The names, logos, emblems,
slogans, vehicle model names, and
vehicle body designs appearing in
this manual including, but not limited
to, GM, the GM logo, GMC, the
GMC Truck Emblem, SIERRA, and
DENALI are trademarks and/or
service marks of General Motors
LLC, its subsidiaries, affiliates,
or licensors.
This manual describes features that
may or may not be on your specific
vehicle either because they are
options that you did not purchase or
due to changes subsequent to the
printing of this owner manual.
Litho in U.S.A.
Part No. 20902917 A First Printing
Please refer to the purchase
documentation relating to your
specific vehicle to confirm each of
the features found on your vehicle.
For vehicles first sold in Canada,
substitute the name “General
Motors of Canada Limited” for GMC
Division wherever it appears in this
manual.
If the vehicle has the Duramax
®
Diesel engine, see the Duramax
diesel supplement for additional and
specific information on this engine.
Keep this manual in the vehicle for
quick reference.
A French language copy of this
manual can be obtained from your
dealer or from:
On peut obtenir un exemplaire de
ce guide en français auprès du
concessionnaire ou à l'adresse
suivante:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
1-800-551-4123
Numéro de poste 6438 de langue
française
www.helminc.com
Page 4
Blackplate(4,1)
GMCSierraDenaliOwnerManual-2012
ivIntroduction
Using this Manual
To quickly locate information about
the vehicle, use the Index in the
back of the manual. It is an
alphabetical list of what is in the
manual and the page number where
it can be found.
Danger, Warnings, and
Cautions
Warning messages found on vehicle
labels and in this manual describe
hazards and what to do to avoid or
reduce them.
Danger indicates a hazard with a
high level of risk which will result in
serious injury or death.
Warning or Caution indicates a
hazard that could result in injury or
death.
WARNING
{
These mean there is something
that could hurt you or other
people.
Notice: This means there is
something that could result in
property or vehicle damage. This
would not be covered by the
vehicle's warranty.
A circle with a slash through it is a
safety symbol which means “Do
Not,” “Do not do this,” or “Do not let
this happen.”
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 specific
component, control, message,
gauge, or indicator.
M : This symbol is shown when
you need to see your owner manual
for additional instructions or
information.
* : This symbol is shown when
you need to see a service manual
for additional instructions or
information.
Page 5
Blackplate(5,1)
GMCSierraDenaliOwnerManual-2012
Introductionv
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.
Buttons. See Driver InformationCenter (DIC) on page 5‑28.
H. Infotainment on page 7‑2.
I.Exterior Lamp Controls on
page 6‑1.
J. Integrated Trailer Brake
Controller (If Equipped). See
Trailer Towing on page 9‑71.
K. Dome Lamps on page 6‑7.
L. Data Link Connector (DLC)
(Out of View). See MalfunctionIndicator Lamp on page 5‑20.
M. Cruise Control on page 9‑49.
Heated Steering Wheel Button
(If Equipped). See HeatedSteering Wheel on page 5‑5.
N. Hood Release. See Hood on
page 10‑5.
O. Parking Brake on page 9‑44.
P. Steering Wheel Adjustment on
page 5‑2.
Q. Horn on page 5‑5.
R. Steering Wheel Controls on
page 5‑3.
S. Dual Automatic Climate Control
System on page 8‑1.
T. Power Outlets on page 5‑10.
Cigarette Lighter (If Equipped).
See Ashtrays on page 5‑11 and
Cigarette Lighter on page 5‑10.
U. StabiliTrak
®
System on
page 9‑46.
Pedal Adjust Button. See
Adjustable Throttle and Brake
Pedal on page 9‑26.
Ultrasonic Parking Assist on
page 9‑52 (If Equipped).
Exhaust Brake (If Equipped).
See “Brakes” in the Duramax
Diesel Supplement.
V. Passenger Airbag Off Control
(If Equipped). See PassengerSensing System on page 3‑27.
Page 10
Blackplate(4,1)
GMCSierraDenaliOwnerManual-2012
1-4In Brief
Initial Drive
Information
This section provides a brief
overview about some of the
important features that may or may
not be on your specific vehicle.
For more detailed information, refer
to each of the features which can be
found later in this owner manual.
Remote Keyless Entry
(RKE) System
The RKE transmitter is used to
remotely lock and unlock the doors
from up to 60 m (195 ft) away from
the vehicle.
K : Press to unlock the driver door.
Press
K again within three seconds
to unlock all remaining doors.
Q : Press to lock all doors.
Lock and unlock feedback can
be personalized. See VehiclePersonalization on page 5‑45.
L : Press and release to locate
the vehicle. Press
more than two seconds to sound the
panic alarm. Press
cancel the panic alarm.
L and hold for
L again to
See Keys on page 2‑2 and Remote
Keyless Entry (RKE) System
Operation on page 2‑3.
Remote Vehicle Start
With this feature the engine can be
started from outside of the vehicle.
Starting the Vehicle
1. Aim the RKE transmitter at the
vehicle.
2. Press and release
3. Immediately after completing
Step 2, press and hold
the turn signal lamps flash.
When the vehicle starts, the parking
lamps will turn on and remain on as
long as the engine is running. The
doors will be locked and the climate
control system may come on.
The engine will continue to run for
10 minutes. Repeat the steps for a
10-minute time extension. Remote
start can be extended only once.
Q.
/ until
Page 11
Blackplate(5,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-5
Canceling a Remote Start
To cancel a remote start:
.
Aim the RKE transmitter at the
vehicle and press and hold
until the parking lamps turn off.
.
Turn on the hazard warning
flashers.
.
Turn the ignition on and then
back off.
See Remote Vehicle Start onpage 2‑5.
/
Door Locks
There are several ways to lock and
unlock the vehicle.
From outside, use the Remote
Keyless Entry (RKE) transmitter or
the key in the driver door.
From inside, use the power door
locks or the manual door locks.
To lock or unlock the door with the
manual locks, push down or pull up
on the manual lock knob.
Power Door Locks
If available, the switches are on the
front doors.
K : Press to unlock the doors.Q : Press to lock the doors.
See Door Locks on page 2‑8.
Windows
Power Windows
The power window switches are
located on each door.
The driver door also has a switch
for the passenger window and
rear windows.
Press the switch to lower the
window. Pull the switch up to
raise it.
See Windows on page 2‑16 or
Power Windows on page 2‑17.
Page 12
Blackplate(6,1)
GMCSierraDenaliOwnerManual-2012
1-6In Brief
Power Sliding Rear Window
On vehicles with a power sliding
rear window, the switch is located in
the overhead console. See RearWindows on page 2‑18.
.
Push to open the window.
.
Pull to close the window.
The power sliding rear window
cannot be operated manually.
Seat Adjustment
To adjust the seat:
.
Move the seat forward or
rearward by sliding the control
forward or rearward.
.
Raise or lower the front or rear
part of the seat cushion by
moving the front or rear of the
control up or down.
.
Raise or lower the entire seat by
moving the entire control up
or down.
See Power Seat Adjustment onpage 3‑3 for more information.
Lumbar Adjustment
To adjust the lumbar support:
.
Press and hold the front or rear
of the control to increase or
decrease lumbar support.
.
Press and hold the top or bottom
of the control to raise or lower
the height of the support.
See Lumbar Adjustment onpage 3‑3 for more information.
Page 13
Blackplate(7,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-7
Reclining Seatbacks
To adjust the seatback:
.
Tilt the top of the control
rearward to recline.
.
Tilt the top of the control forward
to raise.
See Reclining Seatbacks onpage 3‑4 for more information.
Memory Features
The controls on the driver door are
used to program and recall memory
settings for the driver seat, outside
mirrors, and the adjustable throttle
and brake pedals, if available.
Storing Memory Positions
To save into memory:
1. Adjust the driver seat and
seatback recliner, both outside
mirrors, and the throttle and
brake pedals, if available.
See Power Mirrors on page 2‑14
and Adjustable Throttle andBrake Pedal on page 9‑26 for
more information.
Not all mirrors and adjustable
throttles and brake pedals will
have the ability to save and
recall their positions.
2. Press and hold “1” until
two beeps sound.
3. Repeat for a second driver
position using “2.”
To recall, press and release “1” or
“2.” The vehicle must be in P (Park).
A single beep will sound. The seat,
outside mirrors, and adjustable
throttle and brake pedals,
if available, will move to the
position previously stored for the
identified driver.
See Memory Seats on page 3‑5 and
Vehicle Personalization on
page 5‑45 for more information.
Page 14
Blackplate(8,1)
GMCSierraDenaliOwnerManual-2012
1-8In Brief
Easy Exit Driver Seat
This feature can move the seat
rearward to allow extra room to exit
the vehicle.
B : Press to recall the easy exit
seat position. The vehicle must be
in P (Park).
See Memory Seats on page 3‑5 and
Vehicle Personalization on
page 5‑45 for more information.
Heated and Ventilated
Seats
The buttons are on the front doors.
H : Press to cool the seat.
I : Press to heat the
seatback only.
J : Press to heat the seat and
seatback.
Press the button once for the
highest setting. With each press of
the button, the seat will change to
the next lower setting, and then to
the off setting. The lights indicate
three for the highest setting and one
for the lowest.
See Heated and Ventilated FrontSeats on page 3‑7.
Head Restraint
Adjustment
Do not drive until the head restraints
for all occupants are installed and
adjusted properly.
To achieve a comfortable seating
position, change the seatback
recline angle as little as necessary
while keeping the seat and the head
restraint height in the proper
position.
For more information see Head
Restraints on page 3‑2 and Power
Seat Adjustment on page 3‑3.
Page 15
Blackplate(9,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-9
Safety Belts
Refer to the following sections for
important information on how to use
safety belts properly.
.
Safety Belts on page 3‑9.
.
How to Wear Safety Belts
Properly on page 3‑11.
.
Lap-Shoulder Belt on page 3‑12.
.
Lower Anchors and Tethers for
Children (LATCH System) on
page 3‑44.
Passenger Sensing
System
The passenger sensing system,
if equipped, turns off the front
outboard passenger frontal airbag
under certain conditions. No other
airbag is affected by the passenger
sensing system.
If the vehicle has one of the
indicators pictured in the following
illustrations, then the vehicle has a
passenger sensing system for the
right front passenger position.
The passenger airbag status
indicator, if equipped, will be visible
on the overhead console when the
vehicle is started.
United States
Canada and Mexico
See Passenger Sensing System on
page 3‑27 for important information.
Page 16
Blackplate(10,1)
GMCSierraDenaliOwnerManual-2012
1-10In Brief
Mirror Adjustment
Exterior Mirrors
Vehicles with outside power mirrors
and foldaway mirrors have controls
located on the driver door.
1. Press (A) or (B) to select the
driver or passenger side mirror.
2. Press the arrows on the control
pad to move the mirror up,
down, left, or right.
3. Press either (A) or (B) again to
deselect the mirror.
Power Foldaway Mirrors
To fold the mirrors:
1. Press (C) to fold the mirrors out
to the driving position.
2. Press (D) to fold the mirrors in to
the folded position.
See Power Mirrors on page 2‑14.
Interior Mirror
Hold the mirror in the center to
move it for a clearer view of behind
your vehicle. Adjust the mirror to
avoid glare from the headlamps
behind you. Push the tab at the
bottom of the mirror forward for
daytime use and pull it for
nighttime use.
See Manual Rearview Mirror onpage 2‑16.
Vehicles with the automatic dimming
feature will automatically reduce
headlamp glare. The dimming
feature comes on and the indicator
displays each time the vehicle is
started.
See Automatic Dimming RearviewMirror on page 2‑16.
Page 17
Blackplate(11,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-11
Steering Wheel
Adjustment
The tilt lever is located on the lower
left side of the steering column.
To adjust the steering wheel:
1. Hold the steering wheel and pull
the lever.
2. Move the steering wheel to a
comfortable position.
3. Release the lever to lock the
wheel in place.
See Steering Wheel Adjustment onpage 5‑2.
Throttle and Brake Pedal
Adjustment
On vehicles with this feature, you
can change the position of the
throttle and brake pedals.
The control used to adjust the
pedals is located on the instrument
panel below the climate control
system.
Press the bottom of the control to
move the pedals closer. Press the
top of the control to move the
pedals away.
See Adjustable Throttle and BrakePedal on page 9‑26.
Interior Lighting
Dome Lamps
The dome lamps are located in the
overhead console.
They come on when any door is
opened and turn off after all the
doors are closed.
Turn the instrument panel
brightness knob located below the
dome lamp override button,
clockwise to the farthest position to
manually turn on the dome lamps.
The dome lamps remain on until the
knob is turned counterclockwise.
Page 18
Blackplate(12,1)
GMCSierraDenaliOwnerManual-2012
1-12In Brief
Dome Lamp Override
The dome lamp override button is
located next to the exterior lamps
control.
k : Press the button in and the
dome lamps remain off when a door
is opened. Press the button again to
return it to the extended position so
that the dome lamps come on when
a door is opened.
Reading Lamps
For vehicles with reading lamps in
the overhead console, press the
button located next to the lamp to
turn it on or off.
The vehicle may also have reading
lamps in other locations. To turn the
lamps on or off, press the button
located next to the lamp.
For more information about interior
lamps, see:
.
Dome Lamps on page 6‑7.
.
Reading Lamps on page 6‑8.
.
Instrument Panel Illumination
Control on page 6‑7.
Exterior Lighting
The exterior lamps control is located
on the instrument panel to the left of
the steering wheel.
O : Turns off the automatic
headlamps and Daytime Running
Lamps (DRL). Turn the headlamp
control to the off position again to
turn the automatic headlamps or
DRL back on.
For vehicles first sold in Canada,
the off position will only work when
the vehicle is shifted into P (Park).
Page 19
Blackplate(13,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-13
AUTO: Automatically turns on
the headlamps, parking lamps,
taillamps, instrument panel lights,
and license plate lamps.
; : Turns on the parking lamps,
taillamps, instrument panel lights,
and license plate lamps.
5 : Turns on the headlamps,
parking lamps, taillamps, instrument
panel lights, and license plate
lamps.
For more information, see:
.
Exterior Lamp Controls on
page 6‑1.
.
Daytime Running Lamps (DRL)
on page 6‑4.
.
Fog Lamps on page 6‑6.
Windshield Wiper/Washer
The front wiper control is located on
the turn and lane‐change lever.
The windshield wipers are controlled
by turning the band with
z on it.
