See also:

Odometer
The vehicle's odometer works together with the Driver Information Center (DIC). The Trip odometer can be set. See “Trip Odometer” under Driver Information Center (DIC)   for more inf ...

BATTERY VOLTS LOW
This message displays when the electrical system is charging less than 10 volts or the battery has been drained. If this message appears immediately after starting the engine, it is possibl ...

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 ...