rear view mirror GMC SIERRA 1500 2012 Owners Manual

Black plate (18,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
1-18 In Brief
SeePower Mirrors on page 2‑15.
Keep the selector switch in the
center position when not adjusting
either outside mirror.
Manual Mirrors
If the vehicle has manual mirrors,
they 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.
Manual Folding Mirrors
If the vehicle has manual folding
mirrors, push the mirror toward the
vehicle. Push the mirror outward, to
return to its original position.
Manually fold the mirrors inward
to prevent damage when going
through an automatic car wash.
See Folding Mirrors on page 2‑16. 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. See
Trailer-Tow
Mirrors on page 2‑15.
Heated Mirrors
For vehicle with heated mirrors:
Press
1to 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
mirrors is not heated.
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 orDual
Automatic Climate Control System
on page 8‑5 for more information. Park Tilt Mirrors
If the vehicle has the memory
package, the exterior mirrors tilt
to a preselected position when the
vehicle is in R (Reverse). This
feature lets the driver view the curb
when parallel parking. The mirrors
return to the original position
when the vehicle is shifted out of
R (Reverse), or the ignition is turned
off or to OFF/LOCK.
This feature can be programed
through the Driver Information
Center (DIC). See
Vehicle
Personalization (With DIC Buttons)
on page 5‑48 for more information.
Interior Mirror
Adjustment
Hold the rearview mirror in the
center and move it to view the area
behind the vehicle.

Black plate (19,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
In Brief 1-19
Manual Rearview Mirror
For vehicles with a manual rearview
mirror, push the tab forward for
daytime use and pull it for nighttime
use to avoid glare from the
headlamps from behind. See
Manual Rearview Mirror on
page 2‑18.
Automatic Dimming Rearview
Mirror
For vehicles with an automatic
dimming rearview mirror. The mirror
will automatically reduce the glare
from the headlamps from behind.
The dimming feature comes on
when the vehicle is started.
SeeAutomatic Dimming Rearview
Mirror on page 2‑18.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 Brake
Pedal on page 9‑25.

Black plate (31,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
In Brief 1-31
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 5‑48 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 5‑30.
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 (With
DIC Buttons) on page 5‑48.
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 Rear
Vision Camera (RVC) on page 9‑62.
Ultrasonic Parking Assist
If available, the 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.

Black plate (1,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Keys, Doors, and Windows 2-1
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . 2-2
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . 2-3
Remote Vehicle Start . . . . . . . . . 2-5
Door Locks . . . . . . . . . . . . . . . . . . . 2-7
Power Door Locks . . . . . . . . . . . . 2-8
Delayed Locking . . . . . . . . . . . . . . 2-8
Automatic Door Locks . . . . . . . . . 2-8
Lockout Protection . . . . . . . . . . . . 2-9
Safety Locks . . . . . . . . . . . . . . . . . . 2-9
Doors
Rear Doors (Extended Cab) . . . . . . . . . . . . . . 2-9
Tailgate . . . . . . . . . . . . . . . . . . . . . . 2-10
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . 2-11
Anti-theft Alarm System . . . . . . 2-11
Immobilizer . . . . . . . . . . . . . . . . . . 2-12
Immobilizer Operation . . . . . . . 2-13
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . 2-14
Manual Mirrors . . . . . . . . . . . . . . . 2-14
Trailer-Tow Mirrors . . . . . . . . . . . 2-15
Power Mirrors . . . . . . . . . . . . . . . . 2-15
Folding Mirrors . . . . . . . . . . . . . . . 2-16
Heated Mirrors . . . . . . . . . . . . . . . 2-17
Park Tilt Mirrors . . . . . . . . . . . . . . 2-17
Interior Mirrors
Manual Rearview Mirror . . . . . . 2-18
Automatic Dimming Rearview Mirror . . . . . . . . . . . . . . . . . . . . . . . 2-18
Windows
Windows . . . . . . . . . . . . . . . . . . . . . 2-19
Manual Windows . . . . . . . . . . . . 2-19
Power Windows . . . . . . . . . . . . . 2-20
Rear Windows . . . . . . . . . . . . . . . 2-21
Sun Visors . . . . . . . . . . . . . . . . . . . 2-21
Roof
Sunroof (Extended Cab) . . . . . 2-22
Sunroof (Crew Cab) . . . . . . . . . 2-23

