1994 GMC Sierra Owners Manual

I 191

O w n e r ' s M a n u a l

INTRODUCTION 1994 GMC Sierra Owner’s Manual Welcome This manual was prepared to acquaint you with the operation and maintenance of your 1994 GMC Sierra and to provide important safety information. There is also a GMC Truck Warranty and Owner Assistance Information booklet. In some vehicles, there can be information manuals from other manufacturers like body builders or special equipment companies. We urge you to review all these publications carefully. This will help you enjoy safe and trouble-free operation of your vehicle. When it comes to service, keep in mind that your dealer knows your vehicle best and is interested in your complete satisfaction. Your dealer invites you to return for all of your service needs both during and after the warranty period. Remember, if you have a concern and need help handling it to your satisfaction, see the procedure in the GMC Truck Warranty and Owner Assistance Information booklet. Thanks for choosing a GMC Truck product. We value you as a member of the GMC Truck family. We want to assure you of our continuing interest in your pleasure and satisfaction with your vehicle.

GMC Truck Division

General Motors Corporation

Pontiac, Michigan

@Copyright 1993 General Motors Corporation, GMC Truck Division.

All Rights Reserved

Second Edition

Printed in U.S.A.

Important Notes to Owners and Drivers . . . .About This Manual:

Please keep this manual in your vehicle so it will be there if you ever need it when you’re on the road. If you sell the vehicle, please leave this manual in it so the new owner can use it. This manual includes the latest information at the time it was printed. We reserve the right to make changes in the product after that time without further notice. For vehicles first sold in Canada, substitute the name “General Motors of Canada Limited” for GMC Truck Division whenever it appears in this manual.

For Canadian Owners Who Prefer a French Language Manual: Aux proprietaires canadiens: Vous pouvez vous procurer un exemplaire de ce guide en francais chez votre concessionaire ou au DGN Marketing Services Ltd., 1500 Bonhill Rd., Mississauga, Ontario L5T 1 C7.

I_ =l

GMCTRUCK

General Motors, GM, the GM Emblem, GMC and Sierra are registered trademarks of General Motors Corporation.

.. 11

Model Reference This manual covers these models:

REGULAR CAB PICKUP

EXTENDED CAB PICKUP

CREW CAB

CHASSIS CAB

3500 HD CHASSIS CAB

... 111

Table of Contents Introduction - How to Use this Manual

This section tells you how to use your manual and includes safety and vehicle damage warnings and symbols.

Section 1 - Seats and Safety Restraints

This section tells you how to use your seats and safety restraints properly.

Section 2 - Features & Controls

This section explains how to start and operate your Vehicle. Section 3 - Comfort Controls & Audio Systems

This section tells you how to adjust the ventilation and comfort controls and how to operate your audio system. Section 4 - Your Driving and the Road

Here you’ll find helpful information and tips about the road and how to drive under different conditions. Section 5 - Problems on the Road

This section tells you what to do if you have a problem while driving, such as a flat tire or engine overheating. Section 6 - Service & Appearance Care

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

Section 7- Schedule Maintenance Services

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

Section 8 - Customer Assistance Information

This section tells you how to contact your GM division for assistance and how to get service publications. It also gives you information on “Reporting Safety Defects” on page 8-4.

Index

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

iv

How to Use This Manual Many people read their owner’s manual from beginning to end when they first receive their new vehicle. This will help you learn about the features and controls for- your vehicle. In this manual, you’ll find that pictures and words work together to explain things quickly. INDEX: A good place to look for what you need is the Index in back of the manual. It’s an alphabetical list of all that’s in the manual, and the page number where you’ll find it. SECTION 1-6: Each section of this manual begins with a brief list of its contents, so you can often find at a glance if a section contains the information you want. SECTION 7: This section of the manual covers the maintenance required for your vehicle. SECTION 8 CUSTOMER ASSISTANCE: This section includes important information about reporting safety defects and gives you details about the “Roadside Assistance” program. You will also find customer satisfaction phone numbers (including customer satisfaction numbers for the hearing and speech impaired) as well as the mediation/arbitration procedure. We’ve also included ordering information for service publications in this part. Safety Warnings and Symbols You will find a number of safety cautions in this book. We use a box with gray background and the word CAUTION to tell you about things that could hurt you if you were to ignore the warning.

A CAUTION:

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

In the gray caution area, we tell you what the hazard is. Then we tell you what to do to help avoid or reduce the hazard. Please read these cautions. If you don’t, you or others could be hurt. You will also find a circle with a slash through it in this book. This safety symbol means “Don’t,’’ “Don’t do this,” or “Don’t let this happen.’’

Vehicle Damage Warnings Also, in this book you will find these notices:

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

In the notice area, we tell you about something that can damage your vehicle. Many times, this damage would not be covered by your warranty, and it could be costly. But the notice will tell you what to do to help avoid the damage. When you read other manuals, you might see CAUTION and NOTICE warnings in different colors or in different words. You’ll also see warning labels on your vehicle. They use yellow for cautions, blue for notices and the words CAUTION or NOTICE.

vi

Vehicle Symbols These are some of the symbols you will find on your vehicle. For example, these symbols are used on an original battery:

el

Caution

Possible Injury

Protect Eyes by Shielding

Caustic Battery Acid Could Cause Burns

Spark or Name Could

Explode Battery

Avoid Sparks or Flames

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

--

fasten Safety

Belts

Door LocWUnlock

vii

These symbols have to do with your lights:

Master Lighting

Switch

Turn Signal Direction

Hazard Warning

Flasher

Headlight High Beam

Parking Lights

Fog Lights

Daytime

Running Lights

Off

These symbols are on some of your controls:

Windshield

Wiper

Windshield

Washer

Windshield Defroster

Rear Window

Defogger

Ventilating Fan

Air Vents

... Vlll

These symbols are used on warning and indicator lights:

Engine Coolant Temperature

Battery Charging

System

Fuel

Engine Oil Pressure

RELEASE

Parking Brake

Release

SHIFT

Shift Light

Brake

Low

Coolant

Here are some other symbols you may see:

Fuse

Hood Release

Lighter

Horn

ix

Notes

Seats and Safety Belts

Section

Here you’ll find information about the seats in your vehicle and how to use your safety belts properly . You can also learn about some things you should not do with safety belts . Seats and Seat Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frontseats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RearSeats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Belts: They’re For Everyone . . . . . . . . . . . . . . . . . . . . . . . . . . . Why Safety Belts Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Questions Many People Ask About Safety Belts

. . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . How To Wear Safety Belts Properly Adults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Driver Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lap-Shoulder Belt Safety Belt Use During Pregnancy .......................... Passenger Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Smaller Children and Babies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Child Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Larger Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Belt Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Checking Your Restraint Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacing Your Safety Belts After a Crash . . . . . . . . . . . . . . . . . . . . . .

