2008 GMC SIERRA radio

Current and Past Model Order Forms
Technical Service Bulletins and Manuals are available
for current and past model GM vehicles. To request
an order form, specify year and model name of
the vehicle.
ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM - 6:00 PM
Eastern Time
For Credit Card Orders Only
(VISA-MasterCard-Discover), visit Helm, Inc.
on the World Wide Web at: www.helminc.com
Or you can write to:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
Prices are subject to change without notice and without
incurring obligation. Allow ample time for delivery.
Note to Canadian Customers: All listed prices are
quoted in U.S. funds. Canadian residents are to make
checks payable in U.S. funds.
Vehicle Data Recording and
Privacy
Your GM vehicle has a number of sophisticated
computers that record information about the vehicle’s
performance and how it is driven. For example,
your vehicle uses computer modules to monitor and
control engine and transmission performance, to monitor
the conditions for airbag deployment and deploy
airbags in a crash and, if so equipped, to provide
antilock braking to help the driver control the vehicle.
These modules may store data to help your
dealer/retailer technician service your vehicle. Some
modules may also store data about how you operate the
vehicle, such as rate of fuel consumption or average
speed. These modules may also retain the owner’s
personal preferences, such as radio pre-sets, seat
positions, and temperature settings.
7-16

OnStar®
If your vehicle has OnStar and you subscribe to the
OnStar services, please refer to the OnStar Terms and
Conditions for information on data collection and
use. See alsoOnStar
®System on page 2-65in this
manual for more information.
Navigation System
If your vehicle has a navigation system, use of the
system may result in the storage of destinations,
addresses, telephone numbers, and other trip
information. Refer to the navigation system operating
manual for information on stored data and for deletion
instructions.
Radio Frequency Identication
(RFID)
RFID technology is used in some vehicles for functions
such as tire pressure monitoring and ignition system
security, as well as in connection with conveniences
such as key fobs for remote door locking/unlocking and
starting, and in-vehicle transmitters for garage door
openers. RFID technology in GM vehicles does not use
or record personal information or link with any other
GM system containing personal information.
7-18

A
Accessories and Modications............................ 5-4
Adding a Snow Plow or Similar Equipment.........4-43
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-85
Additives, Fuel................................................. 5-7
Add-On Electrical Equipment...........................5-122
Adjustable Throttle and Brake Pedal..................2-26
Air Cleaner/Filter, Engine.................................5-19
Air Conditioning..............................3-25, 3-27, 3-28
Airbag
Off Light.....................................................3-39
Passenger Status Indicator...........................3-41
Readiness Light..........................................3-38
Airbag System................................................1-68
What Will You See After an Airbag Inates?....1-75
When Should an Airbag Inate?....................1-73
Where Are the Airbags?...............................1-71
Airbag Systems
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-85
Airbag Off Switch........................................1-76
How Does an Airbag Restrain?......................1-74
Passenger Sensing System...........................1-80
Servicing Your Airbag-Equipped Vehicle..........1-84
What Makes an Airbag Inate?......................1-74
Antenna, Fixed Mast......................................3-126Antenna, XM™ Satellite Radio Antenna
System.....................................................3-126
Antilock Brake System (ABS)............................. 4-4
Antilock Brake, System Warning Light................3-45
Appearance Care
Aluminum or Chrome-Plated Wheels.............5-118
Care of Safety Belts...................................5-115
Chemical Paint Spotting..............................5-120
Cleaning Exterior Lamps/Lenses..................5-116
Fabric/Carpet............................................5-114
Finish Care...............................................5-116
Finish Damage..........................................5-119
Instrument Panel, Vinyl, and Other Plastic
Surfaces
...............................................5-115
Interior Cleaning........................................5-112
Leather....................................................5-114
Sheet Metal Damage..................................5-119
Tires........................................................5-119
Underbody Maintenance.............................5-119
Vehicle Care/Appearance Materials...............5-120
Washing Your Vehicle.................................5-116
Weatherstrips............................................5-115
Windshield and Wiper Blades......................5-117
Appointments, Scheduling Service....................... 7-9
Ashtray.........................................................3-24
Audio System.................................................3-80
Audio Steering Wheel Controls....................3-124
Fixed Mast Antenna...................................3-126
1

