2007 GMC SIERRA light

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

Vehicle Damage Warnings
Also, in this manual you will nd these notices:
Notice:These mean there is something
that could damage your vehicle.
A notice tells about something that can damage
the vehicle. Many times, this damage would not be
covered by your vehicle’s warranty, and it could
be costly. But the notice will tell 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.
There are also warning labels on the vehicle. They
use the same words, CAUTION or NOTICE.
Vehicle Symbols
The vehicle has components and labels that use
symbols instead of text. Symbols are shown along
with the text describing the operation or
information relating to a specic component,
control, message, gage, or indicator.
If you need help guring out a specic 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
5

Release the control when the lower seatback
reaches the desired level of lumbar support.
Your vehicle may have a memory function which
allows seat settings to be saved and recalled.
SeeMemory Seat, Mirrors, and Pedals on page 13
for more information.
Keep in mind that as your seating position
changes, as it may during long trips, so should the
position of your lumbar support. Adjust the seat
as needed.
Heated Seats
On vehicles with heated
front seats, the controls
are located on the
driver’s and passenger’s
doors, near the door
handle.
I(Heated Seatback):Press this button to turn
on the heated seatback.
The light on the button will come on to indicate
that the feature is working. Press the button
to cycle through the temperature settings of high,
medium, and low and to turn the heat to the
seatback off. Indicator lights below the button show
the level of heat selected: three for high, two for
medium, and one for low.
J(Heated Seat and Seatback):Press this
button to turn on the heated seat and seatback.
The light on the button will come on to indicate that
the feature is working. Press the button to cycle
through the temperature settings of high, medium,
and low and to turn the heat to the seat off.
Indicator lights above the button will show the level
of heat selected: three for high, two for medium,
and one for low.
The heated seats will be canceled ten seconds
after the ignition is turned off. If you want to
use the heated seat feature after you restart your
vehicle, you will need to press the appropriate
heated seat or seatback button again.
12

Safety Belts
Safety Belts: They Are for Everyone
This part of the manual tells you how to use
safety belts properly. It also tells you some things
you should not do with safety belts.
{CAUTION:
Do not let anyone ride where he or she
cannot wear a safety belt properly. If you
are in a crash and you are not wearing a
safety belt, your injuries can be much
worse. You can hit things inside the
vehicle or be ejected from it. You can be
seriously injured or killed. In the same
crash, you might not be, if you are
buckled up. Always fasten your safety
belt, and check that your passengers’
belts are fastened properly too.
{CAUTION:
It is extremely dangerous to ride in a
cargo area, inside or outside of a vehicle.
In a collision, people riding in these areas
are more likely to be seriously injured or
killed. Do not allow people to ride in any
area of your vehicle that is not equipped
with seats and safety belts. Be sure
everyone in your vehicle is in a seat and
using a safety belt properly.
Your vehicle has a light
that comes on as a
reminder to buckle up.
SeeSafety Belt
Reminder Light on
page 249.
22

Driver Position
Lap-Shoulder Belt
The driver has a lap-shoulder belt. Here is how to
wear it properly.
1. Close and lock the door.
2. Adjust the seat so you can sit up straight. To
see how, see “Seats” in the Index.
3. Pick up the latch plate and pull the belt across
you. Do not let it get twisted.The lap-shoulder belt may lock if you pull the
belt across you very quickly. If this happens,
let the belt go back slightly to unlock it.
Then pull the belt across you more slowly.
4. Push the latch plate into the buckle until
it clicks.
Pull up on the latch plate to make sure it is
secure. If the belt is not long enough,
seeSafety Belt Extender on page 44.
Make sure the release button on the buckle is
positioned so you would be able to unbuckle
the safety belt quickly if you ever had to.
5. Move the shoulder belt height adjuster to the
height that is right for you. Improper shoulder
belt height adjustment could reduce the
effectiveness of the safety belt in a crash. See
Shoulder Belt Height Adjustment on page 35.
28

Rear Seat Passengers
It is very important for rear seat passengers to
buckle up! Accident statistics show that unbelted
people in the rear seat are hurt more often in
crashes than those who are wearing safety belts.
Rear passengers who are not safety belted
can be thrown out of the vehicle in a crash. And
they can strike others in the vehicle who are
wearing safety belts.
Lap-Shoulder Belt
All rear seat positions have lap-shoulder belts.
Here is how to wear one properly.
1. Pick up the latch plate and pull the belt across
you. Do not let it get twisted.
The shoulder belt may lock if you pull the belt
across you very quickly. If this happens, let
the belt go back slightly to unlock it. Then pull
the belt across you more slowly.
2. Push the latch plate into the buckle until it
clicks.
Pull up on the latch plate to make sure it is
secure.
39

Securing a Child Restraint in the
Right Front Seat Position (With
Airbag Off Switch)
Your vehicle has a right front passenger airbag. If
one of the switches pictured in the following
illustrations is located in your glove box, your
vehicle has an airbag on-off switch that you can
use to manually turn on or off the right front
passenger’s airbag.Your switch may vary slightly. SeeAirbag Off
Switch on page 93for more on this, including
important safety information and illustrations of
alternate switch designs.
{CAUTION:
A child in a rear-facing child restraint can
be seriously injured or killed if the
passenger’s airbag inates. This is
because the back of the rear-facing child
restraint would be very close to the
inating airbag. Do not use a rear-facing
child restraint in this vehicle unless the
passenger’s airbag has been turned off.
Even though the airbag off switch is
designed to turn off the passenger’s
frontal airbag, no system is fail-safe, and
no one can guarantee that an airbag will
not deploy under some unusual
circumstance, even though it is turned off.
CAUTION: (Continued)
United StatesCanada
70

A rear seat is a safer place to secure a forward
facing child restraint. SeeWhere to Put the
Restraint on page 56. If you need to secure a
forward-facing child restraint in the right front seat
position, move the seat as far back as it will go
before securing a forward-facing child restraint.
SeeManual Seats on page 9orPower Seats on
page 10.
{CAUTION:
If the airbag readiness light in the
instrument panel cluster ever comes on
when you have turned off the airbag, it
means that something may be wrong with
the airbag system. The right front
passenger’s airbag could inate even
though the switch is off. If this ever
happens, have the vehicle serviced
promptly. Until you have the vehicle
CAUTION: (Continued)
CAUTION: (Continued)
serviced, do not let anyone whom the
national government has identied as a
member of a passenger airbag risk group
sit in the right front passenger’s position
(for example, do not secure a rear-facing
child restraint in the right front
passenger’s seat). SeeAirbag Off Switch
on page 93.
If your child restraint has the LATCH system, see
Lower Anchors and Tethers for Children
(LATCH) on page 58.
If your vehicle has a rear seat, there is no top
tether anchor at the right front seating position. Do
not secure a child seat in this position if a
national or local law requires that the top tether be
anchored or if the instructions that come with
the child restraint say that the top tether must be
anchored. SeeLower Anchors and Tethers for
Children (LATCH) on page 58if the child restraint
has a top tether.
72