1-2 1-2 1-5 1-8 1-10 1-11 . . . . . . . 1-14 1-15 1-15 1-16 1-16 1-23 1-23 1-30 1-30 1-32 1-41 1-43 1-44 1-44

1-1

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

Front Seats

Manual Front Seat

If your vehicle has a manual bucket, split bench, or full bench seat, you can adjust it with this lever at the front of the seat.

Slide the lever at the front of the seat toward the outer seat support to unlock it. Using your body, slide the seat to where you want it. Then, release the lever and try to move the seat with your body, to make sure the seat is locked into place.

1-2

Power Seat

If your vehicle has a power seat on the driver's side, you can adjust it with this switch at the front of the seat.

You can use the center switch knob to move the seat where you want it. To raise the seat, move the center switch knob up. To lower the seat, move the center switch knob down. To move the seat forward, move the center switch knob toward the inside of the vehicle. To move the seat rearward, move the center knob toward the outside of the vehicle. You can also raise and lower the front and rear of the sear. I'o raise the front of the seat, move the inner switch lever up. To lower the .front of the seat, move the inner switch lever down. To raise the rear of the seat, move the outer switch lever up. To lower the rear of the seat, move the outer switch lever down.

Reclining Front Seatback (Bucket or Split Bench Seat)

To adjust the seatback. lift the front of this lever.

Release the lever to lock the seatback where you want it. Pull up on the front of the lever and the seatback will go to a11 upright position. Don't have a seatback reclined if your vehicle is moving.

1-3

1-4

Head Restraints

d the top of your ears.

This position reduces the chance of a neck injury in a crash.

Seatback Latches (Full Bench Seat) The front seatback folds forward to let you access the rear of the cab. Your seatback will move back and forth freely, unless you come to a sudden stop. Then it will lock in place. If you have a Crew Cab, your front seatback is designed not to fold forward. Access to the rear of the cab is available by using the rear doors.

Seatback Latches (Bench Seat With Armrest) The front seatback folds forward to let you access the rear of the cab. If you have a Crew Cab, your front seatback is designed not to fold forward. Access to the rear of the cab is available by using the rear doors.

To fold a seatback forward, pull this lever up and fold the seatback forward.

To return the seatback to the upright position, just push the seatback r e w a r d until it latches.

1-5

After returning the seatback to its upright position, pull the seatback forward to make sure it is locked.

Seatback Latches (Reclining Split Bench and Reclining Bucket Seafs) The front seatback folds forward to let you access the rear of the cab.

To fold the seatback forward, lift this lever. Lift the front of the lever and the seatback will fold forward. To return the seatback to the upright position, push the seatback rearward until it latches.

After returning the seatback to its upright position, pull the seatback forward to make sure it is locked.

Easy Entry Seat (Extended Cab Only) The driver and passenger front bucket seat and the 40/60 split bench seat of your vehicle has an easy entry feature. This makes it easy to get i n and out of the rear seat.

To operate the seat pull forward on the top of the lever, located at the side of the seatback, and tilt the back forward toward the front of the vehicle.

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

To return the seat to its regular position, return the seatback to its upright position, then push the whole seat rearward until it latches. After returning the seat to its regular position, try to move the seat with your body, to make sure the seat is locked into place.

1-7

Rear Seats

Rear Folding Seat (Extended Cab Models) The extended cab may have a rear folding seat which can be folded down for more seating space.

until it latches. .

To use the seat, pull the entire seat forward until it is flat. Pull forward on the RELEASE lever, under the right-hand side of the seat cushion. Push the seatback rearward

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

To store the seat, pull forward on the RELEASE lever, under the right-hand side of the seat cushion. Fold the seatback forward until it latches with the seat cushion. Lift the entire seat and push it rearward into place.

Make sure the seat is secure.

1-8

Rear Seat (Crew Cab) You can adjust the seat by sliding the adjuster lever at the front of the seat toward the seat support to unlock it. Slide the seat to where you want it. Then release the lever and try to move the seat with your body, to make sure the seat is locked into place.

Rear Seat Seatback Latch (Except Bench With Armrest) The rear seatback can be folded forward to let you reach the area behind it. Your seatback will move back and forth freely, unless you come to a sudden stop. Then, it will lock into place.

Rear Seat Seatback Latch (Bench Seat With Armrest) The rear seatback folds forward to let you access the area behind it.

To fold a seatback forward, pull this lever up and fold the seatback forward.

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

1-9

Safety Belts: They’re 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.

This figure lights up as a reminder to buckle up. (See “Safety Belt Reminder Light” in the Index.) It will light when you turn the key to RUN or START when your safety belt isn’t buckled, and you’ll hear a tone or buzzer, too. In many states and Canadian provinces, the law says to wear safety belts. Here’s why: They work. You never know if you’ll be in a crash. If you do have a crash, you don’t know if it will be a bad one.

1-10

A few crashes are mild, and some crashes can be so serious that even buckled up a person wouldn’t 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 25 years of safety belts in vehicles, the facts are clear. In most crashes buckling up does matter ... a lot!

Why Safety Belts Work When you ride in or on anything, you go as fast as it goes.

For example, if the bike is going 10 mph (16 lun/h), so is the child.

1-11

When the bike hits the block, it stops. But the child keeps going!

Take the simplest “vehicle.” Suppose it’s just a seat on wheels.

Put someone on it.

1-12

3 Get it up to speed. Then stop the “vehicle.” The rider doesn’t stop.

The person keeps going until stopped by something. In a real vehicle, it could be the windshield . . .

or the instrument panel ...

1-13

or the safety belts i

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. That’s why safety belts make such good sense. Here Are Questions Many People Ask About Safety Belts - and the Answers Q: Won’t I be trapped in the vehicle after an accident ifI’m wearing a

safety belt?

A: You could be - whether you’re wearing a safety belt or not. But you can easily unbuckle a safety belt, even if you’re 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 Why don’t they just put in air bags so people won’t have to wear

safety belts?

A: Air bags are in some vehicles today and will be in more of them in the future. But they are supplemental systems only - so they work with safety belts, not instead of them. Every air bag system ever offered for sale has required the use of safety belts. Even if you’re in a vehicle that has air bags. you still have to buckle up to get the most protection. That’s true not only in frontal collisions, but especially in side and other collisions.

1-14

Q : If I ’rn a good driver, and I never drive farjrom home, why should I

wear safety belts?

A: You may be an excellent driver, but if you’re in an accident - even

one that isn’t your fault - you and your passengers can be hurt. Being a good driver doesn’t 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.

Safety Beit Reminder Light

When the key is turned to “Run” or “Start,” a light will come on for about eight seconds to remind people to fasten their safety belts.

Unless the driver’s safety belt is already buckled, a tone will also sound. How To Wear Safety Belts Properly Adults This section 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 the section after this one, called “Children.” Follow those rules for everyone’s protection. First, you’ll want to know which restraint systems your vehicle has. We’ll start with the driver position.

1-15

Driver Position This section describes the driver’s restraint system.

Lap-Shoulder Belt

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

1. Close and lock the door. 2. Adjust the seat (to see how, see “Seats” in the Index) so you can sit up

straight.

1-16

3. Pick up the latch plate and pull the belt across you. (On some models, you may hear a clicking sound as the belt is pulled out. The clicking sound is the shoulder belt tension feature operating properly.) Don’t let the belt get twisted.

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 isn’t long enough, see “Safety Belt Extender” at the end of this section.

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. The lap part of the belt SI nould 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’d 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’s a sudden stop or a crash.

1-17

Q: What’s wrong with this?

A: The shoulder belt is too loose. It won’t give nearly as much protection

this way.

Q: What’s wrong with this?

A: The belt is buckled in the wrong place.

1-19

Q: What’s wrong with this?

A: The belt is over an armrest.

1-20

Q: What's wrong with this?

A: The shoulder belt is worn under the arm. It should be worn over the

shoulder at all times.

1-21

Q: What's wrong with this?

A: The belt is twisted across the body.

To unlatch the belt, just 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.

1-22

Safety Belt Use During Pregnancy

The best way to protect the fetus is to protect the mother. When a safety belt is worn properly, it’s more likely that the fetus won’t be hurt in a crash. For pregnant women, as for anyone, the key to making safety belts effective is wearing them properly. Right Front Passenger Position

The right front passenger’s safety belt works the same way as the driver’s safety belt. See “Driver Position,” earlier in this part. When the lap portion of the belt is pulled out all the way, it will lock. If it does, let it go back all the way and start again.

1-23

Center Passenger Position

Lap Belt If your vehicle has front and rear bench seats, someone can sit in the center positions.

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.

I

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 lapshoulder belt. If the belt isn’t long enough, see “Safety Belt Extender” at the end of this section. 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. Rear Seat Passengers (Extended Cab and Crew Cab) It’s very important for rear seat passengers to buckle up! Accident statistics show that unbelted people in the rear seat are hurt more often in crashes than those who are wearing safety belts. Rear passengers who aren’t safety belted can be thrown out of the vehicle in a crash. And they can strike others in the vehicle who are wearing safety belts.

Rear Seat Outside Passenger Positions (Extended Cab)

1-25

Lap-Shoulder Belt The positions next to the windows have lap-shoulder belts. Here’s how to wear one properly.

1. Pick up the latch plate and pull the belt across you. (On some models, you may hear a clicking sound as the belt is pulled out. The clicking sound is the shoulder belt tension feature operating properly.) Don’t let the belt get twisted.

2. Push the latch plate into the buckle until it clicks. If the belt stops

before it reaches the buckle, tilt the latch plate and keep pulling until you can buckle it. Pull up on the latch plate to make sure it is secure. If the belt is not long enough, see “Safety Belt Extender” at the end of this section. 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.

1-26

To make the lap part tight, pull down on the buckle end of the belt as you pull up on the shoulder part.

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’d 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’s a sudden stop or a crash.

To unlatch the belt, just push the button on the buckle.

, . .

1-27

Rear Seat Outside Passenger Positions (Crew Cab)

Lap-Shoulder Belt

belts. Here ’s how to

1. Pick up the latch plate and pull the belt across you. (On some models,

you may hear a clicking sound as the belt is pulled out. The clicking sound is the shoulder belt tension feature operating properly.) Don’t let the belt get twisted.

2. Push the latch plate into the buckle until it clicks. Pull up on the latch plate to make sure it is secure. When the lap belt is pulled out all the way, it will lock. If it does, let it go back all the way and start again. If the belt is not long enough, see “Safety Belt Extender” at the end of this section. 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.

1-28

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’d 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 only if there’s a sudden stop or a crash.

To unlatch the belt, just push the button on the buckle.

1-29

Children

Everyone in a vehicle needs protection! That includes infants and all children smaller than adult size.

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.

Smaller Children and Babies

1-31

Child Restraints Be sure to follow the instructions for the restraint. You may find these instructions on the restraint itself or in a booklet, or both. These restraints use the belt system in your vehicle, but the child also has to be secured within the restraint to help reduce the chance of personal injury. The instructions that come with the infant or child restraint will show you how to do that.

Where to Put the Restraint (Except Extended Cab and Crew Cab) The child restraint must be secured properly in the center or right front passenger seat.

Where to Put the Restraint (Extended Cab and Crew Cab) Accident statistics show that children are safer if they are restrained in the rear rather than the front seat. We at General Motors therefore recommend that you put your child restraint in the rear seat unless the child is an infant and you’re the only adult in the vehicle. In that case, you might want to secure the restraint in the front seat where you can keep an eye on the baby. Wherever you install it, be sure to secure the child restraint properly. 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. Top Strap

If your child restraint has a top strap, it should be anchored.

1-32

. .

. .

If you need to have an anchor installed, you can ask your dealer to put it in for you. If you want to install an anchor yourself, your dealer can tell you how to do it.

Securing a Child Restraint in a Rear Outside Position (Extended Cab)

You'll be using the lapshoulder belt. See the earlier section about the top strap if the child restraint has one. 1. Put the restraint on the seat. Follow the instructions for the child

restraint.

2. Secure the child in the child restraint as the instructions say. 3. Pull out the vehicle's safety belt. Make the belt as long as possible by

tilting the latch plate and pulling it along the belt.

4. Run the lap and

shoulder portions through or around the restraint. The child restraint instructions will show you how. If the shoulder belt goes in front of the child's face or neck, put it behind the child restraint.

1-33

5.

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.

6.

To tighten the belt, pull up on the shoulder belt while you push down on the child restraint. Make sure the buckle end of the belt is pulled out all the way.

7.

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 and let it go back all the way. The safety belt will move freely again and be ready to work for an adult or larger child passenger.

1-34

Securing a Child Restraint in a Rear Outside Position (Crew Cab)

You’ll be using the lap-shoulder belt. See the earlier section about the top strap if the child restraint has one. 1. Put the restraint on the seat. Follow the instructions for the child

restraint.

2. Secure the child in the child restraint as the instructions say. 3. Pick up the latch plate, and run the lap and shoulder portions of the

vehicle’s safety belt through or around the restraint. The child restraint instructions will show you how. If the shoulder belt goes in front of the child’s face or neck, put it behind the child restraint.

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.

1-35

5. Pull the rest of

the lap belt all the way out of the retractor to set the lock.

6. To tighten the

belt, feed the lap belt back into the retractor while you push down on the child restraint.

7. 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 and let it go back all the way. The safety belt will move freely again and be ready to work for an adult or larger child passenger.

1-36

Securing a Child Restraint in a Center Seat Position

When you secure a child restraint in a center seating position, you’ll be using the lap belt. See the earlier section about the top strap 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 restraint on the seat. Follow the instructions for the child

restraint.

3. Secure the child in the child restraint as the instructions say. 4. Run the vehicle’s safety belt through or around the restraint. The child

restraint instructions will show you how.

1-37

5. 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.

6. To tighten the belt, pull its free end while you push down on the child

restraint.

7. Push and pull the child restraint in different directions to be sure it is secure. If the child restraint isn't secure, turn the latch plate over and buckle it again. Then see if it is secure. If it isn't, secure the restraint in a different place in the vehicle and contact the child restraint maker for their advice about how to attach the child restraint properly.

To remove the child restraint, just unbuckle the vehicle's safety be.lt. It will be ready to work for an adult or larger child passenger. Securing a Child Restraint in the Right Front Seat

You'll be using the lap-shoulder belt. See the earlier section about the top strap if the child restraint has one.

1. Put the restraint on the seat. Follow the instructions for the child

restraint.

2. Secure the child in the child restraint as the instructions say.

1-38

3. Pick up the latch plate, and run the lap and shoulder portions of the

vehicle’s safety belt through or around the restraint. The child restraint instructions will show you how. If the shoulder belt goes in front of the child’s face or neck, put it behind the child restraint.

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. Pull the rest of

the lap belt all the way out of the retractor to set the lock.

1-39

6. To tighten the

belt, feed the lap belt back into the retractor while you push down on the child restraint.

7. 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 and let it go back all the way. The safety belt will move freely again and be ready to work for an adult or larger child passenger.

1-40

Larger Children

Children who have outgrown child restraints should we the vehicle’s safety belts.

.ar

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. Accident statistics show that children are safer if they are restrained in the rear seat. But they need to use the safety belts properly.

a Children who aren’t buckled up can be thrown out in a crash.

Children who aren’t buckled up can strike other people who are.

1-41

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.

1-42

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. Safety Belt Extender If the vehicle’s safety belt will fasten around you, you should use it. But if a safety belt isn’t long enough to fasten, your dealer will order you an extender. It’s free. When you go in to order it, take the heaviest coat you will wear, so the extender will be long enough for you. The extender will be just for you, and just for the seat in your vehicle that you choose. Don’t let someone else use it, and use it only for the seat it is made to fit. To wear it, just attach it to the regular safety belt.

1-43

Checking Your Restraint Systems Now and then, make sure all your belts, buckles, latch plates, retractors, anchorages and reminder systems are working properly. Look for any loose parts or damage. If you see anything that might keep a restraint system from doing its job, have it repaired. Replacing Safety Belts After a Crash If you’ve 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 belts. 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 wasn’t being used at the time of the collision. Q: What’s wrong with this?

A: The belt is torn. Torn or frayed 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. Before replacing any safety belt, see your dealer for the correct part number. You’ll need the model year and model number for your vehicle. The model year is on your title and registration. And you can find the model number on the CertificatiodTire label of your vehicle. See “CertificatiodTire Label” in the Index.

1-44

The model number on the replacement belt must be listed on the safety belt you want to replace. Pull the shoulder belt all the way out to see this label.

1-45

Notes

1-46

Features and Controls

Section .

Here you can learn about the many standard and optional features on your vehicle. and information on starting. shifting and braking . Also explained are the instrument panel and the warning systems that tell you if everything is working properly- and what to do if you have a problem . For explanation of vehicle symbols. refer to “Vehicle Symbols” in the Introduction . Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 DoorLocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Your Doors and How They Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Tailgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Theft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 New Vehicle “Break-In’’ Ignitionswitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 Starting Your Gasoline Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Starting Your Diesel Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 Automatic Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 Five-Speed Manual Transmission (With Low Gear) . . . . . . . . . . . . 2-24 (Without Low Gear) . . . . . . . . . . . . 2-25 Five-Speed Manual Transmission LockingRearAxle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 ParkingBrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 Parking Over Things That Burn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32

2-1

Four-WheelDrive

EngineExhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33 Running Your Engine While You’re Parked . . . . . . . . . . . . . . . . . . . 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34 Transfer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35 Front Axle Locking Feature ............................... 2-36 Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37 Horn .................................................... 2-39 TiltWheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39 Multifunction Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 Turn Signal and Lane Change Indicator ...................... 2-40 Headlight High-Low Beam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41 Windshield Wipers ...................................... 2-42 Windshield Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43 Cruise Control .......................................... 2-44 Headlights and Vehicle Lighting .............................. 2-49 Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54 SunVisors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55 Cigarette LightedAshtrays ................................... 2-57 Storage Compartments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58 Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67 Warning Lights and Indicators ............................. 2-69 Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78 Center High-Mount Stop Lamp (CHMSL) Feed Wire . . . . . . . . . . . . . 2-82 Camper Wiring Harness ..................................... 2-83 Trailer Wiring Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-83 Step Bumper Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84

2-2

Keys

The square-shaped key is for the ignition only.

2-3

The oval-shaped key is for the doors and all other locks.

When a new vehicle is delivered, the dealer removes the plugs from the keys, and gives them to the first owner. Each plug has a code on it that tells your dealer or a qualified locksmith how to make extra keys. Keep the plugs in a safe place. If you lose your keys, you’ll be able to have new ones made easily using these plugs.

NOTICE: Your vehicle has a number of new features that can help prevent theft. But you can have a lot of trouble getting into your vehicle if you ever lock your keys inside. You may even have to damage your vehicle to get in. So be sure you have extra keys.

2-4

Door Locks

There are several ways to lock and unlock your vehicle:

From the outside: Use your door key.

2-5

the

slide

door,

the

Power Door Locks (Option)

From the inside: To lock lever on your door down. To unlock the door, slide the lever up.

Press the bottom of the power door lock switch, marked LOCK, on either front door to lock all the doors at once. Press the switch marked UNLOCK to unlock all the doors at once.

On Crew Cab models, the switch on each rear door works only that door’s lock. It won’t lock (or unlock) all of the doors - that’s a safety feature. Leaving Your Vehicle If you are leaving the vehicle, take your keys, open your door and set the locks from inside. Then get out and close the door.

2-6

Your Doors and How They Work Side Doors

To open the door from the outside, pull the handle up and pull the door open.

To open the door from the inside, pull the lever toward you and push the door open.

2-7

Tailgate

You can open the tailgate by lifting up on its handle while pulling the tailgate toward you.

To shut the tailgate, firmly push it away from you into the latch. When you put the tailgate back up, pull it back towards you, to be sure that it latches securely.

Tailgate Removal The tailgate on your vehicle can be removed to allow for different loading situations. Although the tailgate can be removed without assistance, you may want someone to assist you with the removal to avoid possible finish damage. To remove the tailgate:

0 Raise the tailgate

slightly and release both retaining cable clips. To release the cable clips, lift the cable so it points straight out and push the cable clips forward.

With the tailgate at a slight upward angle, pull back on the tailgate at the right edge and then move the tailgate to the right, to release the left edge.

Reverse the above procedure to re-install. Make sure the tailgate is secure. Theft Vehicle theft is big business, especially in some cities. Although your vehicle has a number of theft deterrent features, we know that nothing we put on it can make it impossible to steal. However, there are ways you can help.

Key in the Ignition If you walk away from your vehicle with the keys inside, it’s an easy target for joy riders or professional thieves - so don’t do it. When you park your vehicle and open the driver’s door, you’ll hear a tone reminding you to remove your key from the ignition and take it with you. Always do this. Your steering wheel will be locked, and so will your ignition. If you have an automatic transmission, taking your key out also locks your transmission. And remember to lock the doors.

Parking at Night Park in a lighted spot, close all windows and lock your vehicle. Remember to keep your valuables out of sight. Put them in a storage area, or take them with you.

2-9

Parking Lots If you park in a lot where someone will be watching your vehicle, it’s best to lock it up and take your keys. But what if you have to leave your ignition key? What if you have to leave something valuable in your vehicle?

0 Put your valuables in a storage area or console. 0 Lock the console.

Lock all the doors except the driver’s.

0 Then take the door key with you. New Vehide “Break-In”

NOTICE: Your modern vehicle doesn’t need an elaborate “break-in.” But it will perform better in the long run if you follow these guidelines:

Keep your speed at 55 mph (88 km/h) or less for the first 500 miles- (804 km). Don’t drive at any one speed - fast or slow - for the first 500 miles (804 km). Don’t make full-throttle starts.

0 Avoid making hard stops for the first 200 miles (322 km) or

so. During this time your new brake linings aren’t 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.

New Vehicle “Break-In” - 3500 HD Model If you have a 3500 HD model, your parking brake requires a special break-in procedure. See “Parking Brake” in the Index.

Ignition Switch Use your square key to start your vehicle. The square key lets you turn the

ignition switch to five different positions: I 2 5 Q

1. OFF 2. RUN 3. START 4. ACC 5. LOCK

ACC (Accessory): ACC lets you use things like the radio and the windshield wipers when the engine is off. To get into ACC, push in the key and turn it toward you. Your steering wheel will remain locked, just as it was before you inserted the key. LOCK: This position locks your ignition, steering wheel and transmission. It's a theft deterrent feature. You will only be able to remove your key when the ignition is turned to LOCK. OFF: This position lets you turn off the engine but still turn the steering wheel. Use OFF if you must have your vehicle in motion while the engine is off (for example, if your vehicle is being pushed). RUN: This is the position for driving. START This starts your engine.

2-11

NOTICE: If your key seems stuck in “Lock” and you can’t turn it, be sure it is all the way in. If it is, then turn the steering wheel left and right while you turn the key hard. But turn the key only with your hand. Using a tool to force it could break the key or the ignition switch. If none of this works, then your vehicle needs service.

Key Release Lever

The ignition key cannot be removed from the ignition of manual transmission vehicles unless the key release lever is used.

this section

To Remove the Key On manual transmission vehicles, turn the key to the LOCK position while pressing the key release lever down (see the caution earlier in about the key release lever). Keeping your finger on the lever, pull the key straight out. On automatic transmission vehicles, turn the key to LOCK and pull it straight out. Starting Your Gasoline Engine If you have a diesel engine, see “Starting Your Diesel Engine” in the Index. Engines start differently. The 8th digit of your Vehicle Identification Number (VIN) shows the code letter or number for your engine. You will find the VIN at the top left of your instrument panel. (See “Vehicle Identification Number” in the Index.) Follow the proper steps to start the engine.

2-12

-..

Automatic Transmission: Move your shift lever to “ P ’ (Park) or “N” (Neutral). Your engine won’t start in any other position - that’s a safety feature. To restart when you’re already moving, use “N” (Neutral) only.

NOTICE: Don’t try to shift to “P” (Park) if your vehicle is moving. If you do, you could damage the transmission. Shift to “P” (Park) only when your vehicle is stopped.

Hold the clutch pedal to the tloor, then shift your gear selector to neutral while starting the engine. Your vehicle won’t start if the clutch pedal is not all the way down - that’s a safety feature. To start your 4.3 Liter (Code 2) V6 or 5.0L (Code H ) V8 engine: 1. Without pushing the accelerator pedal, turn your ignition key to “Start.”

When the engine starts, let go of the key. The idle speed will go down as your engine gets warm.

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.

2. If it doesn’t start right away, hold your key in “Start.” If it doesn’t start

in three seconds, push the accelerator pedal about one-quarter of the way down for 12 more seconds, or until it starts.

3. If your engine still won’t start (or starts but then stops), it could be

flooded with too much gasoline. Try this: Wait 15 seconds to let the starter motor cool down. Then push your accelerator pedal all the way to the tloor. Hold it there. Then, hold the key in “Start” for no more than ten seconds. This clears the extra gasoline from the engine. If the engine still doesn’t start, wait another 15 seconds and do it all again. When the engine starts, let go of the key and the accelerator pedal.

2- 13

NOTICE: Your engine is designed to work with the electronics in your vehicle. If you add electrical parts or accessories, you could change the way the fuel injection system operates. Before adding electrical equipment, check with your dealer. If you don’t, your engine might not perform properly. If you ever have to have your vehicle towed, see the part of this manual that tells how to do it without damaging your vehicle. See “Towing Your Vehicle” in the Index.

To start your 5.7 Liter (Code K ) or 7.4 Liter (Code N ) V8 engine: 1. Without pushing the accelerator pedal, turn your ignition key to “Start.”

When the engine starts, let go of the key. The idle speed will go down as your engine gets warm.

NOTICE:

I 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.

2. If it doesn’t start right away, hold your key in “Start.”

If it doesn’t start

in three seconds, push the accelerator pedal about one-quarter of the way down for 12 more seconds, or until it starts.

3. If your engine still won’t start (or starts but then stops),

it could be

flooded with too much gasoline. Try this: Wait 15 seconds to let the starter motor cool down. Then push your accelerator pedal all the way to the floor. Hold it there. Then hold the key in “Start” for no more than ten seconds. This clears the extra gasoline from the engine. If the engine still doesn’t start, wait another 15 seconds and do Step 3 again. Hot Engine Restart (Vehicles With 5.7L LO5 Engine and Over 8500 lbs. GVWR): If your engine is already hot and then stalls, turn your ignition key to OFF. Then, turn your key to RUN, and wait about 20 seconds before you restart your engine. When the engine starts, let go of the key and the accelerator pedal.

OFF. If your engine is already hot and then stalls, turn your ignition key to Then turn your key to “Run” and wait 20 seconds before you restart your engine. When the engine starts, let go of the key and the accelerator pedal.

2-14

NOTICE: Your engine is designed to work with the electronics in your vehicle. If you add electrical parts or accessories, you could change the way the fuel injection system operates. Before adding electrical equipment, check with your dealer. If you don’t, your engine might not perform properly. If you ever have to have your vehicle towed, see the part of this manual that tells how to do it without damaging your vehicle. See “Towing Your Vehicle” in the Index.

Driving Through Deep Standing Water

NOTICE: If you drive too quickly through deep puddles or standing water, water can come in through your engine’s air intake and badly damage your engine. If you can’t avoid deep puddles or standing water, drive through them very slowly.

Driving Through Water (Diesel Engines)

NOTICE: Never drive through standing water more than 8 inches deep if your vehicle has a diesel engine. Also, don’t drive through any standing water faster than 5 mph (8 km/h). If you do, water can be drawn in through the air intake, and this can severely damage your engine.

Driving In Snow (Diesel Engines) When driving in a heavy snowstorm or in swirling snow with a diesel engine, snow can get into the air intake system. If you keep driving in these conditions the air cleaner may get plugged, causing black smoke and loss of power. In an emergency, if the air cleaner gets plugged with snow, you can remove the air cleaner. Then, drive to a place of safety as soon as possible and put the air cleaner back on.

2- 15

Starting Your Diesel Englne Your diesel engine starts differently than a gasoline engine. 1. Automatic Transmission:

Move your shift lever to “P” (Park) or “N” (Neutral). Your engine won’t start in any other position - that’s a safety feature. To restart when you’re already moving, use “N” (Neutral) only.

NOTICE: Don’t try to shift to “P” (Park) if your vehicle is moving. If you do, you could damage the transmission. Shift to “P” (Park) only when your vehicle is stopped.

2. Manual Transmission:

Move your shift lever to neutral and hold the clutch pedal to the floor while starting the engine. Your vehicle won’t start if the clutch pedal is not all the way down - that’s a safety feature. Turn your ignition key to RUN. Don’t turn it to “Start.” With the ignition in RUN, the “GLOW PLUGS” light will come on. If the engine is already warm, this light may not come on. That’s normal. During starting, your “GLOW PLUGS” light may go on and off a few times. This is normal. This means that part of your engine is being warmed up for better starting. When the light goes off, your engine is ready to start. Do not start the engine with this light on.

NOTICE: If the “GLOW PLUGS” light stays on, it means that your vehicle could have one of several problems, so you should have it serviced right away.

3. If this light does not come on, or the instant the light goes off, turn your

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.

2-16

4. If the engine does not start after 15 seconds of cranking, turn the

ignition key to OFF. Wait one minute for the starter to. cool, then try the same steps again.

If you’re trying to start your engine after you’ve run out of fuel, follow the steps in “Running Out of Fuel” (see “Diesel Fuel Requirements and Fuel System” in the Index). 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’s cold.

I NOTICE:

If you’re not in an idling vehicle and the engine overheats, you wouldn’t be there to see the coolant temperature gage. This could damage your vehicle. Don’t let your engine run when you’re not in your vehicle.

Cold Weather Starting (Diesel Engine) The following tips will help you get good starting in cold weather. Use SAE 1OW-30 oil when the outside temperature drops below freezing. When the outside temperature drops below 0°F (- 1 SOC), use your engine coolant heater. If you park your vehicle in a garage, you shouldn’t need to use the coolant heater until the garage temperature goes below 0°F (-18OC), no matter how cold it is outside. To use the engine coolant heater, first turn off the engine. Then open the hood, unwrap the electrical cord and plug it in. It uses normal house voltage ( I 10 volts), but:

2-17

NOTICE: After you’ve used the coolant heater, be sure the manner it was, to help keep it away from moving engine parts. If you don’t, it could be torn and damaged.

to store the cord in

How long should you keep the coolant heater plugged in? The answer depends on the weather, the kind of oil you have, and some other things. Follow this chart.

Engine Coolant Heater Usage

Viscosity/ Oil Grade

32°F to 0°F (OOC to -1SOC)

0°F to -10°F

(-18” C to -23 O C)

Below -10°F Below -23 ” C

SAE 1 OW-30 SAE I5W-40

Not

Required

Not

Required

Two Hours* Two Hours*

Eight Hours* or Overnight Eight Hours”: or Overnight

*The times listed are minimum times. It will not harm either the coolant heater or the vehicle to leave the coolant heater plugged in longer than the times stated. For best results in cold weather, use Number I-D diesel fuel or a “winterized” Number 2-D fuel. lf Your Diesel Engine Won’t Start If you’ve run out of fuel, look at “Running Out of Fuel” (see “Diesel Fuel Requirements and Fuel System” in the Index). If you’re not out of fuel, and your engine won’t start, do this: Turn your ignition key to RUN. Make sure that the “GLOW PLUGS” light is out. Then turn the ignition key to START. If the light doesn’t go off, wait a few seconds, then try starting your engine again. And, see your dealer as soon as you can for a starting system check.

2- 18

If the light comes on and then goes off and you know your batteries are charged, but your engine still won’t start, your vehicle needs service. If the light does not come on when the engine is cold, your vehicle needs service. If your batteries don’t have enough charge to start your engine, see “Battery” in the Index. Be sure you have the right oil for your engine, and that you’ve changed the oil at the proper times. If you use the wrong oil, your engine may be harder to start. If the engine starts, runs a short time, then stops, your vehicle needs service.

1 A 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.

Engine Coolant Heater (Engine Block Heater)

In very cold weather, 0°F (-I 8°C) or colder, the engine coolant heater can help. You’ll 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.

2-19

To use the coolant heater: 1 . Turn off the engine. 2. Open the hood and unwrap the electrical cord. 3. Plug it into a normal, grounded 1 10-volt outlet.

NOTICE: After you’ve used the coolant heater, be sure to store the cord as it was before to keep it away from moving engine parts. If you don’t, it could be damaged.

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

2-20

Automatic Transmission

There are several different positions for your shift lever.

P (Park) This locks your rear wheels. It’s the best position your engine because your vehicle can’t move easily.

to use when you start

2-21

0 R (Reverse)

Use this gear to back up.

NOTICE: Shifting into “R” (Reverse) while your vehicle is moving forward could damage your transmission. Shift to “R” (Reverse) only after your vehicle is stopped.

To rock your vehicle back and forth to get out of snow, ice or sand without damaging your transmission, see “If Your Stuck: In Sand, Mud, Ice or Snow” in the Index. N (Neutral) In this position, your engine doesn’t connect with the wheels. To restart when you’re already moving, use “N” (Neutral) only. Also, use “N” (Neutral) when your vehicle is being towed.

