See also:

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 ...

Auto Door Unlock
This allows selection of which of the doors will automatically unlock when the vehicle is shifted into P (Park). Press SELECT when Auto Door Unlock is highlighted. Turn the Menu knob to selec ...

Fuel Additives
To provide cleaner air, all gasolines in the United States are now required to contain additives that help prevent engine and fuel system deposits from forming, allowing the emission control system to ...