GMC SIERRA 2004 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
Air Bag Systems
......................................1-70
Restraint System Check
............................1-87
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
....................................................2-54
OnStar
žSystem
......................................2-64
Storage Areas
.........................................2-66
Vehicle Personalization
.............................2-69
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-21
Warning Lights, Gages and Indicators
.........3-33
Driver Information Center (DIC)
..................3-55
Audio System(s)
.......................................3-73Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-53
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under the Hood
...............5-10
Rear Axle
...............................................5-59
Four-Wheel Drive
.....................................5-60
Noise Control System
...............................5-62
Bulb Replacement
....................................5-64
Windshield Wiper Blade Replacement
.........5-74
Tires
......................................................5-76
Appearance Care
...................................5-116
Vehicle Identi®cation
...............................5-125
Electrical System
....................................5-125
Capacities and Speci®cations
...................5-134
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance and Information.............. 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-11
Index................................................................ 1
2004 GMC Sierra Owner ManualM

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 ®rst
sold in Canada, substitute the name ªGeneral Motors of
Canada Limitedº for GMC whenever it appears in this
manual.
Please keep this manual in your vehicle, so it will be
there if you ever need it when you're on the road. If you
sell the vehicle, please leave this manual in it so the
new owner can use it.
Litho in U.S.A.
Part No. X2415 A First Edition
Copyright General Motors Corporation 06/23/03
All Rights Reserved
Canadian Owners
You can obtain a French copy of this manual from your
dealer or from:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
How to Use This Manual
Many people read their owner's manual from beginning
to end when they ®rst receive their new vehicle. If
you do this, it will help you learn about the features and
controls for your vehicle. In this manual, you will ®nd
that pictures and words work together to explain things.
Index
A good place to look for what you need is the Index in
back of the manual. It is an alphabetical list of what
is in the manual, and the page number where you will
®nd it.
ii

Safety Warnings and Symbols
You will ®nd a number of safety cautions in this book.
We use a box and the word CAUTION to tell you 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 don't, you
or others could be hurt.You will also ®nd a circle
with a slash through it in
this book. This safety
symbol means ªDon't,º
ªDon't do thisº or ªDon't let
this happen.º
iii

Vehicle Damage Warnings
Also, in this book you will ®nd these notices:
Notice:These mean there is something that could
damage your vehicle.
A notice will 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
the same words, CAUTION or NOTICE.
Vehicle Symbols
Your vehicle has components and labels that use
symbols instead of text. Symbols, used on your vehicle,
are shown along with the text describing the operation
or information relating to a speci®c component, control,
message, gage or indicator.
If you need help ®guring out a speci®c 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 you may ®nd on your vehicle:
v

Model Reference
This manual covers these models:
Regular Cab Pickup
Extended Cab PickupCrew CabžChassis Cab
vi

Front Seats......................................................1-3
Manual Seats................................................1-3
Power Seats..................................................1-4
Power Lumbar...............................................1-5
Heated Seats.................................................1-6
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)......................1-9
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..................1-24
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.....................................1-32Child 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)...........................1-48
Securing a Child Restraint Designed for the
LATCH System (Rear)...............................1-50
Securing a Child Restraint Designed for the
LATCH System (Front)...............................1-51
Securing a Child Restraint in a Rear Outside
Seat Position............................................1-55
Securing a Child Restraint in a Center Rear
Seat Position............................................1-58
Securing a Child Restraint in the Center Front
Seat Position............................................1-60
Securing a Child Restraint in the Right Front
Seat Position
(Crew Cab)..............................................1-61
Securing a Child Restraint in the Right Front
Seat Position (Regular and Extended Cab) . . .1-64
Section 1 Seats and Restraint Systems
1-1

Air Bag Systems............................................1-70
Where Are the Air Bags?...............................1-72
When Should an Air Bag In¯ate?....................1-73
What Makes an Air Bag In¯ate?.....................1-74
How Does an Air Bag Restrain?.....................1-75
What Will You See After an Air Bag In¯ates? . . .1-75
Air Bag Off Switch........................................1-76
Passenger Sensing System............................1-81Servicing Your Air Bag-Equipped Vehicle.........1-86
Adding Equipment to Your Air Bag-Equipped
Vehicle....................................................1-86
Restraint System Check..................................1-87
Checking Your Restraint Systems...................1-87
Replacing Restraint System Parts After a
Crash......................................................1-88
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 don't 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 SeatsIf 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