GMC 2010 Yukon/Yukon XL Owner's Manual page 208

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
screen buttons to increase or decrease the brightness
of the screen.
(Contrast) : Touch the + (plus) or
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. See
Ultrasonic Rear Parking Assist (URPA) on page 3 58.
3-66
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).
(minus)
3. Press the MENU hard key to enter the configure
(minus) screen
4. Select the Rear Camera Options screen button.
5. Touch the Symbols screen button. The screen
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.
menu options, then press the MENU hard key
repeatedly until Display is selected or touch the
Display screen button.
The Rear Camera Options screen will display.
button will be highlighted when on.