tow GMC SIERRA 2007 Owner's Manual

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

Rear Seats
Rear Seat Operation (Full Bench)
Folding the Rear Seat
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. Pull up 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.
To fold the seat down, do the following:
1. Push the seat cushion rearward 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.
20

Rear Seat Operation (Split Bench)
Folding Rear Seat
On a vehicle with a second row 60/40 split seat
either side of the rear seat may be folded for
added cargo space.
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.
Make sure that nothing is on the seat.
To fold the seat, slowly pull the seat cushion up.
To return the seat to the normal seating position,
slowly pull the seat cushion down.
{CAUTION:
A safety belt that is improperly routed, not
properly attached, or twisted will not
provide the protection needed in a crash.
The person wearing the belt could be
seriously injured. After raising the rear
seatback, always check to be sure that the
safety belts are properly routed and
attached, and are not twisted.
Make sure that the safety belt buckles on the
driver’s side seatback are accessible to the
outboard and center occupant and are not under
the seat cushions.
21

{CAUTION:
Never do this.
Here two children are wearing the same
belt. The belt cannot properly spread the
impact forces. In a crash, the two children
can be crushed together and seriously
injured. A belt must be used by only one
person at a time.
Q:What if a child is wearing a lap-shoulder
belt, but the child is so small that the
shoulder belt is very close to the child’s
face or neck?
A:If the child is sitting in a seat next to a
window, move the child toward the center of
the vehicle. Also seeRear Safety Belt
Comfort Guides on page 41. If the child is
sitting in the center rear seat passenger
position, move the child toward the safety belt
buckle. In either case, be sure that the
shoulder belt still is on the child’s shoulder, so
that in a crash the child’s upper body would
have the restraint that belts provide.
46

{CAUTION:
The body structure of a young child is
quite unlike that of an adult or older child,
for whom the safety belts are designed. A
young child’s hip bones are still so small
that the vehicle’s regular safety belt may
not remain low on the hip bones, as it
should. Instead, it may settle up around
the child’s abdomen. In a crash, the belt
would apply force on a body area that is
unprotected by any bony structure. This
alone could cause serious or fatal injuries.
Young children always should be secured
in appropriate child restraints.
Child Restraint Systems
An infant car bed (A), a special bed made for use
in a motor vehicle, is an infant restraint system
designed to restrain or position a child on a
continuous at surface. Make sure that the infant’s
head rests toward the center of the vehicle.
51

CAUTION: (Continued)
A child or others could be injured if this
happens. To help prevent injury to people
and damage to your vehicle, attach only
one child restraint per anchor.
{CAUTION:
Children can be seriously injured or
strangled if a shoulder belt is wrapped
around their neck and the safety belt
continues to tighten. Secure any unused
safety belts behind the child restraint so
children cannot reach them. Pull the
shoulder belt all the way out of the
retractor to set the lock, if your vehicle
has one, after the child restraint has been
installed. Be sure to follow the
instructions of the child restraint
manufacturer.Notice:Contact between the child restraint or
the LATCH attachment parts and the vehicle’s
safety belt assembly may cause damage to
these parts. Make sure when securing unused
safety belts behind the child restraint that
there is no contact between the child restraint
or the LATCH attachment parts and the
vehicle’s safety belt assembly.
Folding an empty rear seat with the safety
belts secured may cause damage to the safety
belt or the seat. When removing the child
restraint, always remember to return the safety
belts to their normal, stowed position before
folding the rear seat.
63

