GMC 2007 Owner's manual

Seats and Restraint Systems

....................... 7

Front Seats

.............................................. 9

Rear Seats

............................................. 19

Safety Belts

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

Child Restraints

...................................... 44

Airbag System

........................................ 91

Restraint System Check

....................... 111

Features and Controls

.............................. 113

Keys

..................................................... 115

Doors and Locks

.................................. 120

Windows

............................................... 129

Theft-Deterrent Systems

....................... 131

Starting and Operating Your Vehicle

..... 134

Mirrors

.................................................. 176

OnStar

®

System

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

Universal Home Remote System

.......... 191

Storage Areas

...................................... 202

Sunroof

................................................ 205

Instrument Panel

....................................... 207

Instrument Panel Overview

................... 210

Climate Controls

................................... 230

Warning Lights, Gages, and Indicators

.... 244

Driver Information Center (DIC)

............ 265

Audio System(s)

................................... 289

Driving Your Vehicle

................................. 355

Your Driving, the Road, and

Your Vehicle

..................................... 356

Towing

................................................. 423

2007 GMC Sierra Classic Owner Manual M

1

Service and Appearance Care

.................. 465

Service

................................................. 468

Fuel

...................................................... 470

Checking Things Under the Hood

......... 478

Rear Axle

............................................. 527

Four-Wheel Drive

.................................. 528

Front Axle

............................................ 529

Noise Control System

........................... 531

Bulb Replacement

................................ 532

Windshield Wiper Blade

Replacement

..................................... 542

Tires

..................................................... 543

Appearance Care

.................................. 589

Vehicle Identiﬁcation

............................. 598

Electrical System

.................................. 599

Capacities and Speciﬁcations

................ 609

Maintenance Schedule

.............................. 613

Maintenance Schedule

.......................... 614

Customer Assistance Information

............. 637

Customer Assistance and

Information

........................................ 638

Reporting Safety Defects

...................... 656

Index

.......................................................... 659

2

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.

This manual describes features that may be

available in this model, but your vehicle may not

be equipped with all of them. For example,

more than one entertainment system may be

offered or your vehicle may have been ordered

without a front passenger or rear seats.

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

if it is 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

Litho in U.S.A.

Part No. 15856875 A First Printing

©

3

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.

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.”

4

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

5

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

6

Front Seats ..................................................... 9

Manual Seats ................................................ 9

Power Seats ............................................... 10

Power Lumbar ............................................. 11

Heated Seats .............................................. 11

Memory Seat and Mirrors ............................ 12

Reclining Seatbacks .................................... 15

Head Restraints .......................................... 18

Seatback Latches ........................................ 18

Rear Seats .................................................... 19

Rear Seat Operation (Extended Cab) .......... 19

Rear Seat Operation (Crew Cab) ................ 20

Safety Belts .................................................. 22

Safety Belts: They Are for Everyone ........... 22

Questions and Answers About

Safety Belts ............................................. 26

How to Wear Safety Belts Properly ............. 27

Driver Position ............................................. 27

Safety Belt Use During Pregnancy .............. 36

Right Front Passenger Position ................... 37

Center Front Passenger Position ................. 37

Rear Seat Passengers ................................ 38

Rear Safety Belt Comfort Guides ................ 41

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

Child Restraints ............................................ 44

Older Children ............................................. 44

Infants and Young Children ......................... 47

Child Restraint Systems .............................. 51

Where to Put the Restraint .......................... 55

Lower Anchors and Tethers for

Children (LATCH) .................................... 58

Securing a Child Restraint in a Rear

Seat Position ........................................... 71

Securing a Child Restraint in the Center

Front Seat Position .................................. 74

Securing a Child Restraint in the Right

Front Seat Position (Crew Cab)

(With Passenger Sensing System) ........... 74

Securing a Child Restraint in the

Right Front Seat Position

(Regular and Extended Cab)

(With Airbag Off Switch) .......................... 78

Securing a Child Restraint in the Right

Front Seat Position (Regular and

Extended Cab) (With Passenger

Sensing System) ...................................... 85

Section 1 Seats and Restraint Systems

7

Airbag System .............................................. 91

Where Are the Airbags? .............................. 93

When Should an Airbag Inﬂate? .................. 95

What Makes an Airbag Inﬂate? ................... 97

How Does an Airbag Restrain? ................... 98

What Will You See After an Airbag

Inﬂates? ................................................... 98

Airbag Off Switch ...................................... 100

Passenger Sensing System ....................... 103

Servicing Your Airbag-Equipped Vehicle .... 108

Adding Equipment to Your

Airbag-Equipped Vehicle ........................ 109

Restraint System Check ............................. 111

Checking the Restraint Systems ................ 111

Replacing Restraint System Parts

After a Crash ......................................... 112

Section 1 Seats and Restraint Systems

8

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 the seat forward or

rearward with the bar located under the front of the

seat cushion.

