See also:

Radio(s)
VOL/ : Press to turn the system on and off. Turn to increase or decrease the volume. RADIO/BAND or SOURCE: Press to choose between FM, AM, or XM™, if equipped. Menu Knob: Turn to select r ...

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 ...

Starter Switch Check
WARNING: When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before starting this check, be sure there is enough room ...