2012 GMC SIERRA 1500 display

Black plate (57,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Driving and Operating 9-57
It is recommended to leave the
system on for normal driving
conditions, but it may be necessary
to turn the system off if the vehicle
is stuck in sand, mud, ice or snow,
and you want to“rock”the vehicle to
attempt to free it. It may also be
necessary to turn off the system
when driving in extreme off-road
conditions where high wheel spin is
required. See If the Vehicle Is Stuck
on page 9‑15.
When the transfer case is in 4LO,
the stability system is automatically
disabled, the StabiliTrak light comes
on, and the appropriate message
will appear on the DIC. Both
traction control and StabiliTrak
are automatically disabled in this
condition.
Traction Control Operation
The TCS is part of the StabiliTrak
system. Traction control limits wheel
spin by reducing engine power
to the wheels (engine speed
management) and by applying brakes to each individual wheel
(brake-traction control) as
necessary.
The TCS is enabled automatically
when the vehicle is started. It will
activate and the StabiliTrak light
will flash if it senses that any of the
wheels are spinning or beginning to
lose traction while driving. If traction
control is turned off, only the
brake-traction control portion of
traction control will work. The
engine speed management will be
disabled. In this mode, engine
power is not reduced automatically
and the driven wheels can spin
more freely. This can cause the
brake-traction control to activate
constantly.
Notice:
If the wheel(s) of one axle
is allowed to spin excessively
while the StabiliTrak
®, ABS, brake
warning lights, and any relevant
DIC messages are displayed, the
transfer case could be damaged.
The repairs would not be covered
by the vehicle warranty. Reduce
engine power and do not spin the wheel(s) excessively while these
lights and messages are
displayed.
The TCS may activate on dry or
rough roads or under conditions
such as heavy acceleration while
turning or abrupt upshifts/downshifts
of the transmission. When this
happens, a reduction in acceleration
may be noticed, or a noise or
vibration may be heard. This is
normal.
If cruise control is being used when
the system activates, the StabiliTrak
light will flash and cruise control will
automatically disengage. Cruise
control may be reengaged when
road conditions allow. See
Cruise
Control on page 9‑58.
StabiliTrak may also turn off
automatically if it determines that a
problem exists with the system.
If the problem does not clear itself
after restarting the vehicle, see your
dealer for service.

Black plate (61,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Driving and Operating 9-61
Object Detection
Systems
Ultrasonic Parking Assist
If available, the Ultrasonic Rear
Parking Assist (URPA) system
assists the driver with parking
and avoiding objects while in
R (Reverse). URPA operates at
speeds less than 8 km/h (5 mph).
The sensors on the rear bumper
detect objects up to 2.5 m (8 ft)
behind the vehicle, and at least
25 cm (10 in) off the ground.
{WARNING
The URPA system does not
detect pedestrians, bicyclists,
animals, or objects below the
bumper or that are too close or
too far from the vehicle. To
prevent injury, death, or vehicle
damage, even with URPA, always(Continued)
WARNING (Continued)
check the area around the vehicle
and check all mirrors before
backing.
How the System Works
URPA comes on automatically
when the shift lever is moved into
R (Reverse). A single tone sounds
to indicate the system is working.
URPA operates only at speeds less
than 8 km/h (5 mph).
An obstacle is indicated by audible
beeps. The interval between the
beeps becomes shorter as the
vehicle gets closer to the obstacle.
When the distance is less than
30 cm (12 in) the beeping is a
continuous tone for five seconds.
To be detected, objects must be at
least 25 cm (10 in) off the ground
and below tailgate level. Objects
must also be within 2.5 m (8 ft) from the rear bumper. This distance may
be less during warmer or humid
weather.
Turning the System On and Off
The URPA system can be turned
on and off using the rear park aid
disable button located next to the
radio.
The indicator light comes on when
the system is disabled and turns off
when the system is on.
When the system is off, PARK
ASSIST OFF displays on the Driver
Information Center (DIC). The
message disappears after a short
period of time.