Lift the bar to unlock the seat. Slide the seat to

where you want it and release the bar. Try to move

the seat with your body to be sure the seat is

locked in place.

9

Power Seats

If the vehicle has power seats, the controls used

to operate them are located on the outboard

side of the seats. To adjust the seat, do any of the

following:

• Move the seat forward or rearward by sliding

the horizontal control forward or rearward.

• Raise or lower the front part of the seat

cushion by moving the front of the horizontal

control up or down.

• Raise or lower the rear part of the seat

cushion by moving the rear of the horizontal

control up or down.

• Raise or lower the entire seat by moving the

entire horizontal control up or down.

If your vehicle has power reclining seatbacks, the

control is located rear of the power seat control

on the outboard side of the seats. See “Power

Reclining Seatbacks” under Reclining Seatbacks

on page 15.

10

Power Lumbar

Your vehicle may have this feature.

The control is located

on the outboard side of

the seat cushion.

To increase or decrease support, hold the control

forward or rearward. Keep in mind that as your

seating position changes, as it may during

long trips, so should the position of your lumbar

support. Adjust the seat as needed.

Heated Seats

If your vehicle has 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 come on to

designate the level of heat selected: three for

high, two for medium, and one for low.

11

To heat only the seatback, press the vertical

button with the heated seatback symbol. An

indicator light on the seatback button will come on

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 seats will be canceled after the

ignition is turned off. If you still want to use

the heated seat feature after you restart your

vehicle, you will need to press the heated

seat button again.

Memory Seat and Mirrors

If your vehicle has this

feature, the controls for

the memory function

are located on the

driver’s door.

These buttons are used to program and recall

memory settings for the driver’s seat and both the

driver’s and passenger’s outside mirrors. The

settings for these features can be saved for up to

two drivers.

12

To store the memory settings, do the following:

1. If you have an automatic transmission, place

the vehicle in PARK (P).

If you have a manual transmission, set the

parking brake.

2. Adjust the driver’s seat, including the seatback

recliner and lumbar, and both outside mirrors

to your preference.

3. Press and hold the 1 or 2 button of the

memory control for three seconds. A

double chime will sound to let you know that

the position has been stored.

To repeat the procedure for a second driver,

follow the preceding steps, but press the other

numbered memory control button.

To recall a memory position, do one of the

following:

• If you have an automatic transmission, press

and release the desired button 1 or 2 while

the vehicle is in PARK (P). A single chime will

sound and the memory position will be

recalled.

If the vehicle is not in PARK (P), the memory

position will not be recalled.

• If you have a manual transmission, press and

release the desired button 1 or 2 while the

parking brake is set. A single chime will sound

and the memory position will be recalled.

If the parking brake is not set, the memory

position will not be recalled.

To stop recall movement of the memory seat

feature at any time, press one of the memory

buttons or power seat controls.

13

Easy Exit Seat

The controls for this memory function are located

on the driver’s door.

B(Easy Exit Seat): This button is used to

program and recall the desired driver’s seat

position when exiting or entering the vehicle. The

seat position can be saved for up to two drivers.

To store the seat exit position, do the following:

1. If you have an automatic transmission,

place the vehicle in PARK (P).

If you have a manual transmission, set the

parking brake.

2. Press and release the 1 or 2 button. The seat

will move to the stored memory position.

3. Adjust the seat to the desired exit position.

4. Press and hold the exit button of the memory

control for three seconds. A double chime will

sound to let you know that the position has

been stored for the selected button 1 or 2.

To repeat the procedure for a second driver,

follow the preceding steps, but press the other

numbered memory control button.

