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, and SIERRA
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. 20902916 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.
If the vehicle is a hybrid, see the
hybrid supplement for more
information.
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)
GMCSierraOwnerManual-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)
GMCSierraOwnerManual-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 5‑33.
D. Hazard Warning Flashers on
page 6‑5 (Out of View).
E. Instrument Cluster on
page 5‑13.
F.Shift Lever. See Automatic
Transmission on page 9‑37.
Tow/Haul Selector Button
(If Equipped). See Tow/HaulMode on page 9‑42.
Range Selection Mode (Allison
Transmission and Hydra-Matic
6‐Speed Button) (If Equipped).
See Manual Mode onpage 9‑41.
G. Infotainment on page 7‑1.
H. Instrument Panel Storage on
page 4‑1.
I.Integrated Trailer Brake
Controller (If Equipped). See
Trailer Towing on page 9‑84.
J. Exterior Lamp Controls on
page 6‑1.
K. Data Link Connector (DLC) (Out
of View). See MalfunctionIndicator Lamp on page 5‑25.
L. Hood Release. See Hood on
page 10‑5.
M. Parking Brake on page 9‑58.
®
N. Dome Lamps on page 6‑8.
Fog Lamps on page 6‑6
(If Equipped).
O. Cruise Control on page 9‑63.
P. Steering Wheel Adjustment on
page 5‑2.
Q. Horn on page 5‑5.
R. Steering Wheel Controls on
page 5‑3 (If Equipped).
S. Automatic Transfer Case
Control (If Equipped). See
Four-Wheel Drive on
page 10‑32.
T. Ashtray (If Equipped). See
Ashtrays on page 5‑12 and
Cigarette Lighter on page 5‑11.
Page 10
Blackplate(4,1)
GMCSierraOwnerManual-2012
1-4In Brief
U. StabiliTrak®System on
page 9‑59 (If Equipped).
Ultrasonic Parking Assist on
page 9‑66 (If Equipped).
Pedal Adjust Button (If
Equipped). See Adjustable
Throttle and Brake Pedal on
page 9‑27.
Exhaust Brake (If Equipped).
See “Brakes” in the Duramax
diesel supplement.
V. Power Outlets on page 5‑10.
W. Climate Control Systems (with
Air Conditioning) on page 8‑1 or
Climate Control Systems (with
Heater Only) on page 8‑4
(If Equipped).
Dual Automatic Climate Control
System on page 8‑5
(If Equipped).
X. Power Take Off (PTO) Control
(If Equipped). See Power Take
Off (PTO) in the Duramax diesel
supplement.
Y. Passenger Airbag Off Control
(If Equipped). See AirbagOn-Off Switch on page 3‑32.
Page 11
Blackplate(5,1)
GMCSierraOwnerManual-2012
2 NOTES
In Brief1-5
Page 12
Blackplate(6,1)
GMCSierraOwnerManual-2012
1-6In Brief
Instrument Panel (Premium Version)
Page 13
Blackplate(7,1)
GMCSierraOwnerManual-2012
In Brief1-7
A. Air Vents on page 8‑11.
B. Turn and Lane‐Change Lever.
See Turn and Lane-Change
Signals on page 6‑6.
Windshield Wiper/Washer on
page 5‑5.
C. Instrument Cluster on
page 5‑13.
D. Hazard Warning Flashers on
page 6‑5 (Out of View).
E. Shift Lever. See Automatic
Transmission on page 9‑37.
Range Selection Mode
(If Equipped). See ManualMode on page 9‑41.
F. Tow/Haul Mode on page 9‑42
(If Equipped).
G. Driver Information Center (DIC)
Buttons. See Driver InformationCenter (DIC) on page 5‑33.
H. Infotainment on page 7‑1.
I.Exterior Lamp Controls on
page 6‑1.
J. Integrated Trailer Brake
Controller (If Equipped). See
Trailer Towing on page 9‑84.
K. Dome Lamps on page 6‑8.
L. Automatic Transfer Case
Control (If Equipped). See
Four-Wheel Drive on
page 10‑32.
M. Data Link Connector (DLC) (Out
of View). See MalfunctionIndicator Lamp on page 5‑25.
N. Hood Release. See Hood on
page 10‑5.
O. Parking Brake on page 9‑58.
P. Cruise Control on page 9‑63.
Q. Steering Wheel Adjustment on
page 5‑2.
R. Horn on page 5‑5.
S. Steering Wheel Controls on
page 5‑3.
T. Climate Control Systems (with
Air Conditioning) on page 8‑1 or
Climate Control Systems (with
Heater Only) on page 8‑4
(If Equipped).
Dual Automatic Climate Control
System on page 8‑5
(If Equipped).
U. Power Outlets on page 5‑10.
Cigarette Lighter
(If Equipped). See Ashtrays on
page 5‑12 and Cigarette Lighter
on page 5‑11.
Page 14
Blackplate(8,1)
GMCSierraOwnerManual-2012
1-8In Brief
V. StabiliTrak®System on
page 9‑59 (If Equipped).
Pedal Adjust Button
(If Equipped). See Adjustable
Throttle and Brake Pedal on
page 9‑27.
Ultrasonic Parking Assist on
page 9‑66 (If Equipped).
Exhaust Brake (If Equipped).
See “Brakes” in the Duramax
diesel supplement.
W. Passenger Airbag Off Control
(If Equipped). See AirbagOn-Off Switch on page 3‑32.
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.
