
Seats and Restraint Systems
....................... 7
Front Seats
.............................................. 9
Rear Seats
............................................. 20
Safety Belts
............................................ 22
Child Restraints
...................................... 45
Airbag System
........................................ 83
Restraint System Check
....................... 104
Features and Controls
.............................. 107
Keys
..................................................... 109
Doors and Locks
.................................. 118
Windows
............................................... 124
Theft-Deterrent Systems
....................... 127
Starting and Operating Your Vehicle
..... 132
Mirrors
.................................................. 169
OnStar
®System
................................... 180
Universal Home Remote System
.......... 184
Storage Areas
...................................... 196
Sunroof
................................................ 200Instrument Panel
....................................... 203
Instrument Panel Overview
................... 206
Climate Controls
................................... 234
Warning Lights, Gages, and
Indicators
.......................................... 246
Driver Information Center (DIC)
............ 267
Audio System(s)
................................... 300
Driving Your Vehicle
................................. 373
Your Driving, the Road, and
Your Vehicle
..................................... 374
Towing
................................................. 439
Service and Appearance Care
.................. 483
Service
................................................. 486
Fuel
...................................................... 488
Checking Things Under the Hood
......... 496
Rear Axle
............................................. 538
Four-Wheel Drive
.................................. 539
Front Axle
............................................ 541
2007 GMC Sierra Owner ManualM
1

Automatic Dimming Rearview Mirror with
Compass and Temperature Display........ 173
Outside Manual Mirrors............................. 174
Outside Trailer-Tow Mirrors....................... 175
Outside Power Mirrors............................... 176
Outside Power Foldaway Mirrors............... 177
OnStar
®System.......................................... 180
Universal Home Remote System................ 184
System Identi cation.................................. 184
Universal Home Remote System............... 185
Universal Home Remote System Operation
(With One Triangular LED)...................... 185
Universal Home Remote System
Operation (With Three Round LED)....... 189Storage Areas............................................. 196
Glove Box................................................. 196
Cupholder(s).............................................. 196
Instrument Panel Storage Area.................. 197
Center Console Storage Area.................... 197
Luggage Carrier........................................ 198
Rear Seat Armrest.................................... 199
Cargo Management System...................... 199
Sunroof....................................................... 200
Section 2 Features and Controls
108

Key In the Ignition
Never leave your vehicle with the keys inside, as it
is an easy target for joy riders or thieves. If you
leave the key in the ignition and park your vehicle,
a chime will sound, when you open the driver’s
door. Always remember to remove your key from
the ignition and take it with you. This will lock
your ignition and transmission. Also, always
remember to lock the doors.
The battery could be drained if you leave the key
in the ignition while your vehicle is parked.
You may not be able to start your vehicle after it
has been parked for an extended period of time.
Retained Accessory Power (RAP)
Your vehicle has a Retained Accessory Power
(RAP) feature which will allow certain features on
your vehicle to continue to work up to 10 minutes
after the ignition key is turned to LOCK.
The radio, power windows, and if the vehicle has a
sunroof and the OnStar
®System, will work when
the ignition key is in RUN or ACCESSORY. Once
the key is turned from RUN to LOCK, the windows
and sunroof will continue to work until a door is
opened. The radio will continue to work for up to
10 minutes or until the driver’s door is opened.
Starting the Engine
If your vehicle has the DURAMAX®Diesel engine,
see the DURAMAX®Diesel manual for more
information.
To place the transmission in the proper gear:
Move your shift lever to PARK (P) or NEUTRAL (N).
Your engine will not start in any other position -- this
is a safety feature. To restart when you are already
moving, use NEUTRAL (N) only.
Starting Procedure
1. With your foot off the accelerator pedal, turn
the ignition key to START. When the engine
starts, let go of the key. The idle speed will go
down as your engine gets warm. Do not
race the engine immediately after starting it.
Operate the engine and transmission gently to
allow the oil to warm up and lubricate all
moving parts.
134

The rails are notched at each end which allows
the tie-downs to be removed and placed on
another rail. To remove, pull the locator pin out
and slide the tie-down to the end of the rail
and pull back.
To remove or install cargo tie-downs at the front of
the bed, slide the corner cap towards the center of
the bed to expose the rail notches. To remove the
corner cap, pull either edge away from the rail.
To remove the system, loosen the toggle bolts
on each rail until they can be removed from the
bed of the truck. To replace the system, place the
toggle bolts and rails into their original locations
and tighten them to a torque setting of
12.5 ft-lbs (17
Y).
If the system is removed to install a bed liner,
make sure there is no bed liner material in
the installation points.
Notice:If you tie down cargo using the
horizontal slots on the top of the pickup box,
you may damage the box. Using the horizontal
slots on the top of the pickup box for tie-down
locations may cause damage to the pickup box
and would not be covered by your warranty.
Only use the tie-down loops if you do not have
the cargo management system.
Sunroof
If your vehicle has a power sliding sunroof, the
ignition needs to be turned to RUN, or the
Retained Accessory Power (RAP) must be
activated to open or close the sunroof. When RAP
is active, the sunroof will work for 10 minutes
after the ignition is turned off, or until the driver’s
door is opened. SeeRetained Accessory
Power (RAP) on page 134for more information.
Extended Cab
If your vehicle is an
extended-cab, the
sunroof switch is located
on the headliner above
the rearview mirror.
Vent:From the closed position, press and hold the
rear of the switch to vent the sunroof. To close the
sunroof, press and hold the front of the switch.
200