OnStar Services

See also:

Power Door Locks
On vehicles with power door locks, the switches are located on the front doors. (Unlock): Press to unlock the doors. (Lock): Remove the key from the ignition and press to lock the doors. ...

Outside Heated Mirrors
For vehicles with heated mirrors: (Rear Window Defogger): Press to heat the mirrors. See “Rear Window Defogger” under Climate Control System or Dual Automatic Climate Control System for ...

What to Use
WARNING Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids, can boil before the proper coolant mixture will. The coolant warning sy ...