K again within three seconds
Press
to unlock all remaining doors.
Page 15
Blackplate(9,1)
GMCSierraOwnerManual-2012
In Brief1-9
Q : Press to lock all doors. Lock
and unlock feedback can be
personalized. See Vehicle
Personalization (With DIC Buttons)
on page 5‑52.
L : Press and release to locate
the vehicle. Press
more than two seconds to sound the
panic alarm. Press
cancel the panic alarm.
See Keys on page 2‑2 and Remote
Keyless Entry (RKE) System
Operation on page 2‑3.
L and hold for
L again to
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
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.
Page 16
Blackplate(10,1)
GMCSierraOwnerManual-2012
1-10In Brief
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 2‑7.
Windows
Turn the hand crank on each door
to manually raise or lower the
manual windows.
Power Windows
Crew Cab Shown
If available, the power window
switches are located on each door.
The driver door also has a switch for
the passenger and rear windows.
Push the switch to lower the
window. Pull the switch up to
raise it.
For more information, see:
.
Windows on page 2‑18.
.
Power Windows on page 2‑18.
Power Sliding Rear Window
On vehicles with a power sliding
rear window, the switch is located in
the overhead console. See RearWindows on page 2‑19.
.
Push the switch to open the
window.
.
Pull the switch to close the
window.
The power sliding rear window
cannot be operated manually.
Page 17
Blackplate(11,1)
GMCSierraOwnerManual-2012
In Brief1-11
Seat Adjustment
Manual Seats
To adjust the seat:
1. Lift the bar to unlock the seat.
2. Slide the seat to the desired
position and release the bar.
3. Try to move the seat back and
forth to be sure the seat is
locked in place.
See Seat Adjustment on page 3‑3
for more information.
Power Seats
To adjust a power seat, if equipped:
.
Move the seat forward or
rearward by sliding the control
forward or rearward.
.
If available, raise or lower the
front or rear part of the seat
cushion by moving the front or
rear of the control up or down.
.
If available, raise or lower the
entire seat by moving the entire
control up or down.
See Power Seat Adjustment onpage 3‑4 for more information.
Lumbar Adjustment
Manual Lumbar
If equipped, increase or decrease
manual lumbar support by turning
the knob forward or rearward.
See Lumbar Adjustment onpage 3‑4 for more information.
Page 18
Blackplate(12,1)
GMCSierraOwnerManual-2012
1-12In Brief
Power Lumbar
To adjust the power lumbar support,
if equipped:
.
On vehicles with two-way
lumbar, press and hold the top
or bottom of the control to
increase or decrease lumbar
support.
.
On vehicles with four-way
lumbar, press and hold the front
or rear of the control to increase
or decrease lumbar support. To
raise or lower the height of the
support, press and hold the top
or bottom of the control.
See Lumbar Adjustment onpage 3‑4 for more information.
Reclining Seatbacks
Manual Reclining Seatbacks
To recline a manual seatback:
1. Lift the lever.
2. Move the seatback to the
desired position, and then
release the lever to lock the
seatback in place.
3. Push and pull on the seatback to
make sure it is locked.
Page 19
Blackplate(13,1)
GMCSierraOwnerManual-2012
In Brief1-13
To return the seatback to the upright
position:
1. Lift the lever fully without
applying pressure to the
seatback, and the seatback will
return to the upright position.
2. Push and pull on the seatback to
make sure it is locked.
See Reclining Seatbacks onpage 3‑5 for more information.
Power Reclining Seatbacks
To adjust a power seatback,
if equipped:
.
Tilt the top of the control
rearward to recline.
.
Tilt the top of the control forward
to raise.
See Reclining Seatbacks onpage 3‑5 for more information.
Memory Features
On vehicles with the memory
feature, 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 equipped.
Page 20
Blackplate(14,1)
GMCSierraOwnerManual-2012
1-14In Brief
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 equipped.
See Power Mirrors on page 2‑15
and Adjustable Throttle andBrake Pedal on page 9‑27 for
more information.
Not all mirrors and adjustable
throttle 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 equipped, will move to the position
previously stored for the identified
driver.
See Memory Seats on page 3‑7 and
Vehicle Personalization (With DIC
Buttons) on page 5‑52 for more
information.
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 3‑7 and
Vehicle Personalization (With DIC
Buttons) on page 5‑52 for more
information.
Heated and Ventilated
Seats
Heated and Cooled Seat Buttons
Shown, Heated Seat Buttons
Similar
If available, the buttons are on the
front doors.
H : If available, press to cool
the seat.
I : Press to heat the
seatback only.
J : Press to heat the seat and
seatback.
Page 21
Blackplate(15,1)
GMCSierraOwnerManual-2012
In Brief1-15
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 3‑9.
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 Seat
Adjustment on page 3‑3.
Safety Belts
Refer to the following sections for
important information on how to use
safety belts properly.
.
Safety Belts on page 3‑12.
.
How to Wear Safety Belts
Properly on page 3‑13.
.
Lap-Shoulder Belt on page 3‑15.
.
Lower Anchors and Tethers for
Children (LATCH System) on
page 3‑51.
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 unless
there is an airbag off switch located
in the glove box.
If there is an airbag off switch, the
vehicle does not have a passenger
sensing system. See Airbag On-OffSwitch on page 3‑32 for more
information.
Page 22
Blackplate(16,1)
GMCSierraOwnerManual-2012
1-16In Brief
The passenger airbag status
indicator will be visible on the
overhead console when the vehicle
is started.
