See also:

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 ...

Front Fog Lamp Light
The front fog lamp light comes on when the fog lamps are in use. The light goes out when the fog lamps are turned off. See Fog Lamps   for more information. ...

Charging System Light
This light comes on briefly when the ignition key is turned to START, but the engine is not running, as a check to show it is working. If it does not, have the vehicle serviced by your dealer. T ...