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 vehic ...

Instrument Panel Illumination Control
The instrument panel brightness knob is located on the instrument panel to the left of the steering column. (Instrument Panel Brightness): Push the knob in all the way until it extends out and the ...

Tire Pressure Light
For vehicles with the Tire Pressure Monitor System (TPMS), this light comes on briefly when the engine is started. It provides information about tire pressures and the TPMS. When the Light Is O ...