8 : For a single wipe, turn to 8,
then release. For several wipes,
hold the band on
8 longer.
9 : Turns the windshield
wipers off.
6 : Turn the band up for more
frequent wipes or down for less
frequent wipes.
6 : Slow wipes.? : Fast wipes.L : Push the paddle at the top of
the lever to spray washer fluid on
the windshield.
See Windshield Wiper/Washer onpage 5‑5.
Page 20
Blackplate(14,1)
GMCSierraDenaliOwnerManual-2012
1-14In Brief
Climate Controls
The heating, cooling, and ventilation in the vehicle can be controlled with
this system.
Dual Automatic Climate Control System
A. Driver and Passenger
Temperature Controls
B. Fan Control
C. AUTO (Automatic Operation)
D. Defrost
E. Recirculation
F. Outside Air
G. Air Delivery Mode Control
H. Display
I.Power Button
J. Rear Window Defogger
K. Air Conditioning
L. PASS (Passenger)
See Dual Automatic Climate ControlSystem on page 8‑1.
Page 21
Blackplate(15,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-15
Transmission
Range Selection Mode
The Range Selection Mode button
is located on the shift lever.
To enable Range Selection:
1. Move the column shift lever to
the M (Manual) position. The
current range will appear next to
the M. This is the highest
possible range with all lower
gears accessible. As an
example, when 5 (Fifth) gear is
selected, 1 (First) through
5 (Fifth) gears are available.
2. Press the plus/minus buttons to
select the range of gears for
current driving conditions. See
Manual Mode on page 9‑36.
While using Range Selection Mode,
cruise control and the Tow/Haul
mode can be used.
Grade Braking is not available when
Range Selection Mode is active.
See Tow/Haul Mode on page 9‑37.
Page 22
Blackplate(16,1)
GMCSierraDenaliOwnerManual-2012
1-16In Brief
Four-Wheel Drive
If the vehicle has Four-Wheel Drive,
you can send the engine's driving
power to all four wheels for extra
traction.
Electronic Transfer Case
The transfer case knob is located
next to the steering column.
You can choose among four driving
settings:
2
m (Two-Wheel Drive High):
This setting is used for driving in
most street and highway situations.
4
m (Four-Wheel Drive High):
Use the Four-Wheel Drive High
position when extra traction is
needed, such as on snowy or icy
roads or in most off-road situations.
n (Four-Wheel Drive Low):
4
This setting sends maximum power
to all four wheels. You might choose
Four-Wheel Drive Low while driving
off-road in deep sand, deep mud,
deep snow, and while climbing or
descending steep hills.
N (Neutral): Shift the vehicle's
transfer case to N (Neutral) only
when towing the vehicle. See
Recreational Vehicle Towing on
page 10‑87 or Towing the Vehicle
on page 10‑87 for more information.
See Four-Wheel Drive on
page 9‑38.
Page 23
Blackplate(17,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-17
Vehicle Features
Radio(s)
Radio with USB, CD, and DVD (MP3)
O : Press to turn the system on
and off. Turn to increase or
decrease the volume.
BAND: Press to choose between
FM, AM, or XM™, if equipped.
between the radio station frequency
and the time. While the ignition is
off, press this button to display the
time. Press to display additional text
information related to the current
FM-RDS or XM station; or CD, MP3,
or WMA song. If information is
available during XM, CD, MP3,
or WMA playback, the song title
information displays on the top line
of the display and artist information
displays on the bottom line. When
information is not available, “NO
INFO” displays.
For more information about these
and other radio features, see
Operation on page 7‑3.
For vehicles with a Rear Seat
Entertainment System (RSE) and
Rear Seat Audio System (RSA), see
Rear Seat Entertainment (RSE)
System on page 7‑37 and Rear
Seat Audio (RSA) System on
page 7‑47 for more information.
Page 24
Blackplate(18,1)
GMCSierraDenaliOwnerManual-2012
1-18In Brief
Storing Radio Stations
A maximum of 36 stations can
be stored as favorites using the
six softkeys located below the radio
station frequency tabs and by using
the radio FAV button. Press FAV to
go through up to six pages of
favorites, each having six favorite
stations available per page. Each
page of favorites can contain any
combination of AM, FM, or XM
stations.
For more information, see “Storing
Radio Stations” in AM-FM Radio onpage 7‑9.
Setting the Clock
To set the time and date:
1. Turn the ignition key to ACC/
ACCESSORY or ON/RUN, then
press
O, to turn the radio on.
2. Press
3. Press the softkey located under
4. To increase or decrease the time
For detailed instructions on setting
the clock for the vehicle's specific
audio system, see Clock onpage 5‑8.
H to display HR, MIN,
MM, DD, and YYYY (hour,
minute, month, day, and year).
any one of the labels to be
changed.
or date, turn
counter‐clockwise.
f clockwise or
Satellite Radio
XM is a satellite radio service based
in the 48 contiguous United States
and 10 Canadian provinces.
XM satellite radio has a wide
variety of programming and
commercial-free music, coast to
coast, and in digital-quality sound.
A fee is required to receive the
XM service.
For more information, refer to:
.
www.xmradio.com or call
1-800-929-2100 (U.S.)
.
www.xmradio.ca or call
1-877-438-9677 (Canada)
See Satellite Radio on page 7‑11.
Page 25
Blackplate(19,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-19
Portable Audio Devices
This vehicle may have an auxiliary
input located on the radio faceplate
and a USB port located in the center
console or on the instrument panel.
External devices such as an iPod
laptop computer, MP3 player, CD
changer, or USB storage device can
be connected to the auxiliary port
using a 3.5 mm (1/8 in) input cable
or the USB port depending on the
audio system.
See “Using the Auxiliary Input Jack”
and “Using the USB Port” in
Auxiliary Devices on page 7‑32.
®
Bluetooth
For vehicles with a Bluetooth
system, it allows users with a
Bluetooth‐enabled cell phone to
make and receive hands-free calls
using the vehicle’s audio system
,
and controls.
The Bluetooth‐enabled cell phone
must be paired with the Bluetooth
system before it can be used in the
vehicle. Not all phones will support
all functions. For more information,
visit www.gm.com/bluetooth.
For more information, see Bluetoothon page 7‑49.
®
Steering Wheel Controls
If available, some audio controls
can be adjusted at the steering
wheel.
w : Press to go to the next
favorite radio station, track on
a CD, or folder on an iPod
USB device.
®
or
c / x : Press to go to the
previous favorite radio station, track
on a CD, or folder on an iPod
USB device. Press to reject an
incoming call, or to end a call.
®
or
Page 26
Blackplate(20,1)
GMCSierraDenaliOwnerManual-2012
1-20In Brief
b / g : Press to silence the vehicle
speakers only. Press again to turn
the sound on. Press and hold longer
than two seconds to interact with
®
OnStar
if equipped.
+
−
SRCE: Press to switch between
the radio and CD, and for equipped
vehicles, the DVD, front auxiliary,
and rear auxiliary.
or Bluetooth systems,
e : Press to increase volume.
e : Press to decrease volume.
¨ : Press to seek the next radio
station, the next track or chapter
while sourced to the CD or DVD
slot, or to select tracks and folders
on an iPod or USB device.
For more information, see SteeringWheel Controls on page 5‑3.
Cruise Control
T : Press to turn the system on
or off. The indicator light is on when
cruise control is on and turns off
when cruise control is off.
+ RES : Press briefly to make the
vehicle resume to a previously set
speed, or press and hold to
accelerate.
SET − : Press to set the speed and
activate cruise control or make the
vehicle decelerate.
[ : Press to disengage cruise
control without erasing the set
speed from memory.
See Cruise Control on page 9‑49.
Navigation System
If the vehicle has a navigation
system, there is a separate
navigation system manual that
includes information on the radio,
audio players, and navigation
system.
The navigation system provides
detailed maps of most major
freeways and roads. After a
destination has been set, the
system provides turn-by-turn
instructions for reaching the
destination. In addition, the system
can help locate a variety of points of
interest (POIs), such as banks,
airports, restaurants, and more.
See the navigation system manual
for more information.
Page 27
Blackplate(21,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-21
Driver Information
Center (DIC)
The DIC display is located at the
bottom of the instrument panel
cluster. It shows the status of many
vehicle systems and enables
access to the personalization menu.
The DIC buttons are located on the
instrument panel, next to the
steering wheel.
3 : Press this button to display
the odometer, trip odometer, fuel
range, average economy, fuel used,
timer, and transmission temperature.
The compass and outside air
temperature will also be shown in
the display. The temperature will be
shown in °C or °F depending on the
units selected.
T : Press this button to display
the oil life, units, tire pressure
readings for vehicles with the Tire
Pressure Monitor System (TPMS),
trailer brake gain and output
information for vehicles with the
Integrated Trailer Brake Control
(ITBC) system, engine hours,
compass zone setting, and
compass recalibration.
U : Press this button to customize
the feature settings on your vehicle.
See Vehicle Personalization onpage 5‑45 for more information.
V : Press this button to set or reset
certain functions and to turn off or
acknowledge messages on the DIC.
Some vehicles do not have the
buttons shown, however some of
the menus can be viewed by using
the trip odometer reset stem.
For more information, see Driver
Information Center (DIC) on
page 5‑28.
Vehicle Customization
Some vehicle features can be
programmed by using the DIC
buttons next to the steering wheel.
These features include:
.
Language
.
Door Lock and Unlock Settings
.
RKE Lock and Unlock Feedback
.
Lighting
.
Chime Volume
.
Memory Features
See Vehicle Personalization onpage 5‑45.
Page 28
Blackplate(22,1)
GMCSierraDenaliOwnerManual-2012
1-22In Brief
Rear Vision
Camera (RVC)
If available, the RVC displays a view
of the area behind the vehicle when
the vehicle is shifted into
R (Reverse). This is displayed on
the inside rearview mirror or the
navigation screen, if equipped.
To clean the camera lens, located in
the bezel of the tailgate handle,
rinse it with water and wipe it with a
soft cloth.
For more information, see RearVision Camera (RVC) on page 9‑54.
Ultrasonic Parking Assist
If available, Ultrasonic Rear Parking
Assist (URPA) system uses sensors
on the rear bumper to assist with
parking and avoiding objects while
in R (Reverse). It operates at
speeds less than 8 km/h (5 mph).
URPA uses audible beeps to
provide distance and system
information.
Keep the sensors on the vehicle's
rear bumper clean to ensure proper
operation.
See Ultrasonic Parking Assist onpage 9‑52 for more information.
Power Outlets
Accessory power outlets can be
used to plug in electrical equipment,
such as a cell phone or MP3 player.
There are two accessory power
outlets on the instrument panel, one
inside the center floor console, and
one on the rear of the center floor
console.
To access the accessory power
outlet inside the center floor
console, press the button on the
side of the console door. See
Center Console Storage on
page 4‑2 for more information.
Remove the cover to access and
replace when not in use.
See Power Outlets on page 5‑10.
Universal Remote System
Vehicles with the Universal Remote
System will have these buttons
located in the headliner.
This system provides a way to
replace up to three remote control
transmitters used to activate
devices such as garage door
openers, security systems, and
home automation devices.
Read the instructions completely
before attempting to program the
transmitter. Because of the steps
involved, it may be helpful to have
another person assist with
programming the transmitter.
See Universal Remote System onpage 5‑53.
Page 29
Blackplate(23,1)
GMCSierraDenaliOwnerManual-2012
In Brief1-23
Sunroof
A. Open or Close
B. Vent
On vehicles with a sunroof, there
are two sunroof switches on the
overhead console above the
rearview mirror.
The sunroof only operates when the
ignition is in the ACC/ACCESSORY
or ON/RUN or the Retained
Accessory Power (RAP) is active.
See Retained Accessory Power(RAP) on page 9‑30 for more
information.
To open or close the sunroof, press
the open or close switch (A) to the
first detent position.
To express open or close the
sunroof, press the open or close
switch (A) to the second detent
position and release. To stop the
movement, press the switch again.
The sunroof has a comfort stop
feature which stops the sunroof from
opening to the full-open position.
From the comfort stop position,
press the open or close switch (A) a
second time to open the sunroof to
the full-open position.
To automatically vent or close the
sunroof, press the vent open or
close switch (B).
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
The sunroof also has a sunshade
which can be pulled forward to block
sun rays. The sunshade must be
opened and closed manually.
If an object is in the path of the
sunroof while it is closing, the
anti-pinch feature will detect the
object and stop the sunroof.
See Sunroof on page 2‑19.
Page 30
Blackplate(24,1)
GMCSierraDenaliOwnerManual-2012
1-24In Brief
Performance and
Maintenance
StabiliTrak®System
If equipped, the vehicle has a
traction control system that limits
wheel spin and the StabiliTrak
system that assists with directional
control of the vehicle in difficult
driving conditions. Both systems
turn on automatically every time the
vehicle is started.
.
To turn off traction control, press
and release
panel. The appropriate DIC
message displays. See Ride
Control System Messages on
page 5‑41.
.
To turn off both traction control
and StabiliTrak, press and hold
g until g illuminates and the
appropriate DIC message
displays. See Ride ControlSystem Messages on page 5‑41.
g on the instrument
.
Press and release g again to
turn on both systems.
For more information, see
StabiliTrak
®
System on page 9‑46.
Tire Pressure Monitor
This vehicle may have a Tire
Pressure Monitor System (TPMS).
The TPMS warning light alerts you
to a significant loss in pressure of
one of the vehicle's tires. If the
warning light comes on, stop as
soon as possible and inflate the
tires to the recommended pressure
shown on the Tire and Loading
Information label. See Vehicle LoadLimits on page 9‑16. The warning
light will remain on until the tire
pressure is corrected.
During cooler conditions, the low tire
pressure warning light may appear
when the vehicle is first started and
then turn off. This may be an early
indicator that the tire pressures are
getting low and the tires need to be
inflated to the proper pressure.
The TPMS does not replace normal
monthly tire maintenance. It is the
driver’s responsibility to maintain
correct tire pressures.
See Tire Pressure Monitor Systemon page 10‑58.
Engine Oil Life System
The engine oil life system calculates
engine oil life based on vehicle use
and, on most vehicles, displays a
DIC message when it is necessary
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change.
Page 31
Blackplate(25,1)
GMCSierraDenaliOwnerManual-2012
Resetting the Oil Life System
To reset the Engine Oil Life System
on most vehicles:
1. Display OIL LIFE REMAINING
on the DIC. If the vehicle does
not have DIC buttons, the
vehicle must be in P (Park) to
access this display.
