See also:

Trip Odometer
The trip odometer can record the number of kilometers or miles traveled for up to two trips. The trip odometer is part of the Driver Information Center (DIC); for more information see Driver ...

Warning Lights, Gauges, and Indicators
Warning lights and gauges can signal that something is wrong before it becomes serious enough to cause an expensive repair or replacement. Paying attention to the warning lights and gauges c ...

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 ...