United States
Canada and Mexico
See Passenger Sensing System on
page 3‑35 for important information.
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, right, or left.
3. Press either (A) or (B) again to
deselect the mirror.
See Manual Mirrors on page 2‑14 or
Power Mirrors on page 2‑15.
If the vehicle has towing mirrors,
they can be adjusted for a clearer
view of the objects behind you.
Manually pull out the mirror head to
extend it for better visibility when
towing a trailer. See Trailer-TowMirrors on page 2‑15.
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.
Manual Foldaway Mirrors
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.
See Folding Mirrors on page 2‑15.
Page 23
Blackplate(17,1)
GMCSierraOwnerManual-2012
In Brief1-17
Interior Mirror
Vehicles with a manual rearview
mirror can be adjusted to see clearly
behind the vehicle. Hold the mirror
in the center to move it up or down
and side to side. To reduce
headlamp glare during nighttime
use, push the tab forward for
daytime use and pull it for
nighttime use.
Vehicles with the automatic dimming
feature will automatically reduce the
glare of headlamps from behind the
vehicle. The dimming feature comes
on and the indicator light illuminates
each time the vehicle is started.
See Automatic Dimming RearviewMirror on page 2‑17 for more
information.
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 up
or down.
3. Release the lever to lock the
wheel in place.
Do not adjust the steering wheel
while driving.
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 to your
body. Press the top of the control to
move the pedals away.
See Adjustable Throttle and BrakePedal on page 9‑27.
Page 24
Blackplate(18,1)
GMCSierraOwnerManual-2012
1-18In Brief
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.
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 6‑8.
.
Reading Lamps on page 6‑9.
.
Instrument Panel Illumination
Control on page 6‑8.
Page 25
Blackplate(19,1)
GMCSierraOwnerManual-2012
In Brief1-19
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).
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 6‑3.
.
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 26
Blackplate(20,1)
GMCSierraOwnerManual-2012
1-20In Brief
Climate Controls
These systems control the heating, cooling, and ventilation.
Climate Control System (With Air Conditioning)
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
D. Air Conditioning
E. Outside Air
F. Air Recirculation
G. Rear Window Defogger
Page 27
Blackplate(21,1)
GMCSierraOwnerManual-2012
Climate Control System (With Heater Only)
In Brief1-21
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
See Climate Control Systems (with
Air Conditioning) on page 8‑1 or
Climate Control Systems (with
Heater Only) on page 8‑4.
Page 28
Blackplate(22,1)
GMCSierraOwnerManual-2012
1-22In Brief
Dual Automatic Climate Control System
A. Driver and Passenger
Temperature Controls
B. Fan Control
C. AUTO
D. Defrost
E. Air 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 8‑5.
Transmission
Range Selection Mode
The Range Selection Mode switch,
if equipped, is located on the shift
lever.
To enable the Range Selection
feature:
1. Move the column shift lever to
the M (Manual) position. The
current range will appear next to
the M. This is the highest
attainable range with all lower
gears accessible. As an
example, when 5 (Fifth) gear is
selected, 1 (First) through
5 (Fifth) gears are available.
Page 29
Blackplate(23,1)
GMCSierraOwnerManual-2012
In Brief1-23
2. Press the plus/minus buttons,
located on the steering column
shift lever, to select the desired
range of gears for current driving
conditions. See Manual Mode onpage 9‑41.
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 9‑42.
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.
Transfer Case Buttons
The vehicle will have one of these
three styles of transfer case
controls. Use these controls to shift
into and out of the different
Four-Wheel Drive modes.
Manual Transfer Case
This transfer case shift lever is on
the floor to the right of the driver.
Page 30
Blackplate(24,1)
GMCSierraOwnerManual-2012
1-24In Brief
Electronic Transfer Case
This transfer case knob is located
next to the steering column.
Automatic Transfer Case
This transfer case knob is located
next to the steering column.
Each transfer case design offers
different drive options. The list
below describes the different drive
options that may be available.
2
m (Two-Wheel-Drive High): This
setting is used for driving in most
street and highway situations.
AUTO (Automatic Four-Wheel
Drive): This setting is ideal for use
when road surface traction
conditions are variable.
m (Four-Wheel High): Use the
4
Four-Wheel-Drive High position
when extra traction is needed, such
as on snowy or icy roads or in most
off-road situations.
N (Neutral): Shift the transfer case
to Neutral only when towing the
vehicle. See Recreational Vehicle
Towing on page 10‑96 or Trailer
Towing on page 9‑84.
n (Four-Wheel-Drive Low): This
4
setting sends maximum power to all
four wheels. You might choose
Four-Wheel-Drive Low if you are
driving off-road in deep sand, deep
mud, deep snow, and while climbing
or descending steep hills.
See Four-Wheel Drive onpage 9‑43.
Page 31
Blackplate(25,1)
GMCSierraOwnerManual-2012
In Brief1-25
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 7‑38 and Rear
Seat Audio (RSA) System on
page 7‑48 for more information.
Page 32
Blackplate(26,1)
GMCSierraOwnerManual-2012
1-26In 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
H to display HR, MIN,
MM, DD, and YYYY (hour,
minute, month, day, and year).
3. Press the softkey located under
any one of the labels to be
changed.
4. To increase or decrease the time
or date, turn
counter‐clockwise.
For detailed instructions on setting
the clock for the vehicle's specific
audio system, see Clock onpage 5‑8.
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.
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 7‑33.