2. Press and hold the SET/RESET
button on the DIC, or the trip
odometer reset stem if the
vehicle does not have DIC
buttons, for more than
five seconds. The oil life will
change to 100%.
On all vehicles, the Engine Oil Life
System can be reset as follows:
1. Turn the ignition to ON/RUN with
the engine off.
2. Fully press the accelerator pedal
slowly three times within
five seconds.
3. Display OIL LIFE REMAINING
on the DIC. If the display shows
100%, the system is reset.
See Engine Oil Life System onpage 10‑10.
Fuel E85 (85% Ethanol)
Vehicles that have a FlexFuel badge
and a yellow fuel cap can use either
unleaded gasoline or ethanol fuel
containing up to 85% ethanol (E85).
See Fuel E85 (85% Ethanol) onpage 9‑63. For all other vehicles,
use only the unleaded gasoline
described under RecommendedFuel on page 9‑61.
Driving for Better Fuel
Economy
Driving habits can affect fuel
mileage. Here are some driving tips
to get the best fuel economy
possible.
.
Avoid fast starts and accelerate
smoothly.
.
Brake gradually and avoid
abrupt stops.
In Brief1-25
.
Avoid idling the engine for long
periods of time.
.
When road and weather
conditions are appropriate, use
cruise control.
.
Always follow posted speed
limits or drive more slowly when
conditions require.
.
Keep vehicle tires properly
inflated.
.
Combine several trips into a
single trip.
.
Replace the vehicle's tires with
the same TPC Spec number
molded into the tire's sidewall
near the size.
.
Follow recommended scheduled
maintenance.
Page 32
Blackplate(26,1)
GMCSierraDenaliOwnerManual-2012
1-26In Brief
Roadside Assistance
Program
U.S.: 1-888-881-3302
TTY Users (U.S.): 1-888-889-2438
Canada: 1-800-268-6800
Mexico: 01-800-466-0801
As the owner of a new GMC, you
are automatically enrolled in the
Roadside Assistance program.
See Roadside Assistance Program
(U.S. and Canada) on page 13‑7 or
Roadside Assistance Program
(Mexico) on page 13‑9 for more
information.
Roadside Assistance and OnStar
(U.S. and Canada)
If you have an active OnStar
subscription, press the
and the current GPS location will be
sent to an OnStar advisor who will
assess your problem, contact
Roadside Assistance, and relay
your exact location to get the
help you need.
Online Owner Center
(U.S. and Canada)
The Online Owner Center is a
complimentary service that includes
online service reminders, vehicle
maintenance tips, online owner
manual, special privileges,
and more.
Sign up today at:
www.gmcownercenter.com (U.S.)
or www.gm.ca (Canada).
Q button
OnStar
If equipped, this vehicle has a
comprehensive, in-vehicle system
that can connect to a live Advisor
for Emergency, Security, Navigation,
Connection, and Diagnostic
Services. See OnStar Overview onpage 14‑1 for more information.
Leaving children in a vehicle with
the ignition key is dangerous for
many reasons. Children or others
could be badly injured or even
killed. They could operate the
power windows or other controls
or even make the vehicle move.
The windows will function with the
keys in the ignition and children
could be seriously injured or killed
if caught in the path of a closing
window. Do not leave the keys in
a vehicle with children.
The key is used for the ignition and
all door locks.
The key has a bar-coded key tag
that the dealer or qualified locksmith
can use to make new keys. Store
this information in a safe place, not
in the vehicle.
See your dealer if a replacement
key or additional key is needed.
Notice: If the keys get locked in
the vehicle, it may have to be
damaged to get them out. Always
carry a spare key.
If you are locked out of the vehicle,
call the Roadside Assistance
Center. See Roadside Assistance
Program (U.S. and Canada) on
page 13‑7 or Roadside Assistance
Program (Mexico) on page 13‑9.
With an active OnStar subscription,
an OnStar Advisor may remotely
unlock the vehicle. See OnStarOverview on page 14‑1.
Page 35
Blackplate(3,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-3
Remote Keyless Entry
(RKE) System
See Radio Frequency Statement on
page 13‑21 for information
regarding Part 15 of the Federal
Communications Commission (FCC)
rules and Industry Canada
Standards RSS-GEN/210/220/310.
If there is a decrease in the
RKE operating range:
.
Check the distance. The
transmitter may be too far from
the vehicle.
.
Check the location. Other
vehicles or objects may be
blocking the signal.
.
Check the transmitter's battery.
See “Battery Replacement” later
in this section.
.
If the transmitter is still not
working correctly, see your
dealer or a qualified technician
for service.
Remote Keyless Entry
(RKE) System Operation
The Remote Keyless Entry (RKE)
transmitter functions work up to
60 m (195 ft) away from the vehicle.
There are other conditions which
can affect the performance of the
transmitter. See Remote KeylessEntry (RKE) System on page 2‑3.
With Remote Start (without
Remote Start Similar)
/ (Remote Vehicle Start):
For vehicles with this feature,
press
/ to start the engine from
outside the vehicle using the RKE
transmitter. See Remote VehicleStart on page 2‑5 for additional
information.
Q (Lock): Press to lock all the
doors.
If enabled through the Driver
Information Center (DIC), the turn
signal lamps flash once to indicate
locking has occurred. If enabled
through the DIC, the horn chirps
Q is pressed again within
when
three seconds. See VehiclePersonalization on page 5‑45 for
additional information.
Pressing
theft‐deterrent system. See
Anti-theft Alarm System on
page 2‑11.
Q arms the content
Page 36
Blackplate(4,1)
GMCSierraDenaliOwnerManual-2012
2-4Keys, Doors, and Windows
K (Unlock): Press once to unlock
only the driver door. If
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.
If enabled through the DIC, the turn
signal lamps flash twice to indicate
unlocking has occurred. See VehiclePersonalization on page 5‑45.
If enabled through the DIC, the
exterior lights may turn on. See
“Approach Lighting” under Vehicle
Personalization on page 5‑45.
Pressing
disarms the content theft‐deterrent
system. See Anti-theft AlarmSystem on page 2‑11.
K on the RKE transmitter
K is pressed
L (Vehicle Locator/Panic
Alarm): Press and release to
locate the vehicle. The turn signal
lamps flash and the horn sounds
three times.
Press and hold
two seconds to activate the panic
alarm. The turn signal lamps flash
and the horn sounds repeatedly for
30 seconds. The alarm turns off
when the ignition is moved to ON/
RUN or
ignition must be in LOCK/OFF for
the panic alarm to work.
L is pressed again. The
L for more than
Programming Transmitters to
the Vehicle
Only RKE transmitters programmed
to this vehicle will work. If a
transmitter is lost or stolen, a
replacement can be purchased and
programmed through your dealer.
When the replacement transmitter is
programmed to this vehicle, all
remaining transmitters must also be
reprogrammed. Any lost or stolen
transmitters will no longer work
once the new transmitter is
programmed. Each vehicle can
have up to eight transmitters
programmed to it. See your dealer
for transmitter programming.
Page 37
Blackplate(5,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-5
Battery Replacement
Replace the battery if the REPLACE
BATTERY IN REMOTE KEY
message displays in the DIC.
Notice: When replacing the
battery, do not touch any of the
circuitry on the transmitter. Static
from your body could damage the
transmitter.
To replace the battery:
1. Separate the transmitter with a
flat, thin object, such as a flat
head screwdriver.
.
Carefully insert the tool into
the notch located along the
parting line of the
transmitter. Do not insert
the tool too far. Stop as
soon as resistance is felt.
.
Twist the tool until the
transmitter is separated.
2. Remove the old battery. Do not
use a metal object.
3. Insert the new battery, positive
side facing down. Replace with a
CR2032 or equivalent battery.
4. Snap the transmitter back
together.
Remote Vehicle Start
If available, this feature allows you
to start the engine from outside of
the vehicle. It may also start up the
vehicle's heating or air conditioning
systems and rear window defogger.
Normal operation of the system will
return after the key is turned to the
ON/RUN position.
If the vehicle has an automatic
climate control system, the climate
control system will default to a
heating or cooling mode depending
on the outside temperatures. If the
vehicle does not have an automatic
climate control system, the system
will turn on at the setting the vehicle
was set to when the vehicle was
last turned off.
Page 38
Blackplate(6,1)
GMCSierraDenaliOwnerManual-2012
2-6Keys, Doors, and Windows
During a remote start, if the vehicle
has an automatic climate control
system and heated seats, the
heated seats will turn on during
colder outside temperatures and will
shut off when the key is turned to
ON/RUN. If the vehicle does not
have an automatic climate control
system, during remote start,
manually turn the heated seats on
and off. See Heated and VentilatedFront Seats on page 3‑7 for
additional information.
Laws in some communities may
restrict the use of remote starters.
For example, some laws may
require a person using the remote
start to have the vehicle in view
when doing so. Check local
regulations for any requirements on
remote starting of vehicles.
Do not use the remote start
feature if the vehicle is low on fuel.
The vehicle may run out of fuel.
If the vehicle has the remote start
feature, the RKE transmitter
functions will have an increased
range of operation. However, the
range may be less while the vehicle
is running.
There are other conditions which
can affect the performance of the
transmitter. See Remote KeylessEntry (RKE) System on page 2‑3 for
additional information.
/ (Remote Start): This button will
be on the RKE transmitter if the
vehicle has remote start.
To start the vehicle using the remote
start feature:
1. Aim the RKE transmitter at the
vehicle.
2. Press and release
Q.
3. Immediately press and hold
until the turn signal lamps flash.
If you cannot see the vehicle's
lamps, press and hold
two to four seconds.
When the vehicle starts, the
parking lamps will turn on and
remain on while the vehicle is
running. The doors will be
locked and the climate control
system may come on.
The engine will continue to run
for 10 minutes. Repeat the steps
for a 10-minute time extension.
Remote start can be extended
only once.
After entering the vehicle during a
remote start, insert and turn the key
to ON/RUN to drive the vehicle.
/
/ for
Page 39
Blackplate(7,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-7
To cancel a remote start:
.
Aim the RKE transmitter at the
vehicle and press and hold
/
until the parking lamps turn off.
.
Turn on the hazard warning
flashers.
.
Turn the ignition on and then
back off.
The vehicle can be remote started
two separate times between driving
sequences. The engine will run for
10 minutes after each remote start.
Or, you can extend the engine run
time by another 10 minutes within
the first 10 minute remote start time
frame, and before the engine stops.
For example, if
Q and then / are
pressed again after the vehicle has
been running for 5 minutes,
10 minutes are added, allowing the
engine to run for 15 minutes.
The additional 10 minutes are
considered a second remote
vehicle start.
Once two remote starts, or a single
remote start with one time extension
has been done, the vehicle must be
started with the key. After the key is
removed from the ignition, the
vehicle can be remote started again.
The vehicle cannot be remote
started if the key is in the ignition,
the hood is not closed, or if there is
an emission control system
malfunction and the check engine
light is on.
Also, the engine will turn off during a
remote vehicle start if the coolant
temperature gets too high or if the
oil pressure gets low.
Remote Start Ready
If the vehicle does not have the
remote vehicle start feature, it may
have the remote start ready feature.
This feature allows your dealer to
add the manufacturer's remote
vehicle start feature.
See your dealer to add the
manufacturer's remote vehicle start
feature to the vehicle.
Page 40
Blackplate(8,1)
GMCSierraDenaliOwnerManual-2012
2-8Keys, Doors, and Windows
Door Locks
WARNING
{
Unlocked doors can be
dangerous.
.
Passengers, especially
children, can easily open the
doors and fall out of a moving
vehicle. When a door is
locked, the handle will not
open it. The chance of being
thrown out of the vehicle in a
crash is increased if the
doors are not locked. So, all
passengers should wear
safety belts properly and the
doors should be locked
whenever the vehicle is
driven.
(Continued)
WARNING (Continued)
.
Young children who get into
unlocked vehicles may be
unable to get out. A child can
be overcome by extreme heat
and can suffer permanent
injuries or even death from
heat stroke. Always lock the
vehicle whenever leaving it.
.
Outsiders can easily enter
through an unlocked door
when you slow down or stop
the vehicle. Locking the doors
can help prevent this from
happening.
There are several ways to lock and
unlock the vehicle.
From outside, use the Remote
Keyless Entry (RKE) transmitter or
the key in the driver door.
From inside, use the power door
locks or manual door locks. To lock
or unlock the door with the manual
locks, push down or pull up on the
manual lock knob.
Power Door Locks
With power door locks, the switches
on the front doors can be used to
lock and unlock the vehicle.
If available, the switches are on the
front doors.
K (Unlock): Press to unlock the
doors.
Q (Lock): Press to lock the doors.
Delayed Locking
The vehicle may have the delayed
locking feature. When locking the
doors with the power lock switch
and a door is open, the doors will
lock five seconds after the last door
is closed. You will hear three chimes
to signal that the delayed locking
feature is in use.
Page 41
Blackplate(9,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-9
Pressing the power lock switch
twice will override the delayed
locking feature and immediately lock
all the doors.
This feature will not operate if the
key is in the ignition.
This feature can be programmed
using the Driver Information
Center (DIC). See “Delay Door
Lock” under Vehicle Personalizationon page 5‑45.
Automatic Door Locks
The vehicle may have an automatic
lock/unlock feature. This feature can
be programmed using the Driver
Information Center (DIC). See
Vehicle Personalization on
page 5‑45 for more information on
DIC programming.
Lockout Protection
If the driver side power door lock
switch is pressed when the driver
door is open and the key is in the
ignition, all of the doors will lock and
then the driver door will unlock.
If the passenger side power door
lock switch is pressed when the
front passenger door is open and
the key is in the ignition, all of the
doors will lock and then the front
passenger door will unlock.
Safety Locks
The vehicle has rear door security
locks to prevent passengers from
opening the rear doors from the
inside.
Open the rear doors to access the
security locks on the inside edge of
each door.
To set the locks, insert a key into
the slot and turn it to the horizontal
position. The door can only be
opened from the outside with the
door unlocked. To return the door to
normal operation, turn the slot to the
vertical position.
Page 42
Blackplate(10,1)
GMCSierraDenaliOwnerManual-2012
2-10Keys, Doors, and Windows
Doors
Tailgate
WARNING
{
It is extremely dangerous to ride
on the tailgate, even when the
vehicle is operated at low speeds.