Audio System (cont.)
Navigation/Radio System, see Navigation
Manual.................................................3-112
Radio Reception........................................3-125
Rear Seat Audio (RSA)...............................3-122
Setting the Clock.........................................3-81
Theft-Deterrent Feature...............................3-123
XM™ Satellite Radio Antenna System...........3-126
Audio System(s).............................................3-84
Automatic Headlamp System............................3-19
Automatic Transmission
Fluid..................................................5-22, 5-25
Operation...................................................2-28
Auxiliary Roof Mounted Lamp Switch.................3-20
B
Battery..........................................................5-45
Electric Power Management..........................3-22
Run-Down Protection...................................3-23
Brake
Emergencies................................................ 4-5
Brakes..........................................................5-42
System Warning Light..................................3-44
Braking........................................................... 4-3
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-22
Bulb Replacement...........................................5-59Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp............................................5-61
Halogen Bulbs............................................5-59
Headlamp Aiming........................................5-56
Headlamps.................................................5-60
License Plate Lamps....................................5-64
Pickup Box Identication and Fender
Marker Lamps.........................................5-62
Replacement Bulbs......................................5-65
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps........................................5-62
Buying New Tires...........................................5-84
C
Calibration.............................................2-55, 2-57
California Fuel.................................................. 5-7
California Perchlorate Materials Requirements....... 5-5
California Proposition 65 Warning....................... 5-4
Canadian Owners................................................ ii
Capacities and Specications..........................5-130
Carbon Monoxide...................2-14, 2-53, 4-31, 4-55
Care of
Safety Belts..............................................5-115
Cargo Lamp...................................................3-22
Cargo Management System.............................2-78
CD, MP3 ............................................3-102, 3-106
Center Console Storage Area...........................2-76
2

Mirrors
Automatic Dimming Rearview with Compass
and Temperature Display...........................2-57
Automatic Dimming Rearview with OnStar
®,
Compass and Temperature Display.............2-55
Manual Rearview Mirror................................2-55
Outside Manual Mirrors................................2-58
Outside Power Foldaway Mirrors....................2-61
Outside Power Mirrors..................................2-59
Outside Trailer-Tow Mirrors...........................2-59
MP3 ..................................................3-102, 3-106
MyGMLink.com................................................ 7-4
N
Navigation System, Privacy..............................7-18
Navigation/Radio System, see Navigation
Manual.....................................................3-112
New Vehicle Break-In......................................2-22
Noise Control System, Tampering......................5-56
O
Odometer......................................................3-36
Odometer, Trip...............................................3-36
Off-Road Driving.............................................4-12Off-Road Recovery..........................................4-10
Oil
Engine.......................................................5-15
Pressure Gage............................................3-50
Pressure Light.............................................3-51
Oil, Engine Oil Life System..............................5-18
Older Children, Restraints................................1-35
Online Owner Center........................................ 7-4
OnStar, Privacy..............................................7-18
OnStar
®System, see OnStar®Manual...............2-65
Operation, Universal Home Remote System........2-69
Other Warning Devices...................................... 3-8
Outlet Adjustment............................................3-33
Outlets
Accessory Power.........................................3-23
Outside
Manual Mirrors............................................2-58
Power Foldaway Mirrors...............................2-61
Power Mirrors.............................................2-59
Trailer-Tow Mirrors.......................................2-59
Overheated Engine Protection
Operating Mode..........................................5-33
Owner Checks and Services.............................6-11
Owners, Canadian............................................... ii
9

P
Paint, Damage..............................................5-119
Park Aid........................................................2-63
Park Brake....................................................2-49
Park (P)
Shifting Into................................................2-50
Shifting Out of............................................2-52
Parking
Assist........................................................2-63
Over Things That Burn.................................2-53
Passenger Airbag Status Indicator.....................3-41
Passenger Sensing System..............................1-80
Passing.........................................................4-11
PASS-Key
®III+..............................................2-20
PASS-Key®III+ Operation................................2-20
Perchlorate Materials Requirements, California...... 5-5
Pickup Conversion to Chassis Cab....................4-50
Power
Door Locks.................................................2-10
Electrical System.......................................5-123
Lumbar Controls........................................... 1-5
Retained Accessory (RAP)............................2-23
Seat............................................................ 1-4
Sliding Rear Window....................................2-17
Steering Fluid.............................................5-39
Windows....................................................2-16
Privacy..........................................................7-16
Event Data Recorders..................................7-17
Navigation System.......................................7-18Privacy (cont.)
OnStar.......................................................7-18
Radio Frequency Identication.......................7-18
Programmable Automatic Door Locks.................2-11
Puddle Lamps................................................3-20
R
Radio Frequency Identication (RFID), Privacy....7-18
Radios..........................................................3-80
Radio(s)........................................................3-84
Radios
Navigation/Radio System, see Navigation
Manual.................................................3-112
Rear Seat Audio........................................3-122
Reception.................................................3-125
Setting the Clock.........................................3-81
Theft-Deterrent..........................................3-123
Rainsense™ II Wipers.....................................3-12
Reading Lamps..............................................3-22
Rear Axle......................................................5-51
Locking........................................................ 4-5
Rear Door Security Locks................................2-11
Rear Doors....................................................2-13
Rear Seat Armrest..........................................2-77
Rear Seat Audio (RSA)..................................3-122
Rear Seat Entertainment System.....................3-113
Rear Seat Operation...............................1-12, 1-13
10

