2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 207

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. Touch the + (plus) or - (minus) screen buttons to increase or decrease the brightness of the screen. 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 configure 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. ] (Brightness) : _ (Contrast) : Symbols Touch the + (plus) or - (minus) screen buttons to increase or decrease the contrast of the screen. 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 3‑64. 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. 3-69