People riding on the tailgate can
easily lose their balance and
fall in response to vehicle
maneuvers. Falling from a moving
vehicle may result in serious
injuries or death. Do not allow
people to ride on the tailgate.
Be sure everyone in your vehicle
is in a seat and using a safety
belt properly.
On vehicles with a lock on the
tailgate, use the key to lock or
unlock the tailgate.
Open the tailgate by lifting up on
its handle while pulling the
tailgate down.
To shut the tailgate, firmly push it
upward until it latches.
After closing the tailgate, pull it back
to be sure it latches securely.
Tailgate Removal
The tailgate can be removed to
allow for different loading situations.
Assistance may be needed with the
removal to avoid damage to the
vehicle.
On vehicles with a Rear Vision
Camera, it must be disconnected
before removing the tailgate. See
Rear Vision Camera (RVC) on
page 9‑54 for more information.
To remove the tailgate:
1. Raise the tailgate slightly, pull
out and hold the cable retaining
clip (A). Push the cable (C) up
and off of the bolt (B). Repeat on
the other side.
Page 43
Blackplate(11,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-11
2. With the tailgate about halfway
open, lift the right edge of the
tailgate from the lower pivot.
On vehicles with the tailgate
assist feature, raise the tailgate
nearly all the way to the closed
position prior to removing the
left edge.
3. Move the tailgate to the right to
release the left edge.
Reverse this procedure to reinstall
the tailgate. Make sure the tailgate
is secure.
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not
make it impossible to steal.
Anti-theft Alarm System
This vehicle may have a content
theft-deterrent alarm system.
This is the security light.
To arm the theft-deterrent system:
1. Open the door.
2. Lock the door with the Remote
Keyless Entry (RKE) transmitter.
The security light should flash.
If the delayed locking feature is
active, the alarm will not be
activated until all doors are
closed and the security light
goes off.
3. Close all doors. The security
light will stop flashing and go off
after approximately 30 seconds.
The system is armed when the
security light goes off.
If a locked driver door is opened
without using the RKE transmitter,
a 10 second pre-alarm will occur.
The horn will chirp and the lights will
flash. If the key is not placed in the
ignition and turned to START or the
door is not unlocked by pressing
the unlock button on the RKE
transmitter during the 10 second
pre-alarm, the alarm will go off. The
vehicle's headlamps will flash and
the horn will sound for about
30 seconds, then will turn off to
save the battery power.
The theft-deterrent system will not
activate if the doors are locked with
the key or the manual door lock.
Page 44
Blackplate(12,1)
GMCSierraDenaliOwnerManual-2012
2-12Keys, Doors, and Windows
It activates only if you use the
power door lock switch or the RKE
transmitter. The vehicle can be
started with the correct key if the
alarm is set off.
To avoid setting off the alarm by
accident:
.
If you do not want to activate
the theft-deterrent system, the
vehicle should be locked with
the door key after the doors are
closed.
.
Always unlock a door with the
RKE transmitter.
If the alarm is set off, press unlock
on the RKE transmitter or place the
key in the ignition and turn it to
START.
Testing the Alarm
To test the alarm:
1. Lower the driver window and
open the driver door.
2. Press lock on the RKE
transmitter.
3. Close the door and wait for the
security light to go out.
4. Reach in through the window,
unlock the door with the manual
door lock, and open the door.
This should set off the alarm.
If the alarm does not sound when it
should but the headlamps flash,
check to see if the horn works. The
horn fuse may be blown. To replace
the fuse, see Fuses and CircuitBreakers on page 10‑41.
If the alarm does not sound or the
headlamps do not flash, see your
dealer for service.
Immobilizer
See Radio Frequency Statement on
page 13‑21 for information
regarding Part 15 of the Federal
Communications Commission (FCC)
rules and Industry Canada
Standards RSS-GEN/210/220/310.
Immobilizer Operation
This vehicle has PASS-Key®III+
(Personalized Automotive Security
System) theft-deterrent system.
PASS-Key III+ is a passive
theft-deterrent system.
The system is automatically armed
when the key is removed from the
ignition.
The system is automatically
disarmed when the key is turned to
ON/RUN, ACC/ACCESSORY,
or START from the LOCK/OFF
position.
You do not have to manually arm or
disarm the system.
The security light will come on if
there is a problem with arming or
disarming the theft-deterrent
system.
When the PASS-Key III+ system
senses that someone is using the
wrong key, it prevents the vehicle
from starting.
Page 45
Blackplate(13,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-13
Anyone using a trial-and-error
method to start the vehicle will be
discouraged because of the high
number of electrical key codes.
If the engine does not start and the
security light on the instrument
panel cluster comes on when trying
to start the vehicle, there may be a
problem with the theft-deterrent
system. Turn the ignition off and
try again.
If the engine still does not start, and
the key appears to be undamaged,
try another ignition key. At this time,
you may also want to check the
fuse. See Fuses and CircuitBreakers on page 10‑41. If the
engine still does not start with the
other key, the vehicle needs service.
If the vehicle does start, the first key
may be faulty. See your dealer who
can service the PASS-Key III+ to
have a new key made.
It is possible for the PASS-Key III+
decoder to learn the transponder
value of a new or replacement key.
Up to 10 keys may be programmed
for the vehicle. The following
procedure is for programming
additional keys only. If all the
currently programmed keys are lost
or do not operate, you must see
your dealer or a locksmith who can
service PASS-Key III+ to have keys
made and programmed to the
system.
See your dealer or a locksmith who
can service PASS-Key III+ to get a
new key blank cut exactly as the
ignition key that operates the
system.
To program the new additional key:
1. Verify that the new key has a
stamped on it.
2. Insert the original, already
programmed key in the ignition
and start the engine. If the
engine will not start, see your
dealer for service.
3. After the engine has started, turn
the key to LOCK/OFF, and
remove the key.
1
4. Insert the new key to be
programmed and turn it to the
ON/RUN position within
five seconds of turning the
ignition to the LOCK/OFF
position in Step 3.
The security light will turn off
once the key has been
programmed.
5. Repeat Steps 1 through 4 if
additional keys are to be
programmed.
If you lose or damage your
PASS-Key III+ key, see your dealer
or a locksmith who can service
PASS-Key III+ to have a new
key made.
Do not leave the key or device
that disarms or deactivates the
theft-deterrent system in the vehicle.
Page 46
Blackplate(14,1)
GMCSierraDenaliOwnerManual-2012
2-14Keys, Doors, and Windows
Exterior Mirrors
Convex Mirrors
WARNING
{
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Check the inside mirror or
glance over your shoulder before
changing lanes.
The passenger side mirror is convex
shaped. A convex mirror's surface is
curved so more can be seen from
the driver seat.
Power Mirrors
Vehicles with outside power mirrors
have controls located on the
driver door.
To adjust each mirror:
1. Press (A) or (B) to select the
driver or passenger side mirror.
2. Press the arrows on the control
pad to move the mirror up,
down, right, or left.
3. Adjust the outside mirror so that
the side of the vehicle and the
area behind are seen.
4. Press either (A) or (B) again to
deselect the mirror.
Folding Mirrors
Vehicles with outside power
foldaway mirrors have controls on
the driver door.
Power Foldaway
1. Press (A) to fold the mirrors out
to the driving position.
2. Press (B) to fold the mirrors in to
the folded position.
Page 47
Blackplate(15,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-15
Resetting the Power Foldaway
Mirrors
Reset the power foldaway mirrors if:
.
The mirrors are accidentally
obstructed while folding.
.
They are accidentally manually
folded/unfolded.
.
The mirrors will not stay in the
unfolded position.
.
The mirrors vibrate at normal
driving speeds.
Fold and unfold the mirrors one time
using the mirror controls to reset
them to their normal position.
A popping noise may be heard
during the resetting of the power
foldaway mirrors. This sound is
normal after a manual folding
operation.
Manual Foldaway
Manually fold the mirrors inward to
prevent damage when going
through an automatic car wash.
To fold, pull the mirror toward the
vehicle. Push the mirror outward, to
return to its original position.
Automatic Dimming
If equipped with an automatic
dimming mirror, the driver outside
mirror adjusts for the glare of the
headlamps behind you. See
Automatic Dimming Rearview Mirror
on page 2‑16.
Turn Signal Indicator
The vehicle may also have a turn
signal indicator on the mirror. An
arrow on the mirror flashes in the
direction of the turn or lane change.
Heated Mirrors
For vehicles with heated mirrors:
1 (Rear Window Defogger):
Press to heat the mirrors. If the
vehicle has a towing mirror, only the
upper glass of the mirror is heated.
The lower convex part of the towing
mirror is not heated.
See “Rear Window Defogger” under
Dual Automatic Climate Control
System on page 8‑1.
Park Tilt Mirrors
If the vehicle has the memory
package, the passenger and/or
driver mirror tilts to a preselected
position when the vehicle is in
R (Reverse). This feature lets the
driver view the curb when parallel
parking. The mirror(s) return to the
original position when the vehicle is
shifted out of R (Reverse), or the
ignition is turned off or to
OFF/LOCK.
Turn this feature on or off through
the Driver Information Center (DIC).
See Vehicle Personalization onpage 5‑45 for more information.
Page 48
Blackplate(16,1)
GMCSierraDenaliOwnerManual-2012
2-16Keys, Doors, and Windows
Interior Mirrors
Manual Rearview Mirror
Hold the mirror in the center to
move it for a clearer view of behind
your vehicle. Adjust the mirror to
avoid glare from the headlamps
behind you. Push the tab at the
bottom of the mirror forward for
daytime use and pull it for
nighttime use.
Automatic Dimming
Rearview Mirror
The vehicle may have an automatic
dimming inside rearview mirror.
Automatic dimming reduces the
glare from the headlamps of the
vehicle behind you. The dimming
feature comes on and the indicator
light illuminates each time the
ignition is turned to start.
O (On/Off): Press to turn the
dimming feature on or off.
The vehicle may also have a Rear
Vision Camera (RVC). See Rear
Vision Camera (RVC) on page 9‑54
for more information.
If the vehicle has a RVC, the
O button for turning the dimming
feature on or off will not be
available.
Vehicles with OnStar have three
additional control buttons for the
OnStar system. See your dealer for
more information about OnStar and
how to subscribe to it. See OnStarOverview on page 14‑1.
Cleaning the Mirror
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Windows
WARNING
{
Leaving children, helpless adults,
or pets in a vehicle with the
windows closed is dangerous.
They can be overcome by the
extreme heat and suffer
permanent injuries or even death
from heat stroke. Never leave a
child, a helpless adult, or a pet
alone in a vehicle, especially with
the windows closed in warm or
hot weather.
Page 49
Blackplate(17,1)
GMCSierraDenaliOwnerManual-2012
The vehicle aerodynamics are
designed to improve fuel economy
performance. This may result in a
pulsing sound when either rear
window is down and the front
windows are up. To reduce the
sound, open either a front window
or the sunroof (if equipped).
Keys, Doors, and Windows2-17
Power Windows
WARNING
{
Leaving children in a vehicle with
the keys is dangerous for many
reasons. Children or others could
be badly injured or even killed.
They could operate the power
windows or other controls or even
make the vehicle move. The
windows will function and they
could be seriously injured or killed
if caught in the path of a closing
window. Do not leave keys in a
vehicle with children.
When there are children in the
rear seat use the window lockout
button to prevent unintentional
operation of the windows.
Window switches are located on
each door.
The driver door has a switch for the
passenger and rear windows as
well. The power windows will work
when the ignition has been turned to
ON/RUN or ACC/ACCESSORY,
or when Retained Accessory
Power (RAP) is active. See
Retained Accessory Power (RAP)
on page 9‑30.
Push the switch down to lower the
window, and pull up the front of the
switch to raise the window.
Page 50
Blackplate(18,1)
GMCSierraDenaliOwnerManual-2012
2-18Keys, Doors, and Windows
Express-down Windows
The express-down feature allow the
driver and front passenger windows
to be lowered without holding the
switch. Push the switch down to the
second detent, then release, to
activate the express-down mode.
The express-down mode can be
canceled at any time by pulling up
on the front of the switch. To open
the window partway, push the switch
down to the first detent until the
window is at the desired position.
Window Lockout
o (Window Lockout): The driver
door power window switch has a
lockout feature. This feature
prevents the rear windows from
operating, except from the driver
position. Press the switch to engage
or disengage the lockout feature.
An indicator light on the switch will
come on when the lockout feature is
engaged, and will go off when
disengaged.
Rear Windows
If your vehicle has this feature,
squeeze the latch in the center of
the window and slide the glass
to open.
When you close the window, be
sure the latch is engaged.
The sliding rear window does not
have rear defogger.
Power Sliding Rear Window
On vehicles with a power sliding
rear window, the switch is located in
the overhead console.
The power sliding rear window
works when the ignition has been
turned to ACC/ACCESSORY,
ON/RUN, or when Retained
Accessory Power (RAP) is active.
See Retained Accessory Power(RAP) on page 9‑30 for more
information.
.
Push to open the window.
.
Pull to close the window.
The power sliding rear window
cannot be operated manually.
Page 51
Blackplate(19,1)
GMCSierraDenaliOwnerManual-2012
Keys, Doors, and Windows2-19
Sun Visors
Pull the sun visor down to block
glare. Detach the sun visor from the
center mount to pivot to the side
window, or to extend along the rod,
if available.
Roof
Sunroof
A. Open or Close
B. Vent
On vehicles with a sunroof, there
are two sunroof switches located in
the overhead console above the
rearview mirror.
The sunroof only operates when the
ignition is in the ACC/ACCESSORY
or ON/RUN or the Retained
Accessory Power (RAP) is active.
See Retained Accessory Power(RAP) on page 9‑30 for more
information.
To open or close the sunroof, press
the open or close switch (A) to the
first detent position.
To express open or close the
sunroof, press the open or close
switch (A) to the second detent
position and release. To stop the
movement, press the switch again.
The sunroof has a comfort stop
feature which stops the sunroof from
opening to the full-open position.
From the comfort stop position,
press the open or close switch (A) a
second time to open the sunroof to
the full-open position.
To automatically vent or close the
sunroof, press the vent open or
close switch (B).
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
Page 52
Blackplate(20,1)
GMCSierraDenaliOwnerManual-2012
2-20Keys, Doors, and Windows
The sunroof also has a sunshade
which can be pulled forward to block
sun rays. The sunshade must be
opened and closed manually.
