2009 GMC SIERRA light

Mirrors
Manual Rearview Mirror
Hold the inside rearview mirror in the center to move it
for a clearer view behind your vehicle. Adjust the mirror to
avoid glare from the headlamps behind you. Push the tab
forward for daytime use and pull it for nighttime use.
Automatic Dimming Rearview Mirror
The vehicle may have an automatic dimming inside
rearview mirror.
Vehicles with OnStar
®have three additional control
buttons for the OnStar®system. See your dealer/retailer
for more information about OnStar®and how to subscribe
to it. SeeOnStar®System on page 2-71for more
information about the services OnStar®provides.
O(On/Off):Press to turn the dimming feature
on or off.
The vehicle may also have a Rear Vision
Camera (RVC). SeeRear Vision Camera (RVC)
on page 2-65for more information.
If the vehicle has RVC, the
O(On/Off) button for
turning the automatic dimming feature on or off will
not be available.
Automatic Dimming Mirror Operation
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.
Cleaning the Mirror
Do not spray glass cleaner directly on the mirror.
Use a soft towel dampened with water.
2-57

Object Detection Systems
Ultrasonic Rear Parking
Assist (URPA)
For vehicles with the Ultrasonic Rear Parking Assist
(URPA) system, it operates at speeds less than 5 mph
(8 km/h), and assists the driver with parking and avoiding
objects while in R (Reverse). The sensors on the rear
bumper are used to detect the distance to an object up to
8 feet (2.5 m) behind the vehicle, and at least 10 inches
(25.4 cm) off the ground.
{CAUTION:
The Ultrasonic Rear Parking Assist (URPA)
system does not replace driver vision. It cannot
detect:
objects that are below the bumper, underneath
the vehicle, or if they are too close or far from
the vehicle
children, pedestrians, bicyclists, or pets.
CAUTION: (Continued)
CAUTION: (Continued)
If you do not use proper care before and while
backing; vehicle damage, injury, or death could
occur. Even with URPA, always check behind the
vehicle before backing up. While backing, be sure
to look for objects and check the vehicle’s mirrors.
The display is located near
the passenger side rear
window and can be seen
by looking over your right
shoulder.
URPA uses three color-coded lights to provide distance
and system information.
2-62

How the System Works
URPA comes on automatically when the shift lever
is moved into R (Reverse). The rear display briey
illuminates to indicate the system is working.
URPA operates only at speeds less than 5 mph
(8 km/h). If the vehicle is above this speed, the red light
on the rear display will ash.
To be detected, objects must be at least 10 inches
(25.4 cm) off the ground and below tailgate level.
Objects must also be within 8 feet (2.5 m) from the
rear bumper. This distance may be less during warmer
or humid weather.
A single beep will sound the rst time an object is
detected between 40 inches (1 m) and 8 feet (2.5 m)
away. Beeping will occur continuously when the vehicle
is at 23 inches (0.6 m) or closer to an object.The following describes what will occur with the URPA
display as the vehicle gets closer to a detected object:
Description English Metric
amber light 8 ft 2.5 m
amber/amber lights 40 in 1.0 m
amber/amber/red lights
and continuous beeping
for ve seconds23 in 0.6 m
amber/amber/red lights
ashing and continuous
beeping for ve seconds1 ft 0.3 m
The system can be
disabled by pressing the
rear park aid disable button
located next to the radio.
2-63

The indicator light will come on and PARK ASSIST
OFF displays on the Driver Information Center (DIC)
to indicate that URPA is off, seeDIC Warnings and
Messages on page 3-66for information about clearing
the message.
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
If the URPA system will not activate due to a temporary
condition, the message PARK ASSIST OFF will be
displayed on the DIC and a red light will be shown on
the rear URPA display when the shift lever is moved into
R (Reverse). This occurs under the following conditions:
The driver disables the system.
The ultrasonic sensors are not clean. Keep the
vehicle’s rear bumper free of mud, dirt, snow,
ice and slush. For cleaning instructions, see
Washing Your Vehicle on page 5-117.
A trailer was attached to the vehicle, or a bicycle or
an object was hanging out of the tailgate during the
last drive cycle, the red light may illuminate in the
rear display. Once the attached object is removed,
URPA will return to normal operation.
A tow bar is attached to the vehicle.
The vehicle’s bumper is damaged. Take the vehicle
to your dealer/retailer to repair the system.
Other conditions may affect system performance,
such as vibrations from a jackhammer or the
compression of air brakes on a very large truck.
If the system is still disabled, after driving forward
at least 15 mph (25 km/h), take the vehicle to your
dealer/retailer.
2-64

