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 ...

Tire Pressure Monitor
This vehicle may have a Tire Pressure Monitor System (TPMS). The TPMS warning light alerts you to a significant loss in pressure of one of the vehicle's tires. If the warning light comes on, s ...

Speedometer
Displays a digital speedometer in the DIC. The speed displays in either kilometers per hour (km/h) or miles per hour (mph). To change the units from English to metric, see “Units” later in t ...