To open push down on the inner button and lift the compartment doors all the way up to lock in position. Be sure the doors are securely closed before moving the vehicle.

Page 95

Center Seat Storage

A storage compartment is located behind the seatback in the center seat.

To access the compartment, you must ﬁrst pull down on the handle located on the passenger side to fold the seat all the way forward. To open, squeeze both sides of the latch.

Center Console Storage Area

There are additional storage areas for small items in the center console to the right of the driver’s seat.

Page 96

✍ NOTES

Page 97

Instrument Panel Overview ........................ 100

Hazard Warning Flashers .......................... 102

Other Warning Devices ............................. 102

Horn .......................................................... 102

Tilt Wheel .................................................. 102

Turn Signal/Multifunction Lever .................. 103

Turn and Lane-Change Signals ................. 104

Headlamp High/Low-Beam Changer .......... 104

Flash-to-Pass ............................................ 105

Windshield Wipers ..................................... 105

Windshield Washer .................................... 106

Cruise Control ........................................... 107

Headlamps ................................................ 110

Headlamps on Reminder ........................... 111

Daytime Running Lamps (DRL) ................. 111

Marker Lamps ........................................... 112

Instrument Panel Brightness ...................... 112

Dome Lamps ............................................. 112

Rear Reading Lamps ................................ 113

Auxiliary Power Jacks ................................ 113

Ashtray(s) and Cigarette Lighter ................ 114

Climate Controls ......................................... 114

Climate Control System ............................. 114

Outlet Adjustment ...................................... 116

Passenger Compartment Air Filter ............. 116

Warning Lights, Gages, and Indicators ..... 118

Instrument Panel Cluster ........................... 119

Speedometer and Odometer ...................... 120

Trip Odometer ........................................... 120

Tachometer ............................................... 120

Engine Speed Limiter ................................ 121

Safety Belt Reminder Light ........................ 121

Safety Belt Reminder Tone ....................... 121

Charging System Light ..............................122

Voltmeter Gage ......................................... 122

Service Transmission Warning Light .......... 123

Range Inhibit Warning Indicator ................. 124

Brake System Warning Light ..................... 124

Antilock Brake System Warning Light ........ 127

Trailer Antilock Brake System

Warning Light ........................................ 127

Traction Control System Active Light ......... 128

Section 3 Instrument Panel

Page 98

Engine Coolant Temperature Gage ............ 128

Low Coolant Warning Light ....................... 129

Wait to Start Indicator ............................... 129

Malfunction Indicator Lamp ........................ 130

Oil Pressure Gage ..................................... 130

Low Oil Level Light ................................... 131

Change Engine Oil Light ........................... 132

Engine Overspeed Warning Light .............. 132

Engine Shutdown Warning Light ................ 132

Exhaust Brake Indicator Light .................... 133

Differential Lock Indicator Light .................. 133

Reduced Engine Power Light .................... 133

Highbeam On Light ...................................134

Daytime Running Lamps (DRL)

Indicator Light ........................................ 134

Check Gages Warning Light ...................... 134

Fuel Gage ................................................. 135

Water in Fuel Warning Light ...................... 135

Diesel Particulate Filter Warning Light ....... 136

Air Pressure Gage ..................................... 136

Hourmeter Gage ........................................ 137

Audio System(s) ......................................... 137

Setting the Time ........................................ 138

AM-FM Radio ............................................ 139

Radio with Cassette .................................. 142

Radio Reception ........................................ 145

Care of the Cassette Tape Player ............. 146

Fixed Mast Antenna .................................. 146

Section 3 Instrument Panel

Page 99

✍ NOTES

Page 100

Instrument Panel Overview

100

GMC T-Series 2007 Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual