GMC Sierra 2500HD 2005 Owner's manual

Seats and Restraint Systems

........................... 1-1

Front Seats

............................................... 1-3

Rear Seats

............................................... 1-9

Safety Belts

............................................. 1-11

Child Restraints

....................................... 1-33

Airbag System

......................................... 1-66

Restraint System Check

............................ 1-82

Features and Controls

..................................... 2-1

Keys

........................................................ 2-3

Doors and Locks

....................................... 2-8

Windows

................................................. 2-16

Theft-Deterrent Systems

............................ 2-19

Starting and Operating Your Vehicle

........... 2-21

Mirrors

.................................................... 2-55

OnStar

®

System

...................................... 2-64

HomeLink

®

Transmitter

............................. 2-66

Storage Areas

......................................... 2-70

Sunroof

.................................................. 2-73

Vehicle Personalization

............................. 2-74

Instrument Panel

............................................. 3-1

Instrument Panel Overview

.......................... 3-4

Climate Controls

...................................... 3-21

Warning Lights, Gages, and Indicators

........ 3-31

Driver Information Center (DIC)

.................. 3-50

Audio System(s)

....................................... 3-69

Driving Your Vehicle

....................................... 4-1

Your Driving, the Road, and Your Vehicle

........ 4-2

Towing

................................................... 4-62

Service and Appearance Care

.......................... 5-1

Service

..................................................... 5-4

Fuel

......................................................... 5-6

Checking Things Under the Hood

............... 5-12

Rear Axle

............................................... 5-58

Four-Wheel Drive

..................................... 5-58

Front Axle

............................................... 5-60

Noise Control System

............................... 5-61

Bulb Replacement

.................................... 5-62

Windshield Wiper Blade Replacement

......... 5-72

Tires

...................................................... 5-72

Appearance Care

................................... 5-112

Vehicle Identiﬁcation

............................... 5-120

Electrical System

.................................... 5-121

Capacities and Speciﬁcations

................... 5-130

Maintenance Schedule

..................................... 6-1

Maintenance Schedule

................................ 6-2

Customer Assistance and Information

.............. 7-1

Customer Assistance and Information

........... 7-2

Reporting Safety Defects

........................... 7-10

Index

................................................................ 1

2005 GMC Sierra Owner Manual M

GENERAL MOTORS, GM, the GM Emblem, GMC, the

GMC Truck Emblem, and the name SIERRA are

registered trademarks of General Motors Corporation.

This manual includes the latest information at the time it

was printed. We reserve the right to make changes

after that time without further notice. For vehicles ﬁrst

sold in Canada, substitute the name “General Motors of

Canada Limited” for GMC whenever it appears in

this manual.

Keep this manual in the vehicle, so it will be there if it is

ever needed. If the vehicle is sold, leave this manual

in it so the new owner can use it.

Canadian Owners

A French language copy of this manual can be obtained

from your dealer or from:

Helm, Incorporated

P.O. Box 07130

Detroit, MI 48207

How to Use This Manual

Many people read the owner manual from beginning to

end when they ﬁrst receive their new vehicle. If this

is done, it can help you learn about the features

and controls for the vehicle. Pictures and words work

together in the owner manual 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.

Litho in U.S.A.

Part No. 05SIERRA A First Edition

©

ii

Safety Warnings and Symbols

There are a number of safety cautions in this book. We

use a box and the word CAUTION to tell about things

that could hurt you if you were to ignore the warning.

{CAUTION:

These mean there is something that could hurt

you or other people.

In the 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 do not,

you or others could be hurt.

You will also ﬁnd a circle

with a slash through it in

this book. This safety

symbol means “Do Not,”

“Do Not do this” or “Do Not

let this happen.”

iii

Vehicle Damage Warnings

Also, in this manual you will ﬁnd these notices:

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. But

the notice will tell 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. They 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

iv

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

v

✍ NOTES

vi

Front Seats ......................................................1-3

Manual Seats ................................................1-3

Power Seats ..................................................1-4

Power Lumbar ...............................................1-5

Heated Seats .................................................1-5

Reclining Seatbacks ........................................1-6

Head Restraints .............................................1-8

Seatback Latches ...........................................1-8

Rear Seats .......................................................1-9

Rear Seat Operation (Extended Cab) ................1-9

Rear Seat Operation (Crew Cab) ....................1-10

Safety Belts ...................................................1-11

Safety Belts: They Are for Everyone ................1-11

Questions and Answers About Safety Belts ......1-15

How to Wear Safety Belts Properly .................1-16

Driver Position ..............................................1-16

Safety Belt Use During Pregnancy ..................1-25

Right Front Passenger Position .......................1-25

Center Passenger Position .............................1-25

Rear Seat Passengers ..................................1-27

Rear Safety Belt Comfort Guides for

Children and Small Adults ..........................1-30

Safety Belt Extender .....................................1-32

Child Restraints .............................................1-33

Older Children ..............................................1-33

Infants and Young Children ............................1-35

Child Restraint Systems .................................1-39

Where to Put the Restraint .............................1-42

Top Strap ....................................................1-43

Top Strap Anchor Location .............................1-45

Lower Anchorages and Top Tethers

for Children (LATCH System) ......................1-47

Securing a Child Restraint Designed

for the LATCH System ...............................1-49

Securing a Child Restraint in a Rear

Outside Seat Position ................................1-50

Securing a Child Restraint in a Center

Rear Seat Position ....................................1-52

Securing a Child Restraint in the Center

Front Seat Position ....................................1-53

Securing a Child Restraint in the Right

Front Seat Position (Crew Cab) ...................1-54

Securing a Child Restraint in the Right Front

Seat Position (Regular and Extended Cab)

(With Airbag Off Switch) .............................1-56

Securing a Child Restraint in the Right Front

Seat Position (Regular and Extended Cab)

(With Passenger Sensing System) ...............1-62

Section 1 Seats and Restraint Systems

1-1

Airbag System ...............................................1-66

Where Are the Airbags? ................................1-68

When Should an Airbag Inﬂate? .....................1-69

What Makes an Airbag Inﬂate? .......................1-71

How Does an Airbag Restrain? .......................1-71

What Will You See After an Airbag Inﬂates? .....1-72

Airbag Off Switch ..........................................1-73

Passenger Sensing System ............................1-76

Servicing Your Airbag-Equipped Vehicle ...........1-80

Adding Equipment to Your Airbag-Equipped

Vehicle ....................................................1-81

Restraint System Check ..................................1-82

Checking Your Restraint Systems ...................1-82

Replacing Restraint System Parts

After a Crash ............................................1-82

Section 1 Seats and Restraint Systems

1-2

Front Seats

Manual Seats

{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.

If your vehicle has a manual bucket or a split bench

seat, you can adjust it with this lever located at the front

of the seat.

Lift the lever to unlock the seat. Using your body, slide

the seat to where you want it and release the lever.

Try to move the seat with your body to make sure the

seat is locked into place.

1-3

Power Seats

If your vehicle has a power seat, you can adjust

it with these controls located on the outboard sides

of the seats.

• Raise or lower the front of the seat cushion by

raising or lowering the forward edge of the

horizontal control.

• Move the seat forward or rearward by moving the

whole horizontal control forward or rearward.

• Raise or lower the rear of the seat cushion by

raising or lowering the rear edge of the horizontal

control.

• Moving the whole horizontal control up or down

raises or lowers the entire seat cushion.

If your vehicle has power reclining seats, you can use

the vertical control to adjust the angle of the seatback.

Move the reclining front seatback rearward or forward

by moving the control toward the rear or the front of the

vehicle. See Reclining Seatbacks on page 1-6.

1-4

Power Lumbar

Your vehicle’s seats may be equipped with power

lumbar.

You can increase or

decrease lumbar support

in an area of the lower

seatback with this control,

located on the outboard

sides of the front seat(s).

To increase support, press and hold the front of the

control. To decrease support, press and hold the rear of

the control. Let go of the control when the lower

seatback reaches the desired level of support.

You can also reshape the side wing area of the lower

seatback for more lateral support.

To increase support, press and hold the top of the

control. To decrease support, press and hold the bottom

of the control. Let go of the control when the lower

seatback reaches the desired level of support.

Your vehicle may have a memory function which allows

seat settings to be saved and recalled. See Memory

Seat on page 2-74 for more information.

Heated Seats

If your vehicle is equipped

with this feature, the

buttons are located on the

front doors. The engine

must be running for

the heated seats to work.