®
,
Page 33
Blackplate(27,1)
GMCSierraOwnerManual-2012
In Brief1-27
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 7‑50.
®
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
device.
®
or USB
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
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.
Page 34
Blackplate(28,1)
GMCSierraOwnerManual-2012
1-28In Brief
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 9‑63.
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.
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.
Some vehicles do not have the
buttons shown, however some of
the menus can be viewed by using
the trip odometer reset stem.
Page 35
Blackplate(29,1)
GMCSierraOwnerManual-2012
In Brief1-29
3 : Press to display the
odometer, trip odometer, fuel range,
average economy, fuel used, timer,
instantaneous economy and Active
Fuel Management™ indicator, 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 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 to customize the feature
settings on your vehicle. See
Vehicle Personalization (With DIC
Buttons) on page 5‑52 for more
information.
V : Press to set or reset certain
functions and to turn off or
acknowledge messages on the DIC.
For more information, see Driver
Information Center (DIC) on
page 5‑33.
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 (WithDIC Buttons) on page 5‑52.
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 9‑68.
Page 36
Blackplate(30,1)
GMCSierraOwnerManual-2012
1-30In Brief
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 9‑66 for more information.
Power Outlets
Accessory power outlets can be
used to plug in electrical equipment,
such as a cell phone, MP3
player, etc.
The vehicle may have two
accessory power outlets located
below the climate control system,
or may have one accessory power
outlet and one cigarette lighter. The
cigarette lighter is designed to fit
only in the receptacle closest to the
driver.
There may be another accessory
power outlet in the rear cargo area.
If the vehicle has a floor console,
there is an accessory power outlet
inside the storage bin and one on
the rear of the floor console.
The accessory power outlets are
powered, even when the ignition is
in LOCK/OFF. Continuing to use
power outlets while the ignition is in
LOCK/OFF may cause the vehicle's
battery to run down.
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 5‑60.
Page 37
Blackplate(31,1)
GMCSierraOwnerManual-2012
In Brief1-31
Sunroof
Extended Cab
On vehicles with a sunroof, 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 9‑32 for more
information.
Vent: From the closed position,
press and hold the rear of the switch
to vent the sunroof. To close the
sunroof, press and hold the front of
the switch.
Open: From the vent position, the
sunroof can be fully opened either
manually or by using the
express-open feature. To open
manually, press the rear of the
switch to the first detent and hold
until the sunroof has reached the
desired position. To open using
express-open, press the rear of the
switch to the second detent and
release. The sunroof will move to
the full open position. To stop the
sunroof partway, press the switch a
second time.
Close: From the vent, or open
position, press and hold the front of
the switch to close the sunroof.
The sunroof also has a roller
sunshade that can be used to block
the rays of the sun. To open the
sunshade, press and unlatch it, and
roll it back. To close, pull it forward
and latch it into the closed position.
See Sunroof (Extended Cab) on
page 2‑20 or Sunroof (Crew Cab)
on page 2‑21.
Page 38
Blackplate(32,1)
GMCSierraOwnerManual-2012
1-32In Brief
Crew Cab
A. Open or Close
B. Vent
On vehicles with a sunroof, 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 9‑32 for more
information.
Vent: From the closed position,
press the rear of the passenger side
switch (B) to vent the sunroof.
Manual-Open/Manual-Close: To
open the sunroof, press and hold
the rear of the driver side switch (A)
until the sunroof reaches the
desired position. Press and hold the
front of the driver side switch to
close it.
Express-Open/Express-Close: To
express-open the sunroof, fully
press and release the rear of the
driver side switch (B) until the
sunroof reaches the desired
position. To express-close the
sunroof, fully press and release the
front of the driver side switch. Press
the switch again to stop it.
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
that you can pull forward to block
the rays of the sun. 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 (Extended Cab) on
page 2‑20 or Sunroof (Crew Cab)
on page 2‑21.
Page 39
Blackplate(33,1)
GMCSierraOwnerManual-2012
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 5‑47.
g on the instrument
.
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 5‑47.
.
Press and release g again to
turn on both systems.
For more information, see
StabiliTrak
®
System on page 9‑59.
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
In Brief1-33
soon as possible and inflate the
tires to the recommended pressure
shown on the Tire and Loading
Information label. See Vehicle LoadLimits on page 9‑17. 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 10‑64.
Page 40
Blackplate(34,1)
GMCSierraOwnerManual-2012
1-34In Brief
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.
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 9‑76. For all other vehicles,
use only the unleaded gasoline
described under RecommendedFuel on page 9‑74.
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.
.
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.
Page 41
Blackplate(35,1)
GMCSierraOwnerManual-2012
In Brief1-35
.
Replace the vehicle's tires with
the same TPC Spec number
molded into the tire's sidewall
near the size.
.
Follow recommended scheduled
maintenance.
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 13‑8 or
Roadside Assistance Program
(Mexico) on page 13‑10 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 13‑8 or Roadside Assistance
Program (Mexico) on page 13‑10.
With an active OnStar subscription,
an OnStar Advisor may remotely
unlock the vehicle. See OnStarOverview on page 14‑1.
Remote Keyless Entry
(RKE) System
See Radio Frequency Statement on
page 13‑22 for information
regarding Part 15 of the Federal
Communications Commission (FCC)
rules and Industry Canada
Standards RSS-GEN/210/220/310.
Page 45
Blackplate(3,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-3
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 2‑2.
