Parental Control
The RSE system may have a Parental Control feature, depending on the radio. To enable Parental Control, press and hold the radio power button for more than two seconds to stop all system features such as: radio, video screen, RSA, DVD and/or CD.
While Parental Control is on, 
displays.
When the radio is turned back on, Parental Control is unlocked.
See also:
2011 GMC Acadia Review By Sherrice Gilsbach
Adding glitzy Denali details to the already fabulous 2011 GMC Acadia seems
like a perfect marriage. And it was, with the exception of a few minor dislikes
for this three-row crossover.
With a bo ...
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 ...
Remote Start Ready
If the vehicle does not have the remote vehicle start feature, it may have the
remote start ready feature. This feature allows your dealer to add the manufacturer's
remote vehicle start featur ...