NOTICE: Damage to your transmission caused by shifting out of “P” (Park) or “N” (Neutral) with the engine racing isn’t covered by your warranty.

2-22

@ (Automatic Overdrive) This position is for normal driving. If you need more power for passing, and you’re:

- Going less than about 35 mph (56 km/h), push your accelerator

pedal about halfway down.

- Going about 35 mph (56 k d h ) or more, push the accelerator all

the way down.

You’ll shift down to the next gear and have more power. @ should not be used when towing a trailer, carrying a heavy load, driving on steep hills, or for off road driving. Select “D”(third gear) when operating the vehicle under any of these conditions. D (Third Gear) This is like @, but you never go into Overdrive. You should use “D” when towing a trailer, carrying a heavy load, driving on steep hills, or for off-road driving. 2 (Second Gear) This position gives you more power but lower fuel economy. You can use “2” on hills. It can help control your speed as you go down steep mountain roads, but then you would also want to use your brakes off and on. If you manually select “2”, the transmission will drive in second gear. You may use this feature for reducing torque to the rear wheels when you are trying to start your vehicle from a stop on slippery road surfaces. 1 (First Gear) This position gives you even more power (but lower fuel economy) than “2.” You can use it on very steep hills, or in deep snow or mud. If the selector lever is put in “1 ,” the transmission won’t shift into first gear until the vehicle is going slowly enough.

b NOTICE:

If your rear wheels can’t rotate, don’t try to drive. This might happen if you were stuck in very deep sand or mud or were up against a solid object. You could damage your transmission. Also, if you stop when going uphill, don’t hold your vehicle there with only the accelerator pedal. This could overheat and damage the transmission. Use your brakes or shift into “P” (Park) to hold your vehicle in position on a hill.

2-23

Five-Speed Manual Transmission (With Low Gear)

This is your shift pattern. Here’s how to operate your transmission: L (Low Gear) is intended only for heavy loads and is not recommended for normal driving.

0 L (Low Gear) - Press the clutch pedal and shift into “L”. Then, slowly let up on the clutch pedal as you press the accelerator pedal. Shift into “L” only when the vehicle speed is below 5 mph (8 k d h ) . Tf you try to shift into “L” at excessive vehicle speeds, the shift lever will not move into the “L” position until vehicle speed is reduced.

0 1 (First Gear) - Press the clutch pedal and shift into “1.” Then,

slowly let up on the clutch pedal as you press the accelerator pedal. You can shift into “1” when you’re going less than 20 mph (32 km/h). If you’ve come to a complete stop and it’s hard to shift into “1,” put the shift lever in “N” (Neutral) and let up on the clutch. Press the clutch pedal back down. Then shift into “ I .” If you try to shift into “1” at excessive vehicle speeds, the shift lever will not move into the “1” position until vehicle speed is reduced.

0 2 (Second Gear) - Press the clutch pedal as you let up on the

accelerator pedal and shift into “2.” Then, slowly let up on the clutch pedal as you press the accelerator pedal.

0 Higher Gears - Shift into the higher forward gears the same way you

do for “2.” Slowly let up on the clutch pedal as you press the accelerator pedal. To Stop - Let up on the accelerator pedal and press the brake pedal. Just before the vehicle stops, press the clutch pedal and the brake pedal, and shift to “N” (Neutral).

0 N (Neutral) - Use this position when you start or idle your engine. R (Reverse) - To back up, first press down the clutch pedal. Wait 3-5 seconds for the internal parts to stop spinning and then, shift into “R.” Let up on the clutch pedal slowly while pressing the accelerator pedal.

2-24

NOTICE: Shift to “R” (Reverse) only after your vehicle is stopped. Shifting to “R” (Reverse) while your vehicle is moving could damage your transmission.

Also, use Reverse, along with the parking brake, when turning off your engine and parking your vehicle.

Five-Speed Manual Transmission (Without Low Gear)

This is your shift pattern. Here’s how to operate your transmission:

1 (First Gear) - Press the clutch pedal and shift into “1 .” Then, slowly let up on the clutch pedal as you press the accelerator pedal. You can shift into “1” when you’re going less than 20 mph (32 km/h). If you’ve come to a complete stop and it’s hard to shift into L‘ 1 ,” put the shift lever in Neutral and let up on the clutch. Press the clutch pedal back down. Then shift into LLl.” 2 (Second Gear) - Press the clutch pedal as you let up on the accelerator pedal and shift into “2.” Then, slowly let up on the clutch pedal as you press the accelerator pedal. 3,4 and 5 (Third, Fourth and Fifth Gears) - Shift into “3,” “4” and “5” the same way you do for “2.” Slowly let up on the clutch pedal as you press the accelerator pedal. To Stop - Let up on the accelerator pedal and press the brake pedal. Just before the vehicle stops, press the clutch pedal and the brake pedal, and shift to Neutral.

2-25

R (Reverse) - To back up, first press down the clutch pedal. Wait 3-5 seconds for the internal parts to stop spinning and then, shift into “R.” Let up on the clutch pedal slowly while pressing the accelerator pedal.

NOTICE: Shift to “R” (Reverse) only after your vehicle is stopped. Shifting to LLR” (Reverse) while your vehicle is moving could damage your transmission.

Also, use Reverse, along with the parking brake, when turning off your engine and parking your vehicle.

Shift Light

If you have a manual transmission, you may have a SHIFT light. This light will show you when to shift to the next higher gear for best fuel economy.

When this light comes on, you can shift to the next higher gear if weather, road and traffic conditions let you. For the best fuel economy, accelerate slowly and shift when the light comes on. While you accelerate, it is normal for the light to go on and off if you quickly change the position of the accelerator. Ignore the SHIFT light when you downshift. Four-Wheel-Drive Vehicles Only: If your vehicle has four-wheel drive and is equipped with a manual transmission, disregard the shift light when the transfer case is in 4-LOW.

2-26

Manual Transmissions- Shift Speeds If you have a five-speed manual transmission (with low gear), this chart shows when to shift to the next higher gear Recommended Shift Speeds - Five Speed Manual Transmission with Low Gear*

for best fuel economy.

Engine (VIN Code)

Acceleration Shift Speed MPH (KM/H)

4.3L V6 (Z) 5.7L V8 (K)

15 (24) 15 (24)

40 (64) 25 (40)

50 (80) 40 (64)

Cruise Shift Speed MPH (KM/H)

4.3L V6 (Z)

25-40 (40-64)

45-50 (72-80)

*L (low) is intended for use with heavy loads and is not recommended for normal driving If your speed drops below 20 mph (32 km/h), or if the engine is not running smoothly, you should downshift to the next lower gear. You may have to downshift two or more gears to keep the engine running smoothly or for good performance.

