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 ...

Instrument Panel
A. Air Vents. B. Turn and Lane—Change Lever. See Turn and Lane-Change Signals. Driver Information Center (DIC) Controls. See Driver Information Center (DIC). C. Cruise Control. Hea ...

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. - The ignition should turn to LOCK/OFF only when the shift lever is in P (Pa ...