Black plate (17,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Keys, Doors, and Windows 2-17
Manual Folding
If equipped with manual folding
mirrors, push the mirror toward the
vehicle. Push the mirror outward, to
return to its original position.
Manually fold the mirrors inward to
prevent damage when going
through an automatic car wash.
Automatic Dimming
If equipped with an automatic
dimming mirror, the driver outside
mirror automatically dimes for the
glare of the headlamps from behind.
This feature is controlled by the on
and off setting on the inside
rearview mirror.
SeeAutomatic Dimming Rearview
Mirror on page 2‑18.
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 orDual
Automatic Climate Control System
on page 8‑5 for more information.
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).
SeeVehicle Personalization (With
DIC Buttons) on page 5‑48 for more
information.

Black plate (18,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
2-18 Keys, Doors, and Windows
Interior Mirrors
Manual Rearview Mirror
To adjust the inside rearview mirror,
hold the rearview mirror in the
center and move it to view the area
behind the vehicle.
For vehicles with a manual rearview
mirror, push the tab forward for
daytime use and pull it for nighttime
use to avoid glare from the
headlamps from behind.
Vehicles with OnStar
®have three
control buttons at the bottom of the
mirror. See a dealer for more
information about OnStar and how
to subscribe to it. See OnStar
Overview on page 14‑1.
Automatic Dimming
Rearview Mirror
The vehicle may have an automatic
dimming inside rearview mirror.
To adjust the inside rearview mirror,
hold the rearview mirror in the
center and move it to view the area
behind the vehicle.
The automatic dimming rearview
mirror will automatically reduce the
glare from the headlamps from
behind. The dimming feature comes
on when the vehicle is started.
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 9‑62
for more information. If the vehicle has a RVC,
the
Obutton 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 a dealer for
more information about OnStar and
how to subscribe to it. See OnStar
Overview on page 14‑1.
Cleaning the Mirror
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.

Black plate (9,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Climate Controls 8-9
This mode recirculates and helps
to quickly cool the air inside the
vehicle. It can be used to help
prevent outside air and odors from
entering the vehicle.
The recirculation mode cannot be
used with floor, defog, or defrost
modes. If recirculation is selected
with one of those modes, the
indicator light flashes three times
and then turns off. The air
conditioning compressor also comes
on when this mode is activated.
While in recirculation mode, the
windows may fog when the weather
is cold and damp. To clear the fog,
select either the defog or defrost
mode and increase the fan speed.
The recirculation mode can be
turned off by pressing the outside
air button, or by turning off the
ignition.
;(Outside Air):Press to turn the
outside air mode on. An indicator
light on the button comes on to
show that outside is on. When
selected, air from outside the vehicle circulates throughout the
vehicle. The recirculation mode
cannot be used with the outside
air mode.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
1(Rear Window Defogger):
For
vehicles with this feature, press
to turn the defogger on or off.
It automatically turns off several
minutes after it has been activated.
The defogger can also be turned off
by turning the engine off. Do not
drive the vehicle until all windows
are clear.
Notice: Do not use a razor blade
or sharp object to clear the inside
rear window. Do not adhere
anything to the defogger grid
lines in the rear glass. These
actions may damage the rear
defogger. Repairs would not be
covered by your warranty. Heated Mirror:
For vehicles with
heated outside rearview mirrors, the
mirrors heat to help clear fog or frost
from the surface of the mirror when
the rear window defog button is
pressed. See Power Mirrors on
page 2‑15.
Sensors
The solar sensor, located in the
defrost grille in the middle of the
instrument panel, monitors the solar
heat. Do not cover the solar sensor
or the system will not work properly.