If an object is in the path of the
sunroof while it is closing, the
anti-pinch feature will detect the
object and stop the sunroof.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
The front seats have adjustable
head restraints in the outboard
seating positions.
WARNING
{
With head restraints that are not
installed and adjusted properly,
there is a greater chance that
occupants will suffer a neck/
spinal injury in a crash. Do not
drive until the head restraints for
all occupants are installed and
adjusted properly.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.
The height of the head restraint can
be adjusted. Pull the head restraint
up to raise it. Try to move the head
restraint to make sure that it is
locked in place.
To lower the head restraint, press
the button, located on the top of the
seatback, and push the restraint
down. Try to move the head
restraint after the button is released
to make sure that it is locked in
place.
The front seat outboard head
restraints are not designed to be
removed.
Page 55
Blackplate(3,1)
GMCSierraDenaliOwnerManual-2012
Rear Seats
The rear seat has adjustable
headrests in the outboard seating
positions.
The height of the headrest can be
adjusted. Pull the headrest up to
raise it. To lower the headrest, push
down on the headrest.
Rear outboard headrests are not
designed to be removed.
Front Seats
Power Seat Adjustment
To adjust the seat:
.
Move the seat forward or
rearward by sliding the control
forward or rearward.
.
Raise or lower the front or rear
part of the seat cushion by
moving the front or rear of the
control up or down.
Seats and Restraints3-3
.
Raise or lower the entire seat by
moving the entire control up
or down.
To adjust the seatback, see
Reclining Seatbacks on page 3‑4.
Lumbar Adjustment
To adjust the lumbar support:
.
Press and hold the front or rear
of the control to increase or
decrease lumbar support.
.
Press and hold the top or bottom
of the control to raise or lower
the height of the lumbar support.
Page 56
Blackplate(4,1)
GMCSierraDenaliOwnerManual-2012
3-4Seats and Restraints
Reclining Seatbacks
Power Reclining Seatbacks
WARNING
{
You can lose control of the
vehicle if you try to adjust the
seat while the vehicle is moving.
The sudden movement could
startle and confuse you, or make
you push a pedal when you do
not want to. Adjust the driver seat
only when the vehicle is not
moving.
To adjust the seatback:
.
Tilt the top of the control
rearward to recline.
.
Tilt the top of the control forward
to raise.
WARNING
{
Sitting in a reclined position when
the vehicle is in motion can be
dangerous. Even when buckled
up, the safety belts cannot do
their job when reclined like this.
The shoulder belt cannot do its
job because it will not be against
your body. Instead, it will be in
front of you. In a crash, you could
go into it, receiving neck or other
injuries.
The lap belt cannot do its job
either. In a crash, the belt could
go up over your abdomen. The
belt forces would be there, not at
your pelvic bones. This could
cause serious internal injuries.
For proper protection when the
vehicle is in motion, have the
seatback upright. Then sit well
back in the seat and wear the
safety belt properly.
Page 57
Blackplate(5,1)
GMCSierraDenaliOwnerManual-2012
Seats and Restraints3-5
Do not have a seatback reclined if
the vehicle is moving.
Memory Seats
The controls on the driver door are
used to program and recall memory
settings for the driver seat, outside
mirrors, and the adjustable throttle
and brake pedal positions.
Storing Memory Positions
To save into memory:
1. Adjust the driver seat, seatback
recliner, both outside mirrors,
and the throttle and brake
pedals.
See Power Mirrors on page 2‑14
and Adjustable Throttle andBrake Pedal on page 9‑26 for
more information.
Not all mirrors and adjustable
throttles and brake pedals will
have the ability to save and
recall their positions.
2. Press and hold “1” until
two beeps sound.
3. Repeat for a second driver
position using “2.”
To recall, press and release “1” or
“2.” The vehicle must be in P (Park).
A single beep will sound. The seat,
outside mirrors, and adjustable
throttle and brake pedals will move
to the position previously stored for
the identified driver.
Page 58
Blackplate(6,1)
GMCSierraDenaliOwnerManual-2012
3-6Seats and Restraints
Memory Remote Recall
This feature can recall the driver
seat, outside mirrors, and pedals to
stored positions when entering the
vehicle.
To activate, unlock the driver
door with the Remote Keyless
Entry (RKE) transmitter. The driver
seat, outside mirrors, and adjustable
pedals will move to the memory
position associated with the
transmitter used to unlock the
vehicle.
This feature can be turned on or off
using the vehicle personalization
menu. See Vehicle Personalizationon page 5‑45 for more information.
To stop recall movement, press one
of the power seat controls, memory
buttons, or power mirror buttons,
or the adjustable pedal switch.
If something has blocked the driver
seat and/or the adjustable pedals
while recalling a memory position,
the recall may stop. Remove the
obstruction; then press and hold the
appropriate manual control for the
memory item that is not recalling for
two seconds. Try recalling the
memory position again by pressing
the appropriate memory button.
If the memory position is still not
recalling, see your dealer for
service.
Easy Exit Driver Seat
This feature can move the seat
rearward to allow extra room to
exit the vehicle.
B (Easy Exit Driver Seat): Press
to recall the easy exit seat position.
The vehicle must be in P (Park).
If the easy exit seat feature is
programmed on in the vehicle
personalization menu, automatic
seat movement occurs when the
ignition key is removed.
A single beep sounds. The driver
seat moves back approximately
8 cm (3 in). To move the seat back
farther, press
seat is all the way back.
If something has blocked the driver
seat while recalling the exit position,
the recall may stop. Remove the
obstruction; then press and hold the
power seat control rearward for
two seconds. Try recalling the exit
position again. If the exit position is
still not recalling, see your dealer for
service.
See Vehicle Personalization onpage 5‑45 for more information.
B again until the
Page 59
Blackplate(7,1)
GMCSierraDenaliOwnerManual-2012
Seats and Restraints3-7
Heated and Ventilated
Front Seats
WARNING
{
If you cannot feel temperature
change or pain to the skin, the
seat heater may cause burns
even at low temperatures. To
reduce the risk of burns, people
with such a condition should use
care when using the seat heater,
especially for long periods of
time. Do not place anything on
the seat that insulates against
heat, such as a blanket, cushion,
cover, or similar item. This may
cause the seat heater to
overheat. An overheated seat
heater may cause a burn or may
damage the seat.
The buttons are on the front doors.
H (Cooled Seat): Press to cool
the seat.
I (Heated Seatback): Press to
heat the seatback only.
J (Heated Seat and Seatback):
Press to heat the seat and
seatback.
Press the button once for the
highest setting. With each press of
the button, the seat will change to
the next lower setting, and then to
the off setting. The lights indicate
three for the highest setting and
one for the lowest.
The passenger seat may take
longer to heat up.
The heated and cooled seats are
canceled when the ignition is
turned off. To use this feature after
restarting the vehicle, press the
desired button again.
Page 60
Blackplate(8,1)
GMCSierraDenaliOwnerManual-2012
3-8Seats and Restraints
Remote Start Heated Seats
When it is cold outside, the heated
seats may turn on automatically
during a remote vehicle start. The
heated seats will be canceled when
the ignition is turned on. Press the
desired button to use the heated
seats after the vehicle is started.
The lights on the heated seat
buttons do not turn on during a
remote start.
The temperature performance of an
unoccupied seat may be reduced.
This is normal.
See Remote Vehicle Start onpage 2‑5 for more information.
Rear Seats
Rear Seats (Split Bench)
Folding Rear 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.
WARNING
{
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.
Page 61
Blackplate(9,1)
GMCSierraDenaliOwnerManual-2012
Seats and Restraints3-9
Safety Belts
This section of the manual
describes how to use safety belts
properly. It also describes some
things not to do with safety belts.
WARNING
{
Do not let anyone ride where a
safety belt cannot be worn
properly. In a crash, if you or your
passenger(s) are not wearing
safety belts, injuries can be much
worse than if you are wearing
safety belts. You can be seriously
injured or killed by hitting things
inside the vehicle harder or by
being ejected from the vehicle.
(Continued)
WARNING (Continued)
In addition, anyone who is not
buckled up can strike other
passengers in the vehicle.
It is extremely dangerous to ride
in a cargo area, inside or outside
of a vehicle. In a collision,
passengers riding in these areas
are more likely to be seriously
injured or killed. Do not allow
passengers to ride in any area of
the vehicle that is not equipped
with seats and safety belts.
(Continued)
WARNING (Continued)
Always wear a safety belt, and
check that all passenger(s) are
restrained properly too.
This vehicle has indicators as a
reminder to buckle the safety belts.
See Safety Belt Reminders onpage 5‑17 for additional information.
Page 62
Blackplate(10,1)
GMCSierraDenaliOwnerManual-2012
3-10Seats and Restraints
Why Safety Belts Work
When riding in a vehicle, you
travel as fast as the vehicle does.
If the vehicle stops suddenly, you
keep going until something stops
you. It could be the windshield, the
instrument panel, or the safety belts!
When you wear a safety belt, you
and the vehicle slow down together.
There is more time to stop because
you stop over a longer distance and,
when worn properly, your strongest
bones take the forces from the
safety belts. That is why wearing
safety belts makes such good
sense.
Questions and Answers About
Safety Belts
Q: Will I be trapped in the vehicle
after a crash if I am wearing a
safety belt?
A: You could be — whether you are
wearing a safety belt or not.
Your chance of being conscious
during and after a crash, so you
can unbuckle and get out, is
much greater if you are belted.
Q: If my vehicle has airbags, why
should I have to wear safety
belts?
A: Airbags are supplemental
systems only; so they work with
safety belts — not instead of
them. Whether or not an airbag
is provided, all occupants still
have to buckle up to get the
most protection.
Also, in nearly all states and in
all Canadian provinces, the law
requires wearing safety belts.
Page 63
Blackplate(11,1)
GMCSierraDenaliOwnerManual-2012
How to Wear Safety Belts
Properly
This section is only for people of
adult size.
There are special things to know
about safety belts and children. And
there are different rules for smaller
children and infants. If a child will be
riding in the vehicle, see Older
Children on page 3‑35 or Infants
and Young Children on page 3‑37.
Follow those rules for everyone's
protection.
It is very important for all occupants
to buckle up. Statistics show that
unbelted people are hurt more often
in crashes than those who are
wearing safety belts.
There are important things to know
about wearing a safety belt properly.
.
Sit up straight and always keep
your feet on the floor in front
of you.
.
Always use the correct buckle
for your seating position.
.
Wear the lap part of the belt low
and snug on the hips, just
touching the thighs. In a crash,
this applies force to the strong
pelvic bones and you would be
less likely to slide under the lap
belt. If you slid under it, the belt
would apply force on your
abdomen. This could cause
serious or even fatal injuries.
Seats and Restraints3-11
.
Wear the shoulder belt over the
shoulder and across the chest.
These parts of the body are best
able to take belt restraining
forces. The shoulder belt locks if
there is a sudden stop or crash.
WARNING
{
You can be seriously injured,
or even killed, by not wearing
your safety belt properly.
.
Never allow the lap or
shoulder belt to become
loose or twisted.
.
Never wear the shoulder belt
under both arms or behind
your back.
.
Never route the lap or
shoulder belt over an
armrest.
Page 64
Blackplate(12,1)
GMCSierraDenaliOwnerManual-2012
3-12Seats and Restraints
Lap-Shoulder Belt
All seating positions in the vehicle
have a lap-shoulder belt.
The following instructions explain
how to wear a lap-shoulder belt
properly.
1. Adjust the seat, if the seat is
adjustable, so you can sit up
straight. To see how, see “Seats”
in the Index.
2. 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.
If the shoulder portion of a
passenger belt is pulled out all
the way, the child restraint
locking feature may be engaged.
If this happens, let the belt go
back all the way and start again.
Engaging the child restraint
locking feature may affect the
passenger sensing system,
if equipped. See Passenger
Sensing System on page 3‑27
for more information.
If the belt stops before it reaches
the buckle, for the rear center
seating position, tilt the latch
plate and keep pulling the safety
belt until it can be buckled.
3. Push the latch plate into the
buckle until it clicks. If you find
that the latch plate will not go
fully into the buckle, see if you
are using the correct buckle.
Pull up on the latch plate to
make sure it is secure. If the belt
is not long enough, see SafetyBelt Extender on page 3‑18.
Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary.
Page 65
Blackplate(13,1)
GMCSierraDenaliOwnerManual-2012
4. If equipped with a shoulder belt
height adjuster, move it to the
height that is right for you. See
“Shoulder Belt Height Adjuster”
in this section for instructions on
use and important safety
information.
Seats and Restraints3-13
5. To make the lap part tight, pull
up on the shoulder belt.
It may be necessary to pull
stitching on the safety belt
through the latch plate to fully
tighten the lap belt on smaller
occupants.
To unlatch the belt, push the button
on the buckle. The belt should
return to its stowed position.
Before a door is closed, be sure the
safety belt is out of the way. If a
door is slammed against a safety
belt, damage can occur to both the
belt and the vehicle.
Page 66
Blackplate(14,1)
GMCSierraDenaliOwnerManual-2012
3-14Seats and Restraints
Shoulder Belt Height Adjuster
The vehicle has a shoulder belt
height adjuster for the driver and
right front passenger positions.
Adjust the height so the shoulder
portion of the belt is on the shoulder
and not falling off of it. The belt
should be close to, but not
contacting, the neck. Improper
shoulder belt height adjustment
could reduce the effectiveness of
the safety belt in a crash. See How
to Wear Safety Belts Properly on
page 3‑11.
Squeeze the buttons (A) on the
sides of the height adjuster and
move the height adjuster to the
desired position.
The adjuster can be moved up just
by pushing up on the shoulder belt
guide.
After the adjuster is set to the
desired position, try to move it down
without squeezing the buttons to
make sure it has locked into
position.
Safety Belt Pretensioners
This vehicle has safety belt
pretensioners for front outboard
occupants. Although the safety belt
pretensioners cannot be seen, they
are part of the safety belt assembly.
They can help tighten the safety
belts during the early stages of a
moderate to severe frontal, near
frontal, or rear crash if the threshold
conditions for pretensioner
activation are met. And, if the
vehicle has side impact airbags,
safety belt pretensioners can help
tighten the safety belts in a side
crash or a rollover event.
Pretensioners work only once. If the
pretensioners activate in a crash,
they will need to be replaced, and
probably other new parts for the
vehicle's safety belt system. See
Replacing Safety Belt System Parts
after a Crash on page 3‑19.