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 Vehicle Start onpage 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
when
Q is pressed again within
three seconds. See Vehicle
Personalization (With DIC Buttons)
on page 5‑52 for additional
information.
Pressing
deterrent system. See Anti-theftAlarm System on page 2‑11.
Q arms the content theft‐
Page 46
Blackplate(4,1)
GMCSierraOwnerManual-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 Vehicle
Personalization (With DIC Buttons)
on page 5‑52. If enabled through the
DIC, the exterior lights may turn on.
See “Approach Lighting” under
Vehicle Personalization (With DIC
Buttons) on page 5‑52.
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
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.
L for more than
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.
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.
Page 47
Blackplate(5,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-5
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.
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 3‑9 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.
Page 48
Blackplate(6,1)
GMCSierraOwnerManual-2012
2-6Keys, Doors, and Windows
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 2‑2 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
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.
Q.
/
/ for
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.
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
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.
Q and then / are
Page 49
Blackplate(7,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-7
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.
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.
.
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
(Continued)
WARNING (Continued)
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.
Page 50
Blackplate(8,1)
GMCSierraOwnerManual-2012
2-8Keys, Doors, and Windows
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.
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 Personalization(With DIC Buttons) on page 5‑52.
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 (With DIC
Buttons) on page 5‑52 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.
Page 51
Blackplate(9,1)
GMCSierraOwnerManual-2012
Doors
Rear Doors
(Extended Cab)
Keys, Doors, and Windows2-9
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.
To open a rear access door from the
inside, first open the front door.
Then, use the handle located on the
inside of the rear access door
to open.
To open a rear access door from the
outside, first open the front door.
Then, use the handle located on the
front edge of the rear access door to
open it.
The rear access door must be
closed before the front door can
close.
Page 52
Blackplate(10,1)
GMCSierraOwnerManual-2012
2-10Keys, Doors, and Windows
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 9‑68 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 53
Blackplate(11,1)
GMCSierraOwnerManual-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 54
Blackplate(12,1)
GMCSierraOwnerManual-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 10‑47.
If the alarm does not sound or the
headlamps do not flash, see your
dealer for service.
Immobilizer
See Radio Frequency Statement on
page 13‑22 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.
Page 55
Blackplate(13,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-13
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. 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 10‑47. 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.
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.
1
Page 56
Blackplate(14,1)
GMCSierraOwnerManual-2012
2-14Keys, Doors, and Windows
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.
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.
Manual Mirrors
Vehicles with outside manual
mirrors can be adjusted by moving
the mirror up and down or left to
right to see a little of the side of the
vehicle, and have a clear view
behind the vehicle.
Using hood-mounted air deflectors
and add-on convex mirror
attachments could decrease mirror
performance.
Page 57
Blackplate(15,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-15
Trailer-Tow Mirrors
If the vehicle has towing mirrors,
they can be adjusted for a clearer
view of the objects behind you.
Manually pull out the mirror head to
extend it for better visibility when
towing a trailer.
The lower portion of the mirror is
convex. A convex mirror's surface is
curved to see more from the driver
seat. The convex mirror can be
adjusted manually to the driver
preferred position for better vision.
The mirror may have a turn signal
arrow that flashes in the direction of
the turn or lane change.
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.
Page 58
Blackplate(16,1)
GMCSierraOwnerManual-2012
2-16Keys, Doors, and Windows
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.
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 2‑17.
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.
Depending on the vehicle's features,
see “Rear Window Defogger” under
Climate Control Systems (with Air
Conditioning) on page 8‑1 or
Climate Control Systems (with
Heater Only) on page 8‑4 or Dual
Automatic Climate Control System
on page 8‑5 for more information.
Page 59
Blackplate(17,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-17
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 (WithDIC Buttons) on page 5‑52 for more
information.
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 9‑68
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 for more
information.
Cleaning the Mirror
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Page 60
Blackplate(18,1)
GMCSierraOwnerManual-2012
2-18Keys, Doors, and Windows
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.
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).
Manual Windows
Turn the hand crank on each door
to manually raise or lower the
manual windows.
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.
Page 61
Blackplate(19,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-19
Crew Cab Shown
If the vehicle has power windows,
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 is in ON/RUN or
ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is
active. See Retained AccessoryPower (RAP) on page 9‑32.
Push the switch down to lower the
window, and pull up the front of the
switch to raise the window.
Express-down Windows
Vehicles with 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): If a crew
cab or extended cab vehicle has
power windows, 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
Power Sliding Rear Window
On vehicles with a power sliding
rear window, the switch is located in
the overhead console.
Page 62
Blackplate(20,1)
GMCSierraOwnerManual-2012
2-20Keys, Doors, and Windows
The power sliding rear window
works when the ignition has been
turned to ACC/ACCESSORY or ON/
RUN, or when Retained Accessory
Power (RAP) is active. See
Retained Accessory Power (RAP)
on page 9‑32 for more information.
.
Push to open the window.
.
Pull to close the window.
The power sliding rear window
cannot be operated manually.
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 (Extended Cab)
On vehicles with a sunroof, 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 9‑32 for more
information.
Page 63
Blackplate(21,1)
GMCSierraOwnerManual-2012
Keys, Doors, and Windows2-21
Vent: From the closed position,
press and hold the rear of the switch
to vent the sunroof. To close the
sunroof, press and hold the front of
the switch.
Open: From the vent position, the
sunroof can be fully opened either
manually or by using the
express-open feature. To open
manually, press the rear of the
switch to the first detent and hold
until the sunroof has reached the
desired position. To open using
express-open, press the rear of the
switch to the second detent and
release. The sunroof will move to
the full open position. To stop the
sunroof partway, press the switch a
second time.