To use the seat exit position, do one of the

following:

• If you have an automatic transmission, press

and release the exit button on the memory

control while the vehicle is in PARK (P).

• If you have a manual transmission, press and

release the exit button on the memory control

while the parking brake is set.

• If this feature is activated in the Driver

Information Center (DIC), removing the key

from the ignition will move the seat to the exit

position.

See “Easy Exit Seat” under DIC Vehicle

Customization on page 282 for more information

on activating this feature in the DIC.

14

Reclining Seatbacks

Manual Reclining Seatbacks

{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.

{CAUTION:

If the seatback is not locked, it could

move forward in a sudden stop or crash.

That could cause injury to the person

sitting there. Always push and pull on the

seatback to be sure it is locked.

If your seats have manual reclining seatbacks, the

lever used to operate them is located on the

outboard side of the seat(s).

To recline the seatback, do the following:

1. Lift the recline lever.

2. Move the seatback to the desired position,

then release the lever to lock the seatback

in place.

3. Push and pull on the seatback to make sure it

is locked.

15

To return the seatback to an upright position, do

the following:

1. Lift the lever fully without applying pressure to

the seatback and the seatback will return to

the upright position.

2. Push and pull on the seatback to make sure it

is locked.

Power Reclining Seatbacks

If your seats have power reclining seatbacks, use

the vertical power seat control located on the

outboard side of the seat(s).

• To recline the seatback, press the control

toward the rear of the vehicle.

• To raise the seatback, press the control

toward the front of the vehicle.

16

{CAUTION:

Sitting in a reclined position when your

vehicle is in motion can be dangerous.

Even if you buckle up, your safety belts

cannot do their job when you are reclined

like this.

The shoulder belt cannot do its job

because it will not be against your body.

Instead, it will be in front of you. In a

crash, you could go into it, receiving neck

or other injuries.

The lap belt cannot do its job either. In a

crash, the belt could go up over your

abdomen. The belt forces would be there,

not at your pelvic bones. This could cause

serious internal injuries.

For proper protection when the vehicle is

in motion, have the seatback upright.

Then sit well back in the seat and wear

your safety belt properly.

Do not have a seatback reclined if your vehicle is

moving.

17

Head Restraints

Adjust the head restraint so that the top of the

restraint is at the same height as the occupant’s

head. This position reduces the chance of a

neck injury in a crash.

Pull the head restraint up to raise it. Push the

head restraint down to lower it.

The rear seats may have head restraints that can

be adjusted up and down.

Seatback Latches

The front seatbacks fold forward to allow access

to the rear of the cab.

To fold the seatback forward, lift the lever located

on the outboard side of the seat cushion.

{CAUTION:

If the seatback is not locked, it could

move forward in a sudden stop or crash.

That could cause injury to the person

sitting there. Always push and pull on the

seatback to be sure it is locked.

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.

18

Rear Seats

Rear Seat Operation (Extended Cab)

Folding the Rear Seat

The rear seat in the extended cab can be folded

up to provide more cargo space.

To fold the seat up, do the following:

Notice: Folding a rear seat with the safety

belts still fastened may cause damage to the

seat or the safety belts. Always unbuckle

the safety belts and return them to their normal

stowed position before folding a rear seat.

1. Push down on the

front of the seat

cushion while pulling

down on the

release strap,

located under the

seat cushion.

2. Pull the seat cushion up until it latches with

the seatback.

3. After latching the seat cushion up, pull

forward on it to make sure it is locked.

The seat can also be folded down for more

seating space.

To fold the seat down, do the following:

1. Push the seat cushion while pulling the

release strap, located under the seat cushion.

Pull the seat cushion down until it latches.

2. After latching the seat cushion, pull up on it to

make sure it is locked.

19

Rear Seat Operation (Crew Cab)

The second row seat is a 60/40 split seat. Either

side of the rear seat may be ﬂipped and folded for

added cargo space.

Make sure that nothing is under or in front of the

seat and that the head restraints are completely

lowered.

To ﬂip and fold the 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

ﬂip it forward.

Notice: Folding a rear seat with the safety

belts still fastened may cause damage to the

seat or the safety belts. Always unbuckle

the safety belts and return them to their normal

stowed position before folding a rear seat.

2. After folding the seat cushion fully forward, pull

the seatback forward 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.

20

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