To heat the entire seat, press the horizontal button with

the heated seat and seatback symbol. Press the button to

cycle through the temperature settings of high, medium

and low and to turn the heated seat off. Indicator lights

will be lit to designate the level of heat selected: three for

high, two for medium, and one for low.

The low setting warms the seatback and cushion until

the seat temperature is near body temperature. The

medium and high settings heat the seatback and seat

cushion to a slightly higher temperature. You will be able

to feel heat in about two minutes.

1-5

To heat only the seatback, press the vertical button with

the heated seatback symbol. An indicator light on the

seatback button will be lit to designate that only the

seatback is being heated. Additional presses of

the seatback button will cycle through the heat levels for

the seatback only. Press the horizontal button again

to heat the whole seat.

The heated front seats will shut off automatically when

the ignition is turned off.

Reclining Seatbacks

To adjust the front seatback, lift the manual lever

located on the outboard side of the seat. Release the

lever to lock the seatback where you want it. Lift

the lever again without pushing on the seatback and the

seatback will go to an upright position.

If your vehicle has power seats with a power recliner,

see Power Seats on page 1-4 for further information on

how to operate the reclining seatback feature.

1-6

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

moving.

{CAUTION:

Sitting in a reclined position when your vehicle

is in motion can be dangerous. Even if you

buckle up, your safety belts can not do their

job when you are reclined like this.

The shoulder belt can not do its job. In a

crash, you could go into it, receiving neck or

other injuries.

The lap belt can not 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.

1-7

Head Restraints

Adjust your head restraint so that the top of the restraint

is closest to the top of your head. This position

reduces the chance of a neck injury in a crash.

To raise the head restraint pull up on the head restraint.

Your vehicle may have rear seat head restraints that

can be adjusted up and down.

Seatback Latches

{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

press rearward on the seatback to be sure it is

locked.

The seatbacks fold forward to let you access the rear of

the cab.

To fold a front seatback forward, lift the lever at the

base of the seat to release the seatback.

The lever is located on the outboard side of the seat

cushion.

To return the seatback to the upright position, push the

seatback rearward until it latches. After returning the

seatback to its upright position, push and pull on

the seatback to make sure it is locked.

1-8

Rear Seats

Rear Seat Operation (Extended Cab)

Folding the Rear Seat

The extended cab’s rear seat can be folded up to

provide more cargo space. To fold the seat do the

following:

1. Push down on the seat

while pulling forward on

the release strap

located under the rear

seat cushion.

2. Pull the seat cushion up until it latches with the

seatback.

3. After latching the seat cushion up, gently pull

forward on it to make sure it is locked.

The extended cab’s rear seat can also be folded open

for more seating space. To use the seat do the following:

1. Push rearward on the seat cushion while pulling

forward on the release strap under the seat

cushion. Pull the seat cushion down until it latches.

2. After latching the seat cushion down, gently pull up

on it to make sure it is locked.

1-9

Rear Seat Operation (Crew Cab)

The second row rear seat has a 60/40 split seat. Either

side of the rear seat may be folded down to give

you more cargo space.

Make sure that nothing is under or in front of the seat

and that the head restraints are completely lowered.

To fold the rear seat, do the following:

1. Pull up on the strap

loop at the rear of the

seat cushion. Then,

pull the seat cushion up

and fold it forward.

2. After folding the seat cushion fully forward, pull the

seatback forward and fold the seatback down until it

is ﬂat. If the seatback cannot fold ﬂat because it

interferes with the cushion, try moving the front seat

forward and/or bringing the front seat more

upright. The lever at the base of the seat must be

turned rearward to release the seatback.

To return the seat to the passenger position do the

following:

1. Lift the seatback up and push it rearward all

the way.

2. Lower the seat cushion until it latches into position.

3. Pull forward on the seatback and up on the seat

cushion to make sure the seat is securely in

place.

Check to see that the buckles on the driver’s side

seatback are accessible to the outboard and center

occupant and are not under the seat cushions.

1-10

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 can not

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 3-33.

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.

1-11

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 30 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.

Take the simplest vehicle. Suppose it is just a seat on

wheels.

1-12

Put someone on it. Get it up to speed. Then stop the vehicle. The rider

does not stop.

1-13

The person keeps going until stopped by something. In

a real vehicle, it could be the windshield...

or the instrument panel...

1-14

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