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Rear Safety Belt Comfort
Guides
This vehicle may have rear shoulder
belt comfort guides. If not, they are
available through your dealer. The
guides may provide added safety
belt comfort for older children who
have outgrown booster seats and
for some adults. When installed and
properly adjusted, the comfort guide
positions the belt away from the
neck and head.
To install a comfort guide to the
safety belt:
1. Remove the guide from its
storage pocket on the side of
the seat.
2. Place the guide over the belt,
and insert the two edges of the
belt into the slots of the guide.
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3-16Seats and Restraints
3. Be sure that the belt is not
twisted and it lies flat. The
elastic cord must be under the
belt and the guide on top.
WARNING
{
A safety belt that is not properly
worn may not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured.
(Continued)
WARNING (Continued)
The shoulder belt should go over
the shoulder and across the
chest. These parts of the body
are best able to take belt
restraining forces.
4. Buckle, position, and release the
safety belt as described
previously in this section. Make
sure the shoulder portion of the
belt is on the shoulder and not
falling off of it. The belt should
be close to, but not contacting,
the neck.
To remove and store the comfort
guide, squeeze the belt edges
together so that the safety belt can
be removed from the guide. Slide
the guide into its storage pocket on
the side of the seat.
Page 69
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Seats and Restraints3-17
Safety Belt Use During
Pregnancy
Safety belts work for everyone,
including pregnant women. Like all
occupants, they are more likely to
be seriously injured if they do not
wear safety belts.
A pregnant woman should wear a
lap-shoulder belt, and the lap
portion should be worn as low as
possible, below the rounding,
throughout the pregnancy.
The best way to protect the fetus is
to protect the mother. When a safety
belt is worn properly, it is more likely
that the fetus will not be hurt in a
crash. For pregnant women, as for
anyone, the key to making safety
belts effective is wearing them
properly.
Lap Belt
This part is only for the lap belt.
To learn how to wear a lap-shoulder
belt, see Lap-Shoulder Belt onpage 3‑12.
The vehicle may have a center
seating position. When you sit in the
center front seating position, you
have a lap safety belt, which has no
retractor.
To make the belt longer, tilt the latch
plate and pull it along the belt.
Buckle, position and release it the
same way as the lap part of a
lap-shoulder belt.
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To make the belt shorter, pull its free
end as shown until the belt is snug.
If the belt is not long enough, see
Safety Belt Extender on page 3‑18.
Make sure the release button on the
buckle is positioned so you would
be able to unbuckle the safety belt
quickly if necessary.
If you find that the latch plate will
not go fully into the buckle, see if
you are using the correct buckle. Be
sure that the latch plate clicks when
inserted into the buckle.
Safety Belt Extender
If the vehicle's safety belt will fasten
around you, you should use it.
But if a safety belt is not long
enough, your dealer will order you
an extender. When you go in to
order it, take the heaviest coat you
will wear, so the extender will be
long enough for you. To help avoid
personal injury, do not let someone
else use it, and use it only for the
seat it is made to fit. The extender
has been designed for adults. Never
use it for securing child seats. To
wear it, attach it to the regular safety
belt. For more information, see the
instruction sheet that comes with
the extender.
Safety System Check
Now and then, check that the safety
belt reminder light, safety belts,
buckles, latch plates, retractors, and
anchorages are all working properly.
Look for any other loose or
damaged safety belt system parts
that might keep a safety belt system
from doing its job. See your dealer
to have it repaired. Torn or frayed
safety belts may not protect you in a
crash. They can rip apart under
impact forces. If a belt is torn or
frayed, get a new one right away.
Make sure the safety belt reminder
light is working. See Safety BeltReminders on page 5‑17 for more
information.
Keep safety belts clean and dry.
See Safety Belt Care on page 3‑18.
Safety Belt Care
Keep belts clean and dry.
WARNING
{
Do not bleach or dye safety belts.
It may severely weaken them. In
a crash, they might not be able to
provide adequate protection.
Clean safety belts only with mild
soap and lukewarm water.
Page 71
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Seats and Restraints3-19
Replacing Safety Belt
System Parts after a
Crash
WARNING
{
A crash can damage the safety
belt system in the vehicle.
A damaged safety belt system
may not properly protect the
person using it, resulting in
serious injury or even death in a
crash. To help make sure the
safety belt systems are working
properly after a crash, have them
inspected and any necessary
replacements made as soon
as possible.
After a minor crash, replacement of
safety belts may not be necessary.
But the safety belt assemblies that
were used during any crash may
have been stressed or damaged.
See your dealer to have the safety
belt assemblies inspected or
replaced.
New parts and repairs may be
necessary even if the safety belt
system was not being used at the
time of the crash.
Have the safety belt pretensioners
checked if the vehicle has been in a
crash, or if the airbag readiness light
stays on after you start the vehicle
or while you are driving. See AirbagReadiness Light on page 5‑18.
Airbag System
The vehicle has the following
airbags:
.
A frontal airbag for the driver.
.
A frontal airbag for the right front
passenger.
The vehicle may have the following
airbags:
.
A seat‐mounted side impact
airbag for the driver.
.
A seat‐mounted side impact
airbag for the right front
passenger.
.
A roof-rail airbag for the driver
and the passenger seated
directly behind the driver.
.
A roof-rail airbag for the right
front passenger and the person
seated directly behind the right
front passenger.
All of the airbags in the vehicle will
have the word AIRBAG embossed
in the trim or on an attached label
near the deployment opening.
Page 72
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For frontal airbags, the word
AIRBAG will appear on the middle
part of the steering wheel for the
driver and on the instrument panel
for the right front passenger.
With seat‐mounted side impact
airbags, the word AIRBAG will
appear on the side of the
seatback closest to the door.
With roof-rail airbags, the word
AIRBAG will appear along the
headliner or trim.
Airbags are designed to supplement
the protection provided by safety
belts. Even though today's airbags
are also designed to help reduce
the risk of injury from the force of an
inflating bag, all airbags must inflate
very quickly to do their job.
Here are the most important things
to know about the airbag system:
WARNING
{
You can be severely injured or
killed in a crash if you are not
wearing your safety belt — even if
you have airbags. Airbags are
designed to work with safety
belts, but do not replace them.
Also, airbags are not designed to
deploy in every crash. In some
crashes safety belts are your only
restraint. See When Should anAirbag Inflate? on page 3‑23.
Wearing your safety belt during a
crash helps reduce your chance
of hitting things inside the vehicle
or being ejected from it. Airbags
are “supplemental restraints” to
the safety belts. Everyone in your
vehicle should wear a safety belt
properly — whether or not there is
an airbag for that person.
WARNING
{
Because airbags inflate with great
force and faster than the blink of
an eye, anyone who is up
against, or very close to any
airbag when it inflates can be
seriously injured or killed. Do not
sit unnecessarily close to any
airbag, as you would be if sitting
on the edge of the seat or leaning
forward. Safety belts help keep
you in position before and during
a crash. Always wear a safety
belt, even with airbags. The driver
should sit as far back as possible
while still maintaining control of
the vehicle.
Occupants should not lean on or
sleep against the door or side
windows in seating positions with
seat-mounted side impact airbags
and/or roof-rail airbags.
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WARNING
{
Children who are up against,
or very close to, any airbag when
it inflates can be seriously injured
or killed. Airbags plus
lap-shoulder belts offer protection
for adults and older children, but
not for young children and infants.
Neither the vehicle safety belt
system nor its airbag system is
designed for them. Young
children and infants need the
protection that a child restraint
system can provide. Always
secure children properly in the
vehicle. To read how, see Older
Children on page 3‑35 or Infants
and Young Children on
page 3‑37.
There is an airbag readiness light
on the instrument panel cluster,
which shows the airbag symbol.
The system checks the airbag
electrical system for malfunctions.
The light tells you if there is an
electrical problem. See AirbagReadiness Light on page 5‑18 for
more information.
Where Are the Airbags?
The driver frontal airbag is in the
middle of the steering wheel.
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The right front passenger frontal
airbag is in the instrument panel on
the passenger side.
Driver Side Shown, Passenger
Side Similar
If the vehicle has seat‐mounted side
impact airbags for the driver and
right front passenger, they are in the
side of the seatbacks closest to
the door.
Driver Side Shown, Passenger
Side Similar
If the vehicle has roof-rail airbags
for the driver, right front passenger,
and second row outboard
passengers, they are in the ceiling
above the side windows.
WARNING
{
If something is between an
occupant and an airbag, the
airbag might not inflate properly
or it might force the object into
(Continued)
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GMCSierraDenaliOwnerManual-2012
Seats and Restraints3-23
WARNING (Continued)
that person causing severe injury
or even death. The path of an
inflating airbag must be kept
clear. Do not put anything
between an occupant and an
airbag, and do not attach or put
anything on the steering wheel
hub or on or near any other
airbag covering.
Do not use seat accessories that
block the inflation path of a
seat-mounted side impact airbag.
Never secure anything to the roof
of a vehicle with roof-rail airbags
by routing a rope or tie‐down
through any door or window
opening. If you do, the path of an
inflating roof-rail airbag will be
blocked.
When Should an Airbag
Inflate?
Frontal airbags are designed to
inflate in moderate to severe frontal
or near-frontal crashes to help
reduce the potential for severe
injuries mainly to the driver's or right
front passenger's head and chest.
However, they are only designed to
inflate if the impact exceeds a
predetermined deployment
threshold. Deployment thresholds
are used to predict how severe a
crash is likely to be in time for the
airbags to inflate and help restrain
the occupants.
Whether the frontal airbags will or
should deploy is not based on how
fast your vehicle is traveling.
It depends largely on what you hit,
the direction of the impact, and how
quickly your vehicle slows down.
Frontal airbags may inflate at
different crash speeds. For
example:
.
If the vehicle hits a stationary
object, the airbags could inflate
at a different crash speed than if
the vehicle hits a moving object.
.
If the vehicle hits an object that
deforms, the airbags could
inflate at a different crash speed
than if the vehicle hits an object
that does not deform.
.
If the vehicle hits a narrow object
(like a pole), the airbags could
inflate at a different crash speed
than if the vehicle hits a wide
object (like a wall).
.
If the vehicle goes into an object
at an angle, the airbags could
inflate at a different crash speed
than if the vehicle goes straight
into the object.
Thresholds can also vary with
specific vehicle design.
Page 76
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Frontal airbags are not intended to
inflate during vehicle rollovers, rear
impacts, or in many side impacts.
If the GVWR (Gross Vehicle Weight
Rating) of your vehicle is 3 855 kg
(8,500 lb) or above, the vehicle has
single stage airbags. If the GVWR is
below 3 855 kg (8,500 lb) then the
vehicle has dual stage airbags.
Vehicles with a full bench seat are
equipped with single state airbags.
You can find the GVWR on the
certification label on the rear edge
of the driver door. See Vehicle LoadLimits on page 9‑16 for more
information.
The vehicle may have dual‐stage
frontal airbags. Dual-stage airbags
adjust the restraint according to
crash severity. The vehicle has
electronic frontal sensors, which
help the sensing system distinguish
between a moderate frontal impact
and a more severe frontal impact.
For moderate frontal impacts,
dual-stage airbags inflate at a
level less than full deployment.
For more severe frontal impacts, full
deployment occurs.
Vehicles with dual stage airbags
also have a seat position sensor
which enables the sensing system
to monitor the position of the driver
seat (all models) and the right front
passenger seat (light-duty models
only). The seat position sensor
provides information that is used to
determine if the airbags should
deploy at a reduced level or at full
deployment.
The vehicle may have seat‐mounted
side impact airbags. The vehicle
has roof-rail airbags. See AirbagSystem on page 3‑19. Seat‐
mounted side impact and roof-rail
airbags are intended to inflate in
moderate to severe side crashes.
In addition, these roof-rail airbags
are intended to inflate during a
rollover or in a severe frontal
impact. Seat‐mounted side impact
and roof-rail airbags will inflate if
the crash severity is above the
system's designed threshold level.
The threshold level can vary with
specific vehicle design.
Roof-rail airbags are not intended
to inflate in rear impacts. A seat‐
mounted side impact airbag is
intended to deploy on the side of the
vehicle that is struck. Both roof-rail
airbags will deploy when either side
of the vehicle is struck, or if the
sensing system predicts that the
vehicle is about to roll over, or in a
severe frontal impact.
In any particular crash, no one can
say whether an airbag should have
inflated simply because of the
damage to a vehicle or because
of what the repair costs were.
For frontal airbags, inflation is
determined by what the vehicle hits,
the angle of the impact, and how
quickly the vehicle slows down.
For seat‐mounted side impact and
roof-rail airbags, deployment is
determined by the location and
severity of the side impact.
Page 77
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In a rollover event, roof-rail airbag
deployment is determined by the
direction of the roll.
What Makes an Airbag
Inflate?
In a deployment event, the sensing
system sends an electrical signal
triggering a release of gas from the
inflator. Gas from the inflator fills the
airbag causing the bag to break out
of the cover and deploy. The inflator,
the airbag, and related hardware are
all part of the airbag module.
Frontal airbag modules are located
inside the steering wheel and
instrument panel. For vehicles with
seat‐mounted side impact airbags,
there are airbags modules in the
side of the front seatbacks closest
to the door. For vehicles with
roof-rail airbags, there are airbag
modules in the ceiling of the vehicle,
near the side windows that have
occupant seating positions.
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. Frontal
airbags distribute the force of the
impact more evenly over the
occupant's upper body, stopping the
occupant more gradually. Seat‐
mounted side impact and roof-rail
airbags distribute the force of the
impact more evenly over the
occupant's upper body.
Rollover capable roof-rail airbags
are designed to help contain the
head and chest of occupants in the
outboard seating positions in the
first and second rows. The rollover
capable roof-rail airbags are
designed to help reduce the risk of
full or partial ejection in rollover
events, although no system can
prevent all such ejections.
But airbags would not help in
many types of collisions, primarily
because the occupant's motion is
not toward those airbags. See When
Should an Airbag Inflate? on
page 3‑23 for more information.
Airbags should never be regarded
as anything more than a supplement
to safety belts.
What Will You See after
an Airbag Inflates?
After the frontal airbags and
seat-mounted side impact airbags
inflate, they quickly deflate, so
quickly that some people may not
even realize an airbag inflated.
Roof-rail airbags may still be at least
partially inflated for some time after
they deploy. Some components of
the airbag module may be hot for
several minutes. For location of the
airbag modules, see What Makesan Airbag Inflate? on page 3‑25.