Rear Vision Camera (RVC)
This vehicle may have a Rear Vision Camera system.
Read this entire section before using it.
{CAUTION:
The Rear Vision Camera (RVC) system does not
replace driver vision. RVC does not:
Detect objects that are outside the camera’s
eld of view, below the bumper, or underneath
the vehicle.
Detect children, pedestrians, bicyclists, or pets.
Do not back the vehicle by only looking at the rear
vision camera screen, or use the screen during
longer, higher speed backing maneuvers or where
there could be cross-traffic. Your judged distances
using the screen will differ from actual distances.
So if you do not use proper care before backing up,
you could hit a vehicle, child, pedestrian, bicyclist,
or pet, resulting in vehicle damage, injury, or death.
Even though the vehicle has the RVC system,
always check carefully before backing up by
checking behind and around the vehicle.
Vehicles Without Navigation System
The rear vision camera system is designed to help the
driver when backing up by displaying a view of the area
behind the vehicle. When the key is in the ON/RUN
position and the driver shifts the vehicle into R (Reverse),
the video image automatically appears on the inside rear
view mirror. Once the driver shifts out of R (Reverse), the
video image automatically disappears from the inside
rear view mirror.
Turning the Rear Vision Camera System
OfforOn
To turn off the rear vision camera system, press and
hold
z, located on the inside rearview mirror, until the
left indicator light turns off. The rear camera vision
display is now disabled.
To turn the rear vision camera system on again, press
and hold
zuntil the left indicator light illuminates.
The rear vision camera system display is now enabled
and the display will appear in the mirror normally.
2-65

Vehicles With Navigation System
The rear vision camera system is designed to help the
driver when backing up by displaying a view of the area
behind the vehicle. When the driver shifts the vehicle
into R (Reverse), the video image automatically appears
on the navigation screen. Once the driver shifts out of
R (Reverse), the navigation screen will go back to the
last screen that had been displayed, after a delay.
Turning the Rear Vision Camera System
On or Off
To turn the rear vision camera system on or off:
1. Shift into P (Park).
2. Press the MENU button to enter the congure
menu options, then press the MENU hard key
to select Display or touch the Display screen button.
3. Select the Rear Camera Options screen button.
The Rear Camera Options screen will display.4. Select the Video screen button. When the Video
screen button is highlighted the RVC system is on.
The delay that is received after shifting out of
R (Reverse) is approximately 10 seconds. The delay
can be cancelled by performing one of the following:
Pressing a hard key on the navigation system.
Shifting in to P (Park).
Reach a vehicle speed of 5 mph (8 km/h).
There is a message on the rear vision camera screen
that states “Check Surroundings for Safety”.
2-66

Adjusting the Brightness and Contrast of
the Screen
To adjust the brightness and contrast of the screen,
press the MENU button while the rear vision camera
image is on the display. Any adjustments made will only
affect the rear vision camera 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 lets the
driver view symbols on the navigation screen while using
the rear vision camera. 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. SeeUltrasonic
Rear Parking Assist (URPA) on page 2-62.The symbols appear when an object has been 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 the MENU hard key to enter the congure
menu options, then press the MENU hard key
repeatedly until Display is selected or touch
the Display screen button.
4. Select the Rear Camera Options screen button.
The Rear Camera Options screen will display.
5. Touch the Symbols screen button. The screen
button will be highlighted when on.Rear Vision Camera Error Messages
Service Rear Vision Camera System:This message
can display when the system is not receiving information
it requires from other vehicle systems.
If any other problem occurs or if a problem persists, see
your dealer/retailer.
2-67

When the System Does Not Seem To
Work Properly
The rear vision camera system might not work properly
or display a clear image if:
The RVC is turned off. See “Turning the Rear
Camera System On or Off” earlier in this section.
It is dark.
The sun or the beam of headlights 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/retailer.
There are extreme temperature changes.The rear vision camera 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 ash.
A slow ash may indicate a loss of video signal, or
no video signal present during the reverse cycle.
A fast ash 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 ash 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 ashing.
During any of these fault conditions, the display will be
blank and the indicator will continue to ash as long
as the vehicle is in R (Reverse) or until the conditions
return to normal.
Pressing and holding
zwhen the left indicator light is
ashing will turn off the video display along with the
left indicator light.
2-70