See also:

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) ...

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 ...

Starting the Gasoline Engine
Place the transmission in the proper gear by moving the shift lever to P (Park) or N(Neutral). To restart the engine when the vehicle is already moving, use N (Neutral). Notice: Do not try to shi ...