Delayed Exit Lighting
Delayed exit lighting illuminates the interior for a period of time after the key is removed from the ignition.
The ignition must be off for delayed exit lighting to work. When the key is removed, interior illumination activates and remains on until one of the following occurs:
• The ignition is in ON/RUN.
• The power door locks are activated.
• An illumination period of 20 seconds has elapsed.
If during the illumination period a door is opened, the timed illumination period will be canceled and the interior lamps will remain on because a door is open.
See also:
Roadside Assistance Program
U.S.: 1-888-881-3302
TTY Users (U.S.): 1-888-889-2438
Canada: 1-800-268-6800
Mexico: 01-800-466-0801
As the owner of a new GMC, you are automatically enrolled in the Roadside Assistance program.
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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.
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XM™ Satellite Radio Service
XM is a satellite radio service based in the 48 contiguous United States and 10 Canadian provinces.
XM Satellite Radio has a wide variety of programming and commercial-free music, coast to coast, and ...





