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. GM reserves the right to make changes after
that time without further notice. For vehicles rst sold in
Canada, substitute the name “General Motors of Canada
Limited” for GMC wherever it appears in this manual.
This manual describes features that may or may not be
on your speci c vehicle.
Read this manual from beginning to end to learn about
the vehicle’s features and controls. Pictures, symbols,
and words work together to explain vehicle operation.If the vehicle has the DURAMAX
®Diesel engine, refer
to the DURAMAX®Diesel supplement for additional
and speci c information on this engine.
Keep this manual in the vehicle for quick reference.
Canadian Owners
A French language copy of this manual can be obtained
from your dealer/retailer or from:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
1-800-551-4123
helminc.com
Propriétaires Canadiens
On peut obtenir un exemplaire de ce guide en français
auprès de concessionnaire ou à l’adresse suivante:
Helm Incorporated
P.O. Box 07130
Detroit, MI 48207
1-800-551-4123
helminc.com
Litho in U.S.A.
Part No. 15911381 A First Printing
©2008 General Motors Corporation. All Rights Reserved.
iii
Vehicle Symbol Chart
Here are some additional symbols that may be found on
the vehicle and what they mean. For more information
on the symbol, refer to the index.
0:Adjustable Pedals
9:Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
g:Audio Steering Wheel Controls or OnStar®
$:Brake System Warning Light
":Charging System
I:Cruise Control
B:Engine Coolant Temperature
O:Exterior Lamps
#:Fog Lamps
.:Fuel Gage
+:Fuses
i:Headlamp High/Low-Beam Changer
j:LATCH System Child Restraints
*:Malfunction Indicator Lamp
::Oil Pressure
g:Outside Power Foldaway Mirrors
}:Power
/:Remote Vehicle Start
>:Safety Belt Reminders
7:Tire Pressure Monitor
_:Tow/Haul Mode
F:Traction Control
M:Windshield Washer Fluid
v
Keys...............................................................2-3
Remote Keyless Entry (RKE) System................2-4
Remote Keyless Entry (RKE) System
Operation...................................................2-5
Remote Vehicle Start......................................2-7
Doors and Locks............................................2-10
Door Locks..................................................2-10
Power Door Locks........................................2-10
Delayed Locking...........................................2-11
Programmable Automatic Door Locks..............2-11
Rear Door Security Locks..............................2-11
Lockout Protection........................................2-12
Rear Doors..................................................2-12
Tailgate.......................................................2-13
Windows........................................................2-15
Manual Windows..........................................2-16
Power Windows............................................2-16
Power Sliding Rear Window...........................2-17
Sun Visors...................................................2-18
Theft-Deterrent Systems..................................2-18
Content Theft-Deterrent.................................2-18
PASS-Key
®III+ Electronic Immobilizer.............2-20
PASS-Key®III+ Electronic Immobilizer
Operation.................................................2-20Starting and Operating Your Vehicle................2-22
New Vehicle Break-In....................................2-22
Ignition Positions..........................................2-22
Retained Accessory Power (RAP)...................2-23
Starting the Engine.......................................2-24
Fast Idle System..........................................2-25
Adjustable Throttle and Brake Pedal................2-26
Engine Coolant Heater..................................2-27
Active Fuel Management™.............................2-28
Automatic Transmission Operation...................2-28
Tow/Haul Mode............................................2-34
Four-Wheel Drive..........................................2-37
Parking Brake..............................................2-50
Shifting Into Park..........................................2-52
Shifting Out of Park......................................2-54
Parking Over Things That Burn.......................2-54
Engine Exhaust............................................2-55
Running the Vehicle While Parked..................2-56
Mirrors...........................................................2-57
Manual Rearview Mirror.................................2-57
Automatic Dimming Rearview Mirror................2-57
Outside Manual Mirrors..................................2-58
Outside Towing Mirrors..................................2-58
Outside Power Mirrors...................................2-59
Outside Power Foldaway Mirrors.....................2-59
Section 2 Features and Controls
2-1
Remote Keyless Entry (RKE)
System Operation
The Remote Keyless Entry (RKE) transmitter functions
work up to 195 feet (60 m) away from the vehicle.
There are other conditions which can affect the
performance of the transmitter. SeeRemote Keyless
Entry (RKE) System on page 2-4.
/(Remote Vehicle Start):For vehicles with this
feature, press
/to start the engine from outside the
vehicle using the RKE transmitter. SeeRemote Vehicle
Start on page 2-7for additional information.
Q(Lock):Press to lock all the doors.
If enabled through the Driver Information Center (DIC),
the turn signal lamps ash once to indicate locking
has occurred. If enabled through the DIC, the horn
chirps when
Qis pressed again within three seconds.
SeeDIC Vehicle Customization (With DIC Buttons)
on page 3-76for additional information.
Pressing
Qarms the content theft-deterrent system.
SeeContent Theft-Deterrent on page 2-18.
K(Unlock):Press once to unlock only the driver door.
If
Kis pressed again within three seconds, all remaining
doors unlock. The interior lamps may come on and stay
on for 20 seconds or until the ignition is turned on.
With Remote Start
(Without Remote Start
Similar)
2-5