See also:

Overview (Radio with CD/DVD and MEM)
A. VOL/ - Turns the system on or off and adjusts the volume. B. Buttons 1 to 6 - Radio: Saves and selects favorite stations. - MEM: Saves and selects favorite tracks and playlists. C. TU ...

Potential Issues
Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously for five days. After five ...

Sunroof
If the vehicle has a power sunroof it will only operate when the ignition is in ON/RUN or ACC/ACCESSORY, or when Retained Accessory Power (RAP) is active. See Ignition Positions (Key Access) ...