Page 78
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3-26Seats and Restraints
The parts of the airbag that come
into contact with you may be warm,
but not too hot to touch. There may
be some smoke and dust coming
from the vents in the deflated
airbags. Airbag inflation does not
prevent the driver from seeing out of
the windshield or being able to steer
the vehicle, nor does it prevent
people from leaving the vehicle.
WARNING
{
When an airbag inflates, there
may be dust in the air. This dust
could cause breathing problems
for people with a history of
asthma or other breathing trouble.
To avoid this, everyone in the
vehicle should get out as soon as
it is safe to do so. If you have
breathing problems but cannot
get out of the vehicle after an
airbag inflates, then get fresh air
by opening a window or a door.
(Continued)
WARNING (Continued)
If you experience breathing
problems following an airbag
deployment, you should seek
medical attention.
The vehicle may have a feature that
may automatically unlock the doors,
turn on the interior lamps and
hazard warning flashers, and shut
off the fuel system after the airbags
inflate. You can lock the doors, turn
off the interior lamps and hazard
warning flashers by using the
controls for those features.
WARNING
{
A crash severe enough to inflate
the airbags may have also
damaged important functions in
the vehicle, such as the fuel
system, brake and steering
systems, etc.
(Continued)
WARNING (Continued)
Even if the vehicle appears to be
drivable after a moderate crash,
there may be concealed damage
that could make it difficult to
safely operate the vehicle.
Use caution if you should attempt
to restart the engine after a crash
has occurred.
In many crashes severe enough to
inflate the airbag, windshields are
broken by vehicle deformation.
Additional windshield breakage may
also occur from the right front
passenger airbag.
.
Airbags are designed to inflate
only once. After an airbag
inflates, you will need some new
parts for the airbag system.
If you do not get them, the
airbag system will not be there
to help protect you in another
crash. A new system will include
airbag modules and possibly
Page 79
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GMCSierraDenaliOwnerManual-2012
Seats and Restraints3-27
other parts. The service manual
for your vehicle covers the need
to replace other parts.
.
The vehicle has a crash sensing
and diagnostic module which
records information after a
crash. See Vehicle Data
Recording and Privacy on
page 13‑19 and Event Data
Recorders on page 13‑20.
.
Let only qualified technicians
work on the airbag systems.
Improper service can mean that
an airbag system will not work
properly. See your dealer for
service.
Passenger Sensing
System
If the vehicle has the passenger
airbag status indicator pictured in
the following illustration, then the
vehicle has a passenger sensing
system for the right front passenger
position. The passenger airbag
status indicator, if equipped, is
visible on the overhead console
when the vehicle is started.
In addition, if the vehicle has a
passenger sensing system for the
right front passenger position, the
label on the vehicle's sun visors
refers to “ADVANCED AIRBAGS.”
United States
Canada and Mexico
The words ON and OFF, or the
symbols for on and off, will be
visible during the system check.
If you are using remote start,
if equipped, to start the vehicle from
a distance, you may not see the
system check. When the system
check is complete, either the word
ON or OFF, or the symbol for on or
off, will be visible. See Passenger
Airbag Status Indicator on
page 5‑19.
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3-28Seats and Restraints
The passenger sensing system will
turn off the right front passenger
frontal airbag under certain
conditions. The driver airbag,
seat‐mounted side impact airbags
(if equipped) and the roof-rail
airbags (if equipped) are not
affected by the passenger sensing
system.
The passenger sensing system
works with sensors that are part of
the right front passenger seat and
safety belt. The sensors are
designed to detect the presence of
a properly-seated occupant and
determine if the right front
passenger frontal airbag should be
enabled (may inflate) or not.
According to accident statistics,
children are safer when properly
secured in a rear seat in the correct
child restraint for their weight
and size.
We recommend that children be
secured in a rear seat, including: an
infant or a child riding in a
rear-facing child restraint; a child
riding in a forward-facing child seat;
an older child riding in a booster
seat; and children, who are large
enough, using safety belts.
A label on the sun visor says,
“Never put a rear-facing child seat in
the front.” This is because the risk to
the rear-facing child is so great if the
airbag deploys.
WARNING
{
A child in a rear-facing child
restraint can be seriously injured
or killed if the right front
passenger airbag inflates.
This is because the back of the
rear-facing child restraint would
be very close to the inflating
airbag. A child in a forward-facing
child restraint can be seriously
(Continued)
WARNING (Continued)
injured or killed if the right front
passenger airbag inflates and the
passenger seat is in a forward
position.
Even if the passenger sensing
system has turned off the right
front passenger frontal airbag, no
system is fail-safe. No one can
guarantee that an airbag will not
deploy under some unusual
circumstance, even though the
airbag is turned off.
Secure rear-facing child restraints
in a rear seat, even if the
airbag is off. If you secure a
forward-facing child restraint in
the right front seat, always move
the front passenger seat as far
back as it will go. It is better to
secure the child restraint in a
rear seat.
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The passenger sensing system is
designed to turn off the right front
passenger frontal airbag if:
.
The right front passenger seat is
unoccupied.
.
The system determines an infant
is present in a child restraint.
.
A right front passenger takes
his/her weight off of the seat for
a period of time.
.
There is a critical problem with
the airbag system or the
passenger sensing system.
When the passenger sensing
system has turned off the right front
passenger frontal airbag, the off
indicator will light and stay lit as a
reminder that the airbag is off. See
Passenger Airbag Status Indicator
on page 5‑19.
The passenger sensing system is
designed to turn on (may inflate) the
right front passenger frontal airbag
anytime the system senses that a
person of adult size is sitting
properly in the right front
passenger seat.
When the passenger sensing
system has allowed the airbag to be
enabled, the on indicator will light
and stay lit as a reminder that the
airbag is active.
For some children, including
children in child restraints, and for
very small adults, the passenger
sensing system may or may not
turn off the right front passenger
frontal airbag, depending upon
the person's seating posture and
body build. Everyone in the vehicle
who has outgrown child restraints
should wear a safety belt
properly — whether or not there is
an airbag for that person.
WARNING
{
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong
with the airbag system. To help
avoid injury to yourself or others,
have the vehicle serviced right
away. See Airbag ReadinessLight on page 5‑18 for more
information, including important
safety information.
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If the On Indicator is Lit for a
Child Restraint
If a child restraint has been installed
and the on indicator is lit:
1. Turn the vehicle off.
2. Remove the child restraint from
the vehicle.
3. Remove any additional items
from the seat such as blankets,
cushions, seat covers, seat
heaters, or seat massagers.
4. Reinstall the child restraint
following the directions
provided by the child restraint
manufacturer and refer to
Securing Child Restraints (Rear
Seat Position) on page 3‑51 or
Securing Child Restraints (Right
Front Seat Position) on
page 3‑53.
5. If, after reinstalling the child
restraint and restarting the
vehicle, the on indicator is still lit,
turn the vehicle off. Then slightly
recline the vehicle seatback and
adjust the seat cushion,
if adjustable, to make sure that
the vehicle seatback is not
pushing the child restraint into
the seat cushion.
Also make sure the child
restraint is not trapped under the
vehicle head restraint. If this
happens, adjust the head
restraint. See Head Restraintson page 3‑2.
6. Restart the vehicle.
The passenger sensing system
may or may not turn off the
airbag for a child in a child
restraint depending upon the
child’s seating posture and body
build. It is better to secure the
child restraint in a rear seat.
If the Off Indicator is Lit for an
Adult-Size Occupant
If a person of adult size is sitting in
the right front passenger seat, but
the off indicator is lit, it could be
because that person is not sitting
properly in the seat.
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If this happens, use the following
steps to allow the system to detect
that person and enable the right
front passenger frontal airbag:
1. Turn the vehicle off.
2. Remove any additional material
from the seat, such as blankets,
cushions, seat covers, seat
heaters, or seat massagers.
3. Place the seatback in the fully
upright position.
4. Have the person sit upright in
the seat, centered on the seat
cushion, with legs comfortably
extended.
5. Restart the vehicle and have the
person remain in this position for
two to three minutes after the on
indicator is lit.
Additional Factors Affecting
System Operation
Safety belts help keep the
passenger in position on the seat
during vehicle maneuvers and
braking, which helps the passenger
sensing system maintain the
passenger airbag status. See
“Safety Belts” and “Child Restraints”
in the Index for additional
information about the importance of
proper restraint use.
If the shoulder portion of the belt is
pulled out all the way, the child
restraint locking feature will be
engaged. This may unintentionally
cause the passenger sensing
system to turn the airbag off for
some adult‐size occupants. If this
happens, let the belt go back all the
way and start again.
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. We recommend that you
not use seat covers or other
aftermarket equipment except when
approved by GM for your specific
vehicle. See Adding Equipment to
the Airbag-Equipped Vehicle on
page 3‑32 for more information
about modifications that can affect
how the system operates.
The on indicator may be lit if an
object, such as a briefcase,
handbag, grocery bag, laptop,
or other electronic device, is put on
an unoccupied seat. If this is not
desired, remove the object from
the seat.
WARNING
{
Stowing of articles under the
passenger seat or between the
passenger seat cushion and
seatback may interfere with the
proper operation of the passenger
sensing system.
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3-32Seats and Restraints
Servicing the
Airbag-Equipped Vehicle
Airbags affect how the vehicle
should be serviced. There are parts
of the airbag system in several
places around the vehicle. Your
dealer and the service manual have
information about servicing the
vehicle and the airbag system.
To purchase a service manual, see
Service Publications Ordering
Information on page 13‑17.
WARNING
{
For up to 10 seconds after the
vehicle is turned off and the
battery is disconnected, an airbag
can still inflate during improper
service. You can be injured if you
are close to an airbag when it
inflates. Avoid yellow connectors.
They are probably part of the
airbag system.
(Continued)
WARNING (Continued)
Be sure to follow proper service
procedures, and make sure the
person performing work for you is
qualified to do so.
Adding Equipment to the
Airbag-Equipped Vehicle
Q: Is there anything I might add
to or change about the vehicle
that could keep the airbags
from working properly?
A: Yes. If you add things that
change the vehicle's frame,
bumper system, height, front end
or side sheet metal, they may
keep the airbag system from
working properly. Changing or
moving any parts of the front
seats, safety belts, the airbag
sensing and diagnostic module,
steering wheel, instrument
panel, roof-rail airbag modules,
ceiling headliner or pillar garnish
trim, overhead console, front
sensors, side impact sensors,
or airbag wiring can affect the
operation of the airbag system.
In addition, the vehicle may have
a passenger sensing system for
the right front passenger
position, which includes sensors
that are part of the passenger
seat. The passenger sensing
system may not operate properly
if the original seat trim is
replaced with non-GM covers,
upholstery or trim, or with
GM covers, upholstery or trim
designed for a different vehicle.
Any object, such as an
aftermarket seat heater or a
comfort enhancing pad or
device, installed under or on
top of the seat fabric, could also
interfere with the operation of
the passenger sensing system.
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Seats and Restraints3-33
This could either prevent proper
deployment of the passenger
airbag(s) or prevent the
passenger sensing system from
properly turning off the
passenger airbag(s). See
Passenger Sensing System on
page 3‑27.
If you have any questions, call
Customer Assistance. The
phone numbers and addresses
for Customer Assistance are in
Step Two of the Customer
Satisfaction Procedure in this
manual. See Customer
Satisfaction Procedure (U.S. and
Canada) on page 13‑1 or
Customer Satisfaction
Procedure (Mexico) on
page 13‑3.
If the vehicle has rollover
roof-rail airbags, see Different
Size Tires and Wheels on
page 10‑68 for additional
important information.
Q: Because I have a disability,
I have to get my vehicle
modified. How can I find out
whether this will affect my
airbag system?
A: If you have questions, call
Customer Assistance. The
phone numbers and addresses
for Customer Assistance are in
Step Two of the Customer
Satisfaction Procedure in this
manual. See Customer
Satisfaction Procedure (U.S. and
Canada) on page 13‑1 or
Customer Satisfaction
Procedure (Mexico) on
page 13‑3.
In addition, your dealer and the
service manual have information
about the location of the airbag
sensors, sensing and diagnostic
module and airbag wiring.
Airbag System Check
The airbag system does not need
regularly scheduled maintenance or
replacement. Make sure the airbag
readiness light is working. See
Airbag Readiness Light on
page 5‑18 for more information.
Notice: If an airbag covering is
damaged, opened, or broken, the
airbag may not work properly.
Do not open or break the airbag
coverings. If there are any
opened or broken airbag covers,
have the airbag covering and/or
airbag module replaced. For the
location of the airbags, see
Where Are the Airbags? on
page 3‑21. See your dealer for
service.
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3-34Seats and Restraints
Replacing Airbag System
Parts after a Crash
WARNING
{
A crash can damage the
airbag systems in the vehicle.
A damaged airbag system may
not work properly and may
not protect you and your
passenger(s) in a crash, resulting
in serious injury or even death.
(Continued)
WARNING (Continued)
To help make sure the airbag
systems are working properly
after a crash, have them
inspected and any necessary
replacements made as soon
as possible.
If an airbag inflates, you will need
to replace airbag system parts.
See your dealer for service.
If the airbag readiness light stays
on after the vehicle is started or
comes on when you are driving,
the airbag system may not work
properly. Have the vehicle serviced
right away. See Airbag ReadinessLight on page 5‑18 for more
information.
Page 87
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Child Restraints
Older Children
Older children who have outgrown
booster seats should wear the
vehicle safety belts.
The manufacturer's instructions that
come with the booster seat state the
weight and height limitations for that
booster. Use a booster seat with a
lap-shoulder belt until the child
passes the fit test below:
.
Sit all the way back on the seat.
Do the knees bend at the seat
edge? If yes, continue. If no,
return to the booster seat.
.
Buckle the lap-shoulder belt.
Does the shoulder belt rest on
the shoulder? If yes, continue.
If no, try using the rear safety
belt comfort guide. See “Rear
Safety Belt Comfort Guides”
under Lap-Shoulder Belt onpage 3‑12 for more information.
If the shoulder belt still does not
rest on the shoulder, then return
to the booster seat.
Seats and Restraints3-35
.
Does the lap belt fit low and
snug on the hips, touching the
thighs? If yes, continue. If no,
return to the booster seat.
.
Can proper safety belt fit be
maintained for the length of the
trip? If yes, continue. If no,
return to the booster seat.
