See also:

Vehicle Positioning
At times, the position of the vehicle on the map may be inaccurate due to one or more of the following reasons: Road system has changed. Vehicle is driving on slippery road surfaces such as in ...

Selecting a Station
Seek Tuning (Radio with CD) If the radio station is not known: Briefly press SEEK or SEEK to automatically search for the next available station. If a station is not found, the radio switches ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...