Secondary Latch System................................5-105
Securing a Child Restraint
Center Front Seat Position............................1-57
Rear Seat Position......................................1-55
Right Front Seat Position..............1-58, 1-62, 1-66
Security Light.................................................3-52
Service........................................................... 5-4
Accessories and Modications......................... 5-4
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-6
California Pershlorate Materials Requirements.... 5-5
California Proposition 65 Warning.................... 5-4
Doing Your Own Work................................... 5-5
Engine Soon Light.......................................3-48
Publications Ordering Information...................7-15
Service, Scheduling Appointments....................... 7-9
Servicing Your Airbag-Equipped Vehicle..............1-84
Sheet Metal Damage.....................................5-119
Shifting Into Park (P).......................................2-50
Shifting Out of Park (P)...................................2-52
Signals, Turn and Lane-Change........................3-10
Sliding Rear Window, Power.............................2-17
Snow Plow....................................................4-43
Spare Tire....................................................5-112
Installing....................................................5-98
Removing...................................................5-93
Storing.....................................................5-108
Specications, Capacities...............................5-130
Speedometer..................................................3-36
StabiliTrak
®System.......................................... 4-6StabiliTrak
®Indicator Light................................3-46
Start Vehicle, Remote....................................... 2-7
Starting the Engine.........................................2-24
Steering.......................................................... 4-8
Steering Wheel Controls, Audio.......................3-124
Steering Wheel, Tilt Wheel................................. 3-9
Storage Areas
Cargo Management System..........................2-78
Center Console Storage Area........................2-76
Cupholder(s)...............................................2-75
Glove Box..................................................2-74
Instrument Panel Storage Area......................2-75
Luggage Carrier..........................................2-76
Rear Seat Armrest.......................................2-77
Stuck in Sand, Mud, Ice, or Snow.....................4-34
Sun Visors.....................................................2-18
Sunroof.........................................................2-79
T
Tachometer....................................................3-36
Tailgate.........................................................2-14
Taillamps
Turn Signal, Stoplamps and Back-up Lamps....5-62
Theft-Deterrent, Radio....................................3-123
Theft-Deterrent Systems...................................2-18
Content Theft-Deterrent................................2-18
PASS-Key
®III+...........................................2-20
PASS-Key®III+ Operation.............................2-20
12

V
Vehicle
Control........................................................ 4-3
Damage Warnings........................................... iv
Loading......................................................4-36
Symbols......................................................... iv
Vehicle Customization, DIC..............................3-72
Vehicle Data Recording and Privacy..................7-16
Vehicle Identication
Number (VIN)............................................5-121
Service Parts Identication Label..................5-122
Vehicle, Remote Start....................................... 2-7
Ventilation Adjustment......................................3-33
Visors...........................................................2-18
Voltmeter Gage..............................................3-43
W
Warning Lights, Gages and Indicators................3-34
Warnings
DIC Warnings and Messages........................3-63
Hazard Warning Flashers............................... 3-8
Other Warning Devices.................................. 3-8
Safety and Symbols......................................... iii
Vehicle Damage.............................................. ivWheels
Alignment and Tire Balance..........................5-88
Different Size..............................................5-86
Replacement...............................................5-88
Where to Put the Restraint...............................1-44
Windows.......................................................2-15
Manual......................................................2-16
Power........................................................2-16
Sliding Rear................................................2-17
Windshield
Rainsense™ II Wipers..................................3-12
Washer......................................................3-13
Washer Fluid..............................................5-40
Wiper Blade Replacement.............................5-65
Wiper Blades, Cleaning..............................5-117
Wiper Fuses.............................................5-123
Wipers.......................................................3-12
Winter Driving................................................4-31X
XM Radio Messages.....................................3-111
XM™ Satellite Radio Antenna System..............3-126
Y
Your Vehicle and the Environment....................... 6-2
14