Black plate (12,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
9-12 Driving and Operating
.Have good tires with proper
tread depth. SeeTires on
page 10‑50.
.Turn off cruise control.
Highway Hypnosis
Always be alert and pay attention to
your surroundings while driving.
If you become tired or sleepy, find
a safe place to park the vehicle
and rest.
Other driving tips include:
.Keep the vehicle well ventilated.
.Keep the interior
temperature cool.
.Keep your eyes moving —scan
the road ahead and to the sides.
.Check the rearview mirror and
vehicle instruments often.
Hill and Mountain Roads
Driving on steep hills or through
mountains is different than driving
on flat or rolling terrain. Tips for
driving in these conditions include:
.Keep the vehicle serviced and in
good shape.
.Check all fluid levels and brakes,
tires, cooling system, and
transmission.
.Shift to a lower gear when going
down steep or long hills.
{WARNING
If you do not shift down, the
brakes could get so hot that they
would not work well. You would
then have poor braking or even
none going down a hill. You could
crash. Shift down to let the engine
assist the brakes on a steep
downhill slope.
{WARNING
Coasting downhill in N (Neutral)
or with the ignition off is
dangerous. The brakes will have
to do all the work of slowing down
and they could get so hot that
they would not work well. You
would then have poor braking or
even none going down a hill. You
could crash. Always have the
engine running and the vehicle in
gear when going downhill.

Black plate (63,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Driving and Operating 9-63
WARNING (Continued)
using only the RVC screen, such
as during longer, higher speed
backing maneuvers, or where
there could be cross-traffic.
Perceived distances may be
different from actual distances.
Failure to use proper care before
backing may result in injury,
death, or vehicle damage. Always
check behind and around the
vehicle before backing.
Vehicles without Navigation
System
The RVC system displays a view of
the area behind the vehicle. When
the vehicle is on and shifted into
R (Reverse) the video image
appears on the inside rearview
mirror. The video image disappears
after the vehicle is shifted out of
R (Reverse).Turning the RVC System On or Off
To turn off the RVC system, press
and hold
z, located on the
inside rearview mirror, until the left
indicator light turns off. The RVC
display is now disabled.
To turn the RVC system on, press
and hold
zuntil the left indicator
light comes on. The RVC system
display will appear in the mirror.
Vehicles with Navigation
System
The RVC system is designed to
help the driver when backing up by
displaying a view of the area behind
the vehicle. When the vehicle is
shifted into R (Reverse), the video
image appears on the navigation
screen. After a delay, the navigation
screen displays the last screen after
the vehicle is shifted out of
R (Reverse). Turning the RVC System On or Off
To turn the RVC system on or off:
1. Shift into P (Park).
2. Press MENU to enter the
configure menu options. Turn
the Multifunction knob until the
Display feature is highlighted
and press the Multifunction
knob. Or press the Display
screen button
3. Select the Rear Camera Options screen button. The Rear Camera
Options screen displays.
4. Select the Video screen button.When the Video screen button
is highlighted the RVC
system is on.

Black plate (67,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Driving and Operating 9-67
Reverse this procedure to reinstall
the RVC and make sure the
grommet and connection are
secure.
When the System Does Not
Seem To Work Properly
The RVC system might not work
properly or display a clear image if:
.The RVC is turned off. See
“Turning the RVC System On or
Off”earlier in this section.
.It is dark.
.The sun or the beam of
headlamps is shining directly
into the camera lens.
.Ice, snow, mud, or anything else
builds up on the camera lens.
Clean the lens, rinse it with
water, and wipe it with a soft
cloth.
.The back of the vehicle is in
an accident, the position and
mounting angle of the camera
can change or the camera can
be affected. Be sure to have the
camera and its position and
mounting angle checked at your
dealer.
The RVC system display in the
rearview mirror may turn off or not
appear as expected due to one of
the following conditions. If this
occurs the left indicator light on the
mirror will flash.
.A slow flash may indicate a loss
of video signal, or no video
signal present during the reverse
cycle.
.A fast flash may indicate that
the display has been on for
the maximum allowable time
during a reverse cycle, or the
display has reached an Over
Temperature limit. The fast flash conditions are
used to protect the video
device from high temperature
conditions. Once conditions
return to normal the device will
reset and the green indicator will
stop flashing.
During any of these fault conditions,
the display will be blank and the
indicator will flash while the vehicle
is in R (Reverse) or until the
conditions return to normal.
Press and hold
zwhen the left
indicator light is flashing to turn off
the video display along with the left
indicator light.