Close: From the vent, or open
position, press and hold the front of
the switch to close the sunroof.
The sunroof also has a roller
sunshade that can be used to block
the rays of the sun. The roller
sunshade can be manually operated
with the sunroof in an open or
closed position. To open the
sunshade, press and unlatch it, and
roll it back. To close, pull it forward
and latch it into the closed position.
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
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.
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.
Sunroof (Crew Cab)
A. Open or Close
B. Vent
On vehicles with a sunroof, the
sunroof only operates when the
ignition is in the ACC/ACCESSORY
or ON/RUN or the Retained
Accessory Power (RAP) is active.
Page 64
Blackplate(22,1)
GMCSierraOwnerManual-2012
2-22Keys, Doors, and Windows
See Retained Accessory Power
(RAP) on page 9‑32 for more
information.
Vent: From the closed position,
press the rear of the passenger side
switch (B) to vent the sunroof.
Manual-Open/Manual-Close: To
open the sunroof, press and hold
the rear of the driver side switch (A)
until the sunroof reaches the
desired position. Press and hold the
front of the driver side switch to
close it.
Express-Open/Express-Close: To
express-open the sunroof, fully
press and release the rear of the
driver side switch (B) until the
sunroof reaches the desired
position. To express-close the
sunroof, fully press and release the
front of the driver side switch. Press
the switch again to stop it.
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.
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.
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.
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 67
Blackplate(3,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-3
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
Seat Adjustment
WARNING
{
You can lose control of the
vehicle if you try to adjust a
manual driver 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 seat:
1. Lift the bar under the front edge
of the seat cushion to unlock
the seat.
2. Slide the seat to the desired
position and release the bar.
3. Try to move the seat back and
forth to be sure the seat is
locked in place.
Page 68
Blackplate(4,1)
GMCSierraOwnerManual-2012
3-4Seats and Restraints
Center Seat
If equipped, the center front
seatback doubles as an armrest and
cupholder/storage area for the driver
and passenger when the center
front seat is not used. Do not use it
as a seating position when the
seatback is folded down.
Power Seat Adjustment
To adjust a power seat, if equipped:
.
Move the seat forward or
rearward by sliding the control
forward or rearward.
.
If available, raise or lower the
front or rear part of the seat
cushion by moving the front or
rear of the control up or down.
.
If available, raise or lower the
entire seat by moving the entire
control up or down.
To adjust the seatback, see “Power
Reclining Seatbacks” under
Reclining Seatbacks on page 3‑5.
Lumbar Adjustment
Manual Lumbar
If equipped, increase or decrease
manual lumbar support by turning
the knob forward or rearward.
Page 69
Blackplate(5,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-5
Power Lumbar
To adjust the power lumbar support,
if equipped:
.
On vehicles with two-way
lumbar, press and hold the top
or bottom of the control to
increase or decrease lumbar
support.
.
On vehicles with four-way
lumbar, press and hold the front
or rear of the control to increase
or decrease lumbar support. To
raise or lower the height of the
support, press and hold the top
or bottom of the control.
Reclining Seatbacks
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.
(Continued)
WARNING (Continued)
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.
Do not have a seatback reclined if
the vehicle is moving.
Page 70
Blackplate(6,1)
GMCSierraOwnerManual-2012
3-6Seats and Restraints
Manual Reclining Seatbacks
WARNING
{
You can lose control of the
vehicle if you try to adjust a
manual driver 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.
WARNING
{
If either seatback is not locked, it
could move forward in a sudden
stop or crash. That could cause
injury to the person sitting there.
Always push and pull on the
seatbacks to be sure they are
locked.
To return the seatback to the upright
position:
1. Lift the lever fully without
applying pressure to the
seatback, and the seatback will
return to the upright position.
2. Push and pull on the seatback to
make sure it is locked.
To adjust a manual seatback:
1. Lift the lever.
The seatback will automatically
fold forward.
2. To recline, move the seatback
rearward to the desired position,
then release the lever to lock the
seatback in place.
3. Push and pull on the seatback to
make sure it is locked.
Page 71
Blackplate(7,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-7
Power Reclining Seatbacks
To recline a power seatback,
if equipped:
.
Tilt the top of the control
rearward to recline.
.
Tilt the top of the control forward
to raise.
Memory Seats
On vehicles with the memory
feature, 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 equipped.
Storing Memory Positions
To save into memory:
1. Adjust the driver seat, seatback
recliner, both outside mirrors,
and the throttle and brake
pedals, if equipped.
See Power Mirrors on page 2‑15
and Adjustable Throttle andBrake Pedal on page 9‑27 for
more information.
Not all mirrors and adjustable
throttle 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 72
Blackplate(8,1)
GMCSierraOwnerManual-2012
3-8Seats and Restraints
Memory Remote Recall
The memory feature can recall the
driver seat, outside mirrors, and
pedals, if equipped, 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, if equipped, 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 Personalization(With DIC Buttons) on page 5‑52 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 (WithDIC Buttons) on page 5‑52 for more
information.
B again until the
Page 73
Blackplate(9,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-9
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.
Heated and Cooled Seat Buttons
Shown, Heated Seat Buttons
Similar
If available, the buttons are on the
front doors.
H (Cooled Seat): If available,
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.