NOTICE: If you skip more than one gear when you downshift, race the engine when you downshift, you can damage the engine, clutch or transmission.

or if you

2-27

Locking Rear Axle If you have this feature, your rear axle can give you additional traction on snow, mud, ice, sand or gravel. It works like a standard axle most of the time, but when one of the rear wheels has no traction and the other does, the locking feature will allow the wheel with traction to move the vehicle.

To set the parking brake:

Hold the regular brake pedal down with your right foot. Push down the parking brake pedal with your left foot.

If the ignition is on, the brake system warning light will come on. To release the parking brake:

Hold the regular brake pedal down. Pull the lever, located just above the parking brake pedal, marked RELEASE to release the parking brake.

If the ignition is on when the parking brake is released, the brake system warning light will go off.

NOTICE: Driving with the parking brake on can cause your rear brakes to overheat. You may have to replace them, and you could also damage other parts of your vehicle.

If you are towing a trailer and are parking on any hill: See “Towing a Trailer” in the Index. That section shows what to do first to keep the trailer from moving.

Propshaft Brake Burnish Procedure If you have a 3500 HD model, it is recommended that the propshaft mounted 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. Make 10 (ten) stops, using the parking brake foot pedal, from 20 mph (32 k d h ) about 2 1/2 miles (4 km) apart. In between stops, drive the vehicle at 20 mph (32 km/h).

Torque Lock The parking brake should be set first whenever you leave the driver’s seat. If you are parked on a hill and the transmission is placed in “P” (Park) before the parking brake is set, the weight of the vehicle may put too much force on the parking pawl in the transmission. It may be difficult to pull the selector lever out of “ P ’ (Park). This is called “torque lock.” To prevent this, the parking brake should be set BEFORE moving the gear selector to “ P ’ (Park). When preparing to move a vehicle parked on a hill, the selector lever should be moved out of “P’ (Park) BEFORE releasing the parking brake. Even when on level surfaces, its a good idea to set the parking brake first before shifting the transmission from “P” (Park). If torque lock does occur, you may have to have another vehicle nudge your vehicle uphill a little to take some of the pressure off the transmission while you pull the selector lever out of “P” (Park).

2-29

Shifting Into “P” (Park) (Automatic Transmission Models Only)

Steering Column Shift Lever

1. Hold the brake

pedal down with your right foot and set the parking brake.

2. Move the shift lever into “P” (Park) position like this:

0 Pull the lever toward you. 0 Move the lever up as far as it will go.

3. If you have four-wheel drive, be sure the transfer case is in a drive gear

- not in “N” (Neutral)

4. Move the ignition key to LOCK.

2-30

5. Remove the key and take it with you. If you can walk away from your

vehicle with the ignition key in your hand, your vehicle is in “P” (Park).

Leaving Your Vehic/e With the Engine Running (Automatic Transmission Models Only)

If you have to leave your vehicle with the engine running, be sure your vehicle is in “P” (Park) and your parking brake is firmly set before you leave it. If you have four-wheel drive with a manual transfer case shift lever, be sure that the transfer case is in a drive gear - not in “N” (Neutral). After you’ve moved the shift lever into the “ P ’ (Park) position, hold the regular brake pedal down. Then, see if you can move the shift lever away from “P” (Park) without first pulling it toward you. If you can, it means that the shift lever wasn’t fully locked into “P” (Park).

Torque Lock (Automatic Transmission) If you are parking on a hill and you don’t shift your transmission into “P” (Park) properly, the weight of the vehicle may put too much force on the parking pawl in the transmission. You may find it difficult to pull the shift lever out of “ P ’ (Park). This is called “torque lock.” To prevent torque lock, set the parking brake and then shift into “ P ’ (Park) properly before you leave the driver’s seat. To find out how, see “Shifting Into ‘P’ (Park)” in the Index. When you are ready to drive, move the shift lever out of “P” (Park) BEFORE you release the parking brake. If “torque lock” does occur, you may need to have another vehicle push yours a little uphill to take some of the pressure from the transmission, so you can pull the shift lever out of “ P ’ (Park).

2-31

Parking Your Vehicle (Manual Transmission Models Only) Before you get out of your vehicle, put your manual transmission in “R” (Reverse), turn off the engine, and firmly apply the parking brake. If you have four-wheel drive, be sure your transfer case is in a drive gear. Your vehicle could roll if it isn’t. If you are parking on a hill, or if your pulling a trailer, see “Parking on Hills” or “Towing a Trailer” in the Index. Parking Over Things That Burn

2-32

Engine Exhaust

Running Your Engine While You’re Parked (Automatic Transmission) It’s better not to park with the engine running. But if you ever have to, here are some things to know.

2-33

If you have four-wheel drive and your transfer case is in “N” (Neutral), your vehicle will be free to roll, even if your shift lever is in “P” (Park). So, be sure the transfer case is in a drive gear - not in “N” (Neutral). Follow the proper steps to be sure your vehicle won’t move. See “Shifting Into ‘P’ (Park)’’ in the Index. If you’re pulling a trailer, see “Towing a Trailer” in the Index. Four- Wheel Drive If your vehicle has four-wheel drive, you can send your engine’s driving power to all four wheels for extra traction. To get the most satisfixtion out of four-wheel drive, you must be familiar with it’s operation. Read the part that follows before using four-wheel drive. You should use 2H for most normal driving conditions. Rear-wheel antilock brakes do not work when you shift into four-wheel drive. Your regular brakes will still work. When you shift back into two-wheel drive, your rear-wheel antilock brakes will take over again.

2-34

NOTICE: Driving in the 4H or 4L positions for a long time on dry or wet pavement could shorten the life of your vehicle’s drivetrain.

Transfer Case

The transfer case shift lever is on the floor to the right of the driver. Use this lever to shift into and out of

An indicator near the lever shows you the transfer case settings.

The front axle portion of the indicator diagram will light up when you shift into four-wheel drive.

is normal. If the Some delay between shifting and the indicator’s lighting indicator light does not light up, or if the front axle light does not go out after you shift out of four-wheel drive, have your dealer check your system.

2-35

When your headlights or parking lights are on, rotate the dial to the right of your headlight switch up to brighten, or down to dim, your transfer case indicator light. 2H (2-Wheel High): This setting is for driving in most street and highway situations. Your front axle is not engaged in two-wheel drive. 4H (4-Wheel High): This setting engages your front axle to help drive your vehicle. Use 4H when you need extra traction, such as on wet or icy roads, or in most off-road situations. N (Neutral): Shift to this setting only when your vehicle needs to be towed or when using a power take-off. 4L (4-Wheel Low): This setting also engages your front axle to give you extra power, but should be used only for off-road driving. You can shift from 2H to 4H or from 4H to 2H while the vehicle is moving. Your front axle will engage faster if you take your foot off of the accelerator