Black plate (62,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
9-62 Driving and Operating
URPA defaults to the on setting
each time the vehicle is started.
Notice:If you use URPA while the
tailgate is lowered, it may not
detect an object behind your
vehicle, and you might back into
the object and damage your
vehicle. Always verify the tailgate
is closed when using URPA or
turn off URPA when driving with
the tailgate lowered.
When the System Does Not
Seem to Work Properly
The following messages may be
displayed on the DIC:
SERVICE PARK ASSIST: If this
message occurs, take the vehicle to
your dealer to repair the system. PARK ASST BLOCKED SEE
OWNERS MANUAL:
This
message can occur under the
following conditions:
.The ultrasonic sensors are not
clean. Keep the vehicle's rear
bumper free of mud, dirt, snow,
ice, and slush. For cleaning
instructions, see Exterior Care
on page 10‑98.
.The park assist sensors are
covered by frost or ice. Frost or
ice can form around and behind
the sensors and may not always
be seen; this can occur after
washing the vehicle in cold
weather. The message may not
clear until the frost or ice has
melted.
.A trailer was attached to the
vehicle, or an object was
hanging out of the tailgate during
the last drive cycle. Once the
object is removed and the
tailgate is raised, URPA will
return to normal operation.
.A tow bar is attached to the
vehicle.
.The bumper is damaged. Take
the vehicle to your dealer to
repair the system.
.Other conditions, such as
vibrations from a jackhammer or
the compression of air brakes on
a very large truck, are affecting
system performance.
Rear Vision
Camera (RVC)
If available, the Rear Vision Camera
(RVC) system displays part of the
scene behind the vehicle.
{WARNING
The RVC system does not display
pedestrians, bicyclists, animals,
or any other object located
outside the camera's field of view,
below the bumper, or under the
vehicle. Do not back the vehicle
(Continued)

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 (64,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
9-64 Driving and Operating
The delay after shifting out of
R (Reverse) is approximately
10 seconds. The delay can be
canceled by performing one of the
following:
.Pressing a hard key on the
navigation system.
.Shifting into P (Park).
.Reaching a vehicle speed of
8 km/h (5 mph).
Adjusting the Brightness and
Contrast of the Screen
To adjust the brightness and
contrast of the screen, press the
MENU button while the RVC image
is on the display. Any adjustments
made will only affect the RVC
screen.
](Brightness): Touch the + (plus)
or –(minus) screen buttons to
increase or decrease the brightness
of the screen.
_(Contrast): Touch the + (plus)
or –(minus) screen buttons to
increase or decrease the contrast of
the screen.
Symbols
The navigation system may have a
feature that allows for viewing
parking assist symbols on the
navigation screen while using the
RVC. The Ultrasonic Rear Park
Assist (URPA) system must not be
disabled to use the caution symbols.
If URPA has been disabled and the
symbols have been turned on,
the Rear Parking Assist Symbols
Unavailable error message may
display. See Ultrasonic Parking
Assist on page 9‑61.
The symbols appear near objects
detected by the URPA system. The
symbol may cover the object when
viewing the navigation screen.
To turn the symbols on or off:
1. Make sure that URPA has not been disabled.
2. Shift into P (Park). 3. 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
4. Select the Rear Camera Options screen button. The Rear Camera
Options screen displays.
5. Touch the Symbols screen button. The screen button will
be highlighted when on.
Guidelines
The RVC system has a guideline
overlay that can help the driver align
the vehicle when backing into a
parking spot.
If the vehicle has dual rear wheels,
this feature will not be available.
To turn the guidelines on or off:
1. Make sure that URPA has not been disabled.
2. Shift into P (Park).

Black plate (65,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Driving and Operating 9-65
3. Press MENU to enter theconfigure menu options. Turn
the Multifunction knob until the
Display feature is highlighted
and press the Multifunction
knob. Or press the Display
screen button
4. Select the Rear Camera Options screen button. The Rear Camera
Options screen displays.
5. Touch the Guidelines screen button. The screen button will be
highlighted when on.RVC Location
The camera is located in the bezel
for the tailgate handle.
This shows the field of view that the
camera provides.
A. View displayed by the camera
A. View displayed by the camera
B. Corners of the rear bumper

Black plate (66,1)GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
9-66 Driving and Operating
Displayed images may be further or
closer than they appear. The area
displayed is limited and objects
which are close to either corner of
the bumper or under the bumper do
not display.
Disconnecting the RVC
The rear vision camera must be
disconnected if the tailgate needs to
be removed.
To disconnect the camera:
1. Remove the license plate.
2. Disconnect the cameraconnectors from the chassis
harness, located behind the
license plate, by pressing on the
release tab on each connector.
A. Chassis harness connector
B. Release tab
C. Camera connector
3. Plug the two exposed chassis harness connectors together to
prevent contamination.A. Chassis harness connector
B. Release tab
4. Feed the wiring harness through the pickup box, then plug the
camera connectors together to
prevent contamination.
5. Remove the tailgate. See Tailgate on page 2‑10 for more
information.
6. Reinstall the license plate.

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.