The threshold level can vary, however, with
specic vehicle design, so that it can be somewhat
above or below this range. Vehicle’s with dual
stage airbags also have a sensor which enables
the sensing system to monitor the position of
the driver seat. The seat position sensor provides
information which is used to determine if the
airbags should deploy at a reduced level or at full
deployment.
What Makes an Airbag Inate?
In an impact of sufficient severity, the airbag
sensing system detects that the vehicle is
in a crash. In the case of a roof-mounted rollover
airbag, the sensing system detects that the
vehicle is about to roll over or has been in a severe
frontal impact or a moderate to severe side
impact. The sensing system triggers a release of
gas from the inator, which inates the airbag.
The inator, airbag, and related hardware are all
part of the airbag modules inside the steering
wheel and in the instrument panel in front of the
right front passenger. For vehicles with
roof-mounted rollover airbags, the airbag modules
are located in the ceiling of the vehicle, near
the side windows.
How Does an Airbag Restrain?
In moderate to severe frontal or near frontal
collisions, even belted occupants can contact the
steering wheel or the instrument panel. In
moderate to severe side collisions, even belted
occupants can contact the inside of the vehicle.
Airbags supplement the protection provided
by safety belts. Airbags distribute the force of the
impact more evenly over the occupant’s upper
body, stopping the occupant more gradually. But
the frontal airbags would not help you in many
types of collisions, including rollovers, rear
impacts, and many side impacts, primarily because
an occupant’s motion is not toward the airbag.
Roof-mounted rollover airbags would not help you
in many types of collisions, including many
frontal or near frontal collisions, and rear impacts.
Airbags should never be regarded as anything
more than a supplement to safety belts, and then
only in moderate to severe frontal or near-frontal
collisions for the driver’s and right front
passenger’s frontal airbags, and only in moderate
to severe side collisions or rollovers for vehicles
with roof-mounted rollover airbags.
91

See “Safety Belts” and “Child Restraints” in the
Index for additional information about the
importance of proper restraint use.
{CAUTION:
If the airbag readiness light in the
instrument panel cluster ever comes on
and stays on, it means that something
may be wrong with the airbag system. If
this ever happens, have the vehicle
serviced promptly, because an adult-size
person sitting in the right front
passenger’s seat may not have the
protection of the airbag(s). SeeAirbag
Readiness Light on page 250for more on
this, including important safety
information.A thick layer of additional material, such as a
blanket or cushion, or aftermarket equipment such
as seat covers, seat heaters, and seat massagers
can affect how well the passenger sensing
system operates. You may want to consider not
using seat covers or other aftermarket equipment.
SeeAdding Equipment to Your Airbag-Equipped
Vehicle on page 102for more information
about modications that can affect how the system
operates.
{CAUTION:
Stowing of articles under the passenger’s
seat or between the passenger’s seat
cushion and seatback may interfere with
the proper operation of the passenger
sensing system.
101

Keys............................................................ 109
Remote Keyless Entry (RKE) System........ 110
Remote Keyless Entry (RKE) System
Operation............................................... 111
Doors and Locks........................................ 118
Door Locks................................................ 118
Power Door Locks..................................... 119
Delayed Locking........................................ 119
Programmable Automatic Door Locks........ 119
Rear Door Security Locks......................... 120
Lockout Protection..................................... 120
Rear Doors............................................... 121
Tailgate..................................................... 122
Windows...................................................... 124
Manual Windows....................................... 124
Power Windows........................................ 125
Power Sliding Rear Window...................... 126
Sun Visors................................................ 127
Theft-Deterrent Systems............................. 127
Content Theft-Deterrent............................. 128
PASS-Key
®III+......................................... 129
PASS-Key®III+ Operation......................... 130Starting and Operating Your Vehicle......... 132
New Vehicle Break-In................................ 132
Ignition Positions....................................... 133
Retained Accessory Power (RAP)............. 134
Starting the Engine.................................... 134
Adjustable Throttle and Brake Pedal.......... 136
Engine Coolant Heater.............................. 136
Active Fuel Management™........................ 138
Automatic Transmission Operation............. 138
Tow/Haul Mode......................................... 144
Four-Wheel Drive...................................... 147
Parking Brake........................................... 162
Shifting Into Park (P)................................. 163
Shifting Out of Park (P)............................. 165
Parking Over Things That Burn................. 166
Engine Exhaust......................................... 167
Running the Engine While Parked............. 168
Mirrors......................................................... 169
Manual Rearview Mirror............................. 169
Automatic Dimming Rearview Mirror with
OnStar
®, Compass and Temperature
Display................................................... 169
Section 2 Features and Controls
107

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 Identication.................................. 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