Turning the Rear Vision Camera System Off or On
To turn off the rear vision camera system, press and hold 
, located on the inside rearview mirror, until the left indicator light turns off.
The rear vision camera display is now disabled.
To turn the rear vision camera system on again, press and hold until the left indicator
light illuminates. The rear vision camera system display is now enabled and the display will appear in the mirror normally.
See also:
Resetting the Power Folding Mirrors
Reset the power folding mirrors if:
• The mirrors are accidentally obstructed while folding.
• They are accidentally manually folded/unfolded.
• The mirrors vibrate at normal driving speeds.
...
OnStar Mobile App
With an iPhone® or Android™-based mobile device, an OnStar mobile app can be
downloaded. The vehicle can be remote started, if equipped, or the doors can be
unlocked from anywhere there is cell ...
Care of the HUD
Clean the inside of the windshield as needed to remove any dirt or film that could reduce the sharpness or clarity of the HUD image.
To clean the HUD lens, use a soft, clean cloth that has household ...