Chevrolet 2007 Avalanche Navigation Manual page 50

Display
Press the MENU key to enter the Menu options,
then press the MENU key repeatedly until Display
is selected or touch the Display screen button.
Display Off
Touch this screen button to turn the display off.
Press any hard key to view the display.
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Brightness/Contrast/Mode
Touch this screen button to change the brightness,
contrast, and mode of the display.
(Brightness): Touch the + (plus) or − (minus)
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screen buttons to increase or decrease the
brightness of the screen.
(Contrast): Touch the + (plus) or − (minus)
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screen buttons to increase or decrease the
contrast of the screen.