On vehicles with heated seats, the
heated seats are canceled
10 seconds after the ignition is
turned off.
On vehicles with heated and cooled
seats, 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 74
Blackplate(10,1)
GMCSierraOwnerManual-2012
3-10Seats 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 (Extended
Cab Full Bench)
Folding the Rear Seat
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.
To fold the seat:
1. Pull up on the front of the seat
cushion while pulling down on
the release strap under the seat
cushion.
2. Pull the seat cushion up until it
latches with the seatback.
3. Pull forward on the seat cushion
to make sure it is locked in
place.
Page 75
Blackplate(11,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-11
To unfold the seat:
1. Push the seat cushion rearward
while pulling the release strap
under the seat cushion. Pull the
seat cushion down until it
latches.
2. Pull up on the seat cushion to
make sure it is locked in place.
Make sure the safety belts are
not twisted or caught in the seat
cushion.
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.
Rear Seats (All Split
Bench and Hybrid Full
Bench)
Folding Rear Seat
Either side of the rear seat can 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.
Make sure the safety belts are not
twisted or caught in the seat
cushion.
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 76
Blackplate(12,1)
GMCSierraOwnerManual-2012
3-12Seats and Restraints
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. 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
(Continued)
WARNING (Continued)
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.
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 5‑19 for additional information.
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!
Page 77
Blackplate(13,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-13
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.
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 3‑43 or Infants
and Young Children on page 3‑45.
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.
Page 78
Blackplate(14,1)
GMCSierraOwnerManual-2012
3-14Seats and Restraints
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.
.
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 79
Blackplate(15,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-15
Lap-Shoulder Belt
If the vehicle is a regular cab, then
all seating positions in the vehicle
have a lap-shoulder belt. If the
vehicle is a crew or extended cab,
then all seating positions in the
vehicle have a lap-shoulder belt
except for the center front
passenger position (if equipped),
which has a lap belt. See Lap Belt
(Crew and Extended Cab) on
page 3‑20 for more information.
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 3‑35
for more information.
If the belt stops before it reaches
the buckle, when using the
lap-shoulder belt in a rear center
seating position of a crew-cab,
tilt the latch plate and keep
pulling the safety belt until it can
be buckled.
Page 80
Blackplate(16,1)
GMCSierraOwnerManual-2012
3-16Seats and Restraints
4. If equipped with a shoulder belt
height adjuster, move it to the
height that is right for you. See
“Shoulder Belt Height Adjuster”
later in this section.
3. Push the latch plate into the
buckle until it clicks.
Pull up on the latch plate to
make sure it is secure. If the belt
is not long enough, see SafetyBelt Extender on page 3‑21.
If the latch plate will not go fully
into the buckle, check if the
correct buckle is being used.
Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary.
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
safety belt and the vehicle.
Page 81
Blackplate(17,1)
GMCSierraOwnerManual-2012
Shoulder Belt Height Adjuster
The vehicle has a shoulder belt
height adjuster for the driver and
right front passenger.
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 3‑13.
Regular and Crew Cab
To move the adjuster down for the
regular and crew cabs, squeeze the
buttons (A) on the sides of the
height adjuster and move the height
adjuster to the desired position.
Seats and Restraints3-17
Extended Cab
On the extended cab, push down on
the release button (A) and move the
height adjuster to the desired
position.
You can move the adjuster up just
by pushing up on the shoulder belt
guide.
After you move the adjuster to
where you want it, try to move it
down, without squeezing the buttons
for the regular and crew cabs,
or without pushing the release
button for extended cabs, to make
sure it has locked into position.
Page 82
Blackplate(18,1)
GMCSierraOwnerManual-2012
3-18Seats and Restraints
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 your
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 3‑22.
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.
Here is how to install a comfort
guide to the shoulder belt:
1. Remove the guide from its
storage clip on the interior body.
2. Place the guide over the belt
and insert the two edges of the
belt into the slots of the guide.
Page 83
Blackplate(19,1)
GMCSierraOwnerManual-2012
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. 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.
Seats and Restraints3-19
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 onto the storage clip.
Page 84
Blackplate(20,1)
GMCSierraOwnerManual-2012
3-20Seats and Restraints
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 (Crew and
Extended Cab)
This section is only for the lap belt.
To learn how to wear a lap-shoulder
belt, see Lap-Shoulder Belt onpage 3‑15.
Your 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.
Page 85
Blackplate(21,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-21
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 3‑21.
Make sure the release button on the
buckle is positioned so you would
be able to unbuckle the safety belt
quickly if necessary.
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 5‑19 for more
information.
Keep safety belts clean and dry.
See Safety Belt Care on page 3‑22.
Page 86
Blackplate(22,1)
GMCSierraOwnerManual-2012
3-22Seats and Restraints
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.
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 5‑20.
Page 87
Blackplate(23,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-23
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.
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 3‑27.
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.
Page 88
Blackplate(24,1)
GMCSierraOwnerManual-2012
3-24Seats and Restraints
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.
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 3‑43 or Infants
and Young Children on
page 3‑45.
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 5‑20 for
more information.
Page 89
Blackplate(25,1)
GMCSierraOwnerManual-2012
Where Are the Airbags?
Seats and Restraints3-25
The driver airbag is in the middle of
the steering wheel.
The right front passenger 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.
Page 90
Blackplate(26,1)
GMCSierraOwnerManual-2012
3-26Seats and Restraints
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
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.
(Continued)
WARNING (Continued)
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.
Page 91
Blackplate(27,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-27
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.