Page 88
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3-36Seats and Restraints
Q: What is the proper way to
wear safety belts?
A: An older child should wear a
lap-shoulder belt and get the
additional restraint a shoulder
belt can provide. The shoulder
belt should not cross the face or
neck. The lap belt should fit
snugly below the hips, just
touching the top of the thighs.
This applies belt force to the
child's pelvic bones in a crash.
It should never be worn over the
abdomen, which could cause
severe or even fatal internal
injuries in a crash.
Also see “Rear Safety Belt Comfort
Guides” under Lap-Shoulder Belt onpage 3‑12.
According to accident statistics,
children and infants are safer when
properly restrained in a child
restraint system or infant restraint
system secured in a rear seating
position.
In a crash, children who are not
buckled up can strike other people
who are buckled up, or can be
thrown out of the vehicle. Older
children need to use safety belts
properly.
WARNING
{
Never do this.
Never allow two children to
wear the same safety belt. The
safety belt cannot properly spread
the impact forces. In a crash, the
two children can be crushed
together and seriously injured.
A safety belt must be used by
only one person at a time.
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Seats and Restraints3-37
WARNING
{
Never do this.
Never allow a child to wear the
safety belt with the shoulder belt
behind their back. A child can be
seriously injured by not wearing
the lap-shoulder belt properly.
In a crash, the child would not be
restrained by the shoulder belt.
The child could move too far
forward increasing the chance of
head and neck injury. The child
might also slide under the lap
belt. The belt force would then be
applied right on the abdomen.
That could cause serious or fatal
injuries. The shoulder belt should
go over the shoulder and across
the chest.
Infants and Young
Children
Everyone in a vehicle needs
protection! This includes infants and
all other children. Neither the
distance traveled nor the age and
size of the traveler changes the
need, for everyone, to use safety
restraints. In fact, the law in every
state in the United States and in
every Canadian province says
children up to some age must be
restrained while in a vehicle.
WARNING
{
Children can be seriously injured
or strangled if a shoulder belt is
wrapped around their neck and
the safety belt continues to
tighten. Never leave children
unattended in a vehicle and never
allow children to play with the
safety belts.
Page 90
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3-38Seats and Restraints
Airbags plus lap‐shoulder belts offer
protection for adults and older
children, but not for young children
and infants. Neither the vehicle's
safety belt system nor its airbag
system is designed for them. Every
time infants and young children ride
in vehicles, they should have the
protection provided by appropriate
child restraints.
Children who are not restrained
properly can strike other people,
or can be thrown out of the vehicle.
WARNING
{
Never do this.
Never hold an infant or a child
while riding in a vehicle. Due to
crash forces, an infant or a child
will become so heavy it is not
possible to hold it during a crash.
For example, in a crash at only
40 km/h (25 mph), a 5.5 kg (12 lb)
infant will suddenly become a
110 kg (240 lb) force on a person's
arms. An infant should be
secured in an appropriate
restraint.
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Seats and Restraints3-39
WARNING
{
Never do this.
Children who are up against,
or very close to, any airbag when
it inflates can be seriously injured
or killed. Never put a rear-facing
child restraint in the right front
seat. Secure a rear-facing child
restraint in a rear seat. It is also
better to secure a forward-facing
child restraint in a rear seat. If you
must secure a forward-facing
child restraint in the right front
seat, always move the front
passenger seat as far back as it
will go.
Q: What are the different types of
add-on child restraints?
A: Add-on child restraints, which
are purchased by the vehicle
owner, are available in four basic
types. Selection of a particular
restraint should take into
consideration not only the child's
weight, height, and age but also
whether or not the restraint will
be compatible with the motor
vehicle in which it will be used.
For most basic types of child
restraints, there are many
different models available. When
purchasing a child restraint, be
sure it is designed to be used in
a motor vehicle. If it is, the
restraint will have a label saying
that it meets federal motor
vehicle safety standards.
The restraint manufacturer's
instructions that come with the
restraint state the weight and
height limitations for a particular
child restraint.
Page 92
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3-40Seats and Restraints
In addition, there are many kinds
of restraints available for
children with special needs.
WARNING
{
To reduce the risk of neck and
head injury during a crash, infants
need complete support. This is
because an infant's neck is not
fully developed and its head
weighs so much compared with
the rest of its body. In a crash, an
infant in a rear-facing child
restraint settles into the restraint,
so the crash forces can be
distributed across the strongest
part of an infant's body, the back
and shoulders. Infants should
always be secured in rear-facing
child restraints.
WARNING
{
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. To reduce the risk of
serious or fatal injuries during a
crash, young children should
always be secured in appropriate
child restraints.
Child Restraint Systems
(A) Rear‐Facing Infant Seat
A rear-facing infant seat (A)
provides restraint with the seating
surface against the back of the
infant.
The harness system holds the infant
in place and, in a crash, acts to
keep the infant positioned in the
restraint.
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(B) Forward-Facing Child Seat
A forward-facing child seat (B)
provides restraint for the child's
body with the harness.
(C) Booster Seats
A booster seat (C) is a child restraint
designed to improve the fit of the
vehicle's safety belt system.
A booster seat can also help a child
to see out the window.
Seats and Restraints3-41
Securing an Add-On Child
Restraint in the Vehicle
WARNING
{
A child can be seriously injured or
killed in a crash if the child
restraint is not properly secured in
the vehicle. Secure the child
restraint properly in the vehicle
using the vehicle safety belt or
LATCH system, following the
instructions that came with that
child restraint and the instructions
in this manual.
To help reduce the chance of injury,
the child restraint must be secured
in the vehicle. Child restraint
systems must be secured in vehicle
seats by lap belts or the lap belt
portion of a lap-shoulder belt, or by
the LATCH system. See Lower
Anchors and Tethers for Children
(LATCH System) on page 3‑44 for
more information.
Page 94
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3-42Seats and Restraints
Children can be endangered in a
crash if the child restraint is not
properly secured in the vehicle.
When securing an add-on child
restraint, refer to the instructions
that come with the restraint which
may be on the restraint itself or in a
booklet, or both, and to this manual.
The child restraint instructions are
important, so if they are not
available, obtain a replacement
copy from the manufacturer.
Keep in mind that an unsecured
child restraint can move around in a
collision or sudden stop and injure
people in the vehicle. Be sure to
properly secure any child restraint in
the vehicle — even when no child
is in it.
In some areas of the United States
and Canada, Certified Child
Passenger Safety Technicians
(CPSTs) are available to inspect
and demonstrate how to correctly
use and install child restraints.
In the U.S., refer to the National
Highway Traffic Safety
Administration (NHTSA) website to
locate the nearest child safety seat
inspection station. For CPST
availability in Canada, check with
Transport Canada or the Provincial
Ministry of Transportation office.
Securing the Child Within the
Child Restraint
WARNING
{
A child can be seriously injured or
killed in a crash if the child is not
properly secured in the child
restraint. Secure the child
properly following the instructions
that came with that child restraint.
Where to Put the
Restraint
According to accident statistics,
children and infants are safer when
properly restrained in a child
restraint system or infant restraint
system secured in a rear seating
position.
We recommend that children and
child restraints be secured in a rear
seat, including: an infant or a child
riding in a rear-facing child restraint;
a child riding in a forward-facing
child seat; an older child riding in a
booster seat; and children, who are
large enough, using safety belts.
A label on your sun visor says,
“Never put a rear-facing child seat in
the front.” This is because the risk to
the rear-facing child is so great,
if the airbag deploys.
Page 95
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Seats and Restraints3-43
WARNING
{
A child in a rear-facing child
restraint can be seriously
injured or killed if the right front
passenger airbag inflates.
This is because the back of the
rear-facing child restraint would
be very close to the inflating
airbag. A child in a forward-facing
child restraint can be seriously
injured or killed if the right front
passenger airbag inflates and the
passenger seat is in a forward
position.
The vehicle may have a
passenger sensing system which
is designed to turn off the right
front passenger frontal airbag
under certain conditions.
Even if the passenger sensing
system, if equipped, has turned
off the right front passenger
frontal airbag, no system is
(Continued)
WARNING (Continued)
fail-safe. No one can guarantee
that an airbag will not deploy
under some unusual
circumstance, even though it is
turned off.
Secure rear-facing child
restraints in a rear seat, even if
the airbag is off. If you secure a
forward-facing child restraint in
the right front seat, always move
the front passenger seat as far
back as it will go. It is better to
secure the child restraint in a
rear seat.
See Passenger Sensing Systemon page 3‑27 for additional
information.
WARNING
{
A child in a child restraint in the
center front seat can be badly
injured or killed by the frontal
airbags if they inflate. Never
secure a child restraint in the
center front seat. It is always
better to secure a child restraint in
a rear seat.
Do not use child restraints in the
center front seat position.
When securing a child restraint in a
rear seating position, study the
instructions that came with your
child restraint to make sure it is
compatible with this vehicle.
Child restraints and booster seats
vary considerably in size, and some
may fit in certain seating positions
better than others. Always make
sure the child restraint is properly
secured.
Page 96
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3-44Seats and Restraints
Depending on where you place the
child restraint and the size of the
child restraint, you may not be able
to access adjacent safety belt
assemblies or LATCH anchors for
additional passengers or child
restraints. Adjacent seating
positions should not be used if the
child restraint prevents access to or
interferes with the routing of the
safety belt.
Wherever a child restraint is
installed, be sure to secure the
child restraint properly.
Keep in mind that an unsecured
child restraint can move around in a
collision or sudden stop and injure
people in the vehicle. Be sure to
properly secure any child restraint in
your vehicle — even when no child
is in it.
Lower Anchors and
Tethers for Children
(LATCH System)
The LATCH system holds a child
restraint during driving or in a crash.
This system is designed to make
installation of a child restraint easier.
The LATCH system uses anchors in
the vehicle and attachments on the
child restraint that are made for use
with the LATCH system.
Make sure that a LATCH-compatible
child restraint is properly installed
using the anchors, or use the
vehicle's safety belts to secure the
restraint, following the instructions
that came with that restraint, and
also the instructions in this manual.
When installing a child restraint with
a top tether, you must also use
either the lower anchors or the
safety belts to properly secure the
child restraint. A child restraint must
never be installed using only the top
tether and anchor.
In order to use the LATCH system in
your vehicle, you need a child
restraint that has LATCH
attachments. The child restraint
manufacturer will provide you with
instructions on how to use the child
restraint and its attachments. The
following explains how to attach a
child restraint with these
attachments in your vehicle.
Not all vehicle seating positions or
child restraints have lower anchors
and attachments or top tether
anchors and attachments.
Page 97
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Seats and Restraints3-45
Lower Anchors
Lower anchors (A) are metal bars
built into the vehicle. There are
two lower anchors for each LATCH
seating position that will
accommodate a child restraint with
lower attachments (B).
Top Tether Anchor
A top tether (A, C) anchors the top
of the child restraint to the vehicle.
A top tether anchor is built into the
vehicle. The top tether
attachment (B) on the child restraint
connects to the top tether anchor in
the vehicle in order to reduce the
forward movement and rotation of
the child restraint during driving or in
a crash.
Your child restraint may have a
single tether (A) or a dual tether (C).
Either will have a single
attachment (B) to secure the top
tether to the anchor.
Some child restraints that have a
top tether are designed for use with
or without the top tether being
attached. Others require the top
tether always to be attached. In
Canada, the law requires that
forward-facing child restraints have
a top tether, and that the tether be
attached. Be sure to read and follow
the instructions for your child
restraint.
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3-46Seats and Restraints
Lower Anchor and Top Tether
Anchor Locations
Rear Seat
i (Top Tether Anchor): Seating
positions with top tether anchors.
j (Lower Anchor): Seating
positions with two lower anchors.
The rear outboard seating positions
have exposed metal lower anchors
located in the crease between the
seatback and the seat cushion.
The top tether anchors are the loops
located near the top of the seatback
for each rear seating position.
These loops will be used to route
the top tether through, as well as, to
secure the top tether in the vehicle.
Be sure to use an anchor (loop)
located on the same side of the
vehicle as the seating position
where the child restraint will be
placed.
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Seats and Restraints3-47
Be sure to read the instructions
below to properly install a child
restraint using these loops.
Do not secure a child restraint in a
position without a top tether anchor
if a national or local law requires
that the top tether be attached, or if
the instructions that come with the
child restraint say that the top tether
must be attached.
According to accident statistics,
children and infants are safer when
properly restrained in a child
restraint system or infant restraint
system secured in a rear seating
position. See Where to Put theRestraint on page 3‑42 for
additional information.
Securing a Child Restraint
Designed for the LATCH
System
WARNING
{
If a LATCH-type child restraint is
not attached to anchors, the child
restraint will not be able to protect
the child correctly.
In a crash, the child could be
seriously injured or killed. Install a
LATCH-type child restraint
properly using the anchors,
or use the vehicle safety belts to
secure the restraint, following the
instructions that came with the
child restraint and the instructions
in this manual.
WARNING
{
Do not attach more than one child
restraint to a single anchor,
except for the center top tether
anchors in the crew cab models.
Attaching more than one child
restraint to a single anchor could
cause the anchor or attachment
to come loose or even break
during a crash. A child or others
could be injured. To reduce the
risk of serious or fatal injuries
during a crash, attach only one
child restraint per anchor.
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3-48Seats and Restraints
WARNING
{
Children can be seriously injured
or strangled if a shoulder belt is
wrapped around their neck and
the safety belt continues to
tighten. Buckle 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 the vehicle has one, after the
child restraint has been installed.
Notice: Do not let the LATCH
attachments rub against the
vehicle’s safety belts. This may
damage these parts. If necessary,
move buckled safety belts to
avoid rubbing the LATCH
attachments.
Do not fold the empty rear seat
with a safety belt buckled. This
could damage the safety belt or
the seat. Unbuckle and return the
safety belt to its stowed position,
before folding the seat.
1. Attach and tighten the lower
attachments to the lower
anchors. If the child restraint
does not have lower
attachments or the desired
seating position does not have
lower anchors, secure the child
restraint with the top tether and
the safety belts. Refer to your
child restraint manufacturer
instructions and the instructions
in this manual.
1.1. Find the lower anchors for
the desired seating
position.
1.2. Put the child restraint on
the seat.
1.3. Attach and tighten the lower
attachments on the child
restraint to the lower
anchors.
2. If the child restraint manufacturer
recommends that the top tether
be attached, attach and tighten
the top tether to the top tether
anchor (loop), if your vehicle
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