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 9‑17 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.
Page 92
Blackplate(28,1)
GMCSierraOwnerManual-2012
3-28Seats and Restraints
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 seat position sensors
which enable the sensing system to
monitor the position of the driver
seat (all models), and on crew cab
and extended cab models the right
front passenger seat on 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 or may not have
seat‐mounted side impact and
roof-rail airbags. See Airbag Systemon page 3‑23. 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. In a
rollover event, roof-rail airbag
deployment is determined by the
direction of the roll.
Page 93
Blackplate(29,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-29
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 3‑27 for more information.
Airbags should never be regarded
as anything more than a supplement
to safety belts.
Page 94
Blackplate(30,1)
GMCSierraOwnerManual-2012
3-30Seats and Restraints
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 3‑29.
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.
(Continued)
WARNING (Continued)
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.
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.
Page 95
Blackplate(31,1)
GMCSierraOwnerManual-2012
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. 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
other parts. The service manual
for your vehicle covers the need
to replace other parts.
Seats and Restraints3-31
.
The vehicle has a crash sensing
and diagnostic module which
records information after a
crash. See Vehicle Data
Recording and Privacy on
page 13‑20 and Event Data
Recorders on page 13‑21.
.
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.
Page 96
Blackplate(32,1)
GMCSierraOwnerManual-2012
3-32Seats and Restraints
Airbag On-Off Switch
If one of the switches pictured in the
following illustrations is located in
the glove box, the vehicle has an
airbag on-off switch that you can
use to manually turn on or off the
right front passenger airbag.
United States
Canada and Mexico
If the vehicle does not have an
airbag off switch, it may have a
passenger sensing system. See
Passenger Sensing System on
page 3‑35.
This switch should only be turned to
the off position if the person in the
right front passenger position is a
member of a passenger risk group
identified by the national
government as follows:
Infant. An infant (less than 1 year
old) must ride in the front seat
because:
.
My vehicle has no rear seat;
.
My vehicle has a rear seat too
small to accommodate a
rear-facing infant seat; or
.
The infant has a medical
condition which, according to the
infant's physician, makes it
necessary for the infant to ride in
the front seat so that the driver
can constantly monitor the
child's condition.
Page 97
Blackplate(33,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-33
Child age 1 to 12. A child
age 1 to 12 must ride in the front
seat because:
.
My vehicle has no rear seat;
.
Although children ages 1 to 12
ride in the rear seat(s) whenever
possible, children ages 1 to 12
sometimes must ride in the front
because no space is available in
the rear seat(s) of my vehicle; or
.
The child has a medical
condition which, according to the
child's physician, makes it
necessary for the child to ride in
the front seat so that the driver
can constantly monitor the
child's condition.
Medical Condition. A passenger
has a medical condition which,
according to his or her physician:
.
Causes the passenger airbag to
pose a special risk for the
passenger; and
.
Makes the potential harm from
the passenger airbag in a crash
greater than the potential harm
from turning off the airbag and
allowing the passenger, even if
belted, to hit the instrument
panel or windshield in a crash.
WARNING
{
If the right front passenger airbag
is turned off for a person who is
not in a risk group identified by
the national government, that
person will not have the extra
protection of an airbag. In a
crash, the airbag will not be able
to inflate and help protect the
person sitting there. Do not turn
off the passenger airbag unless
the person sitting there is in a risk
group.
United States
Canada and Mexico
Page 98
Blackplate(34,1)
GMCSierraOwnerManual-2012
3-34Seats and Restraints
To turn off the right front passenger
airbag, insert the ignition key into
the switch, push in, and move the
switch to the off position.
The word OFF or the off symbol will
come on in the passenger airbag
status indicator located in the
overhead console to let you know
that the right front passenger airbag
is off, after the system check is
completed. The airbag off light will
come on and stay on to let you
know that the right front passenger's
airbag is off. See Airbag On-OffLight on page 5‑21.
WARNING
{
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong
with the airbag system. For
example, the right front
passenger airbag could inflate
even though the airbag on-off
switch is turned off.
To help avoid injury to yourself or
others, have the vehicle serviced
right away. See Airbag ReadinessLight on page 5‑20 for more
information, including important
safety information.
United States
Canada and Mexico
Page 99
Blackplate(35,1)
GMCSierraOwnerManual-2012
Seats and Restraints3-35
To turn the right front passenger
airbag on again, insert the ignition
key into the switch, push in, and
move the switch to the on position.
The right front passenger frontal
airbag is now enabled (may inflate).
See Airbag On-Off Light onpage 5‑21 for more information.
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,
unless there is an airbag off switch
located in the glove box. If there is
an airbag off switch, the vehicle
does not have a passenger sensing
system. See Airbag On-Off Switchon page 3‑32 for more information.
The passenger airbag status
indicator will be 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
symbol for on and off, will be visible
during the system check. If you are
using remote start to start the
vehicle from a distance, if equipped,
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 AirbagStatus Indicator on page 5‑23.
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.
Page 100
Blackplate(36,1)
GMCSierraOwnerManual-2012
3-36Seats and Restraints
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
injured or killed if the right front
(Continued)
WARNING (Continued)
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.
If the vehicle does not have a rear
seat that will accommodate a
rear-facing child restraint, a
rear-facing child restraint should not
be installed in the vehicle, even if
the airbag is off.
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.
.
Or, if 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 to
remind you that the airbag is off.
See Passenger Airbag StatusIndicator on page 5‑23.
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