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 vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push OnStar Additional Information , and an Advisor can run a check.

    See also:

    Highbeam On Light
    This light comes on when the high-beam headlamps are in use. ...

    Braking
    Braking action involves perception time and reaction time. Deciding to push the brake pedal is perception time. Actually doing it is reaction time. Average driver reaction time is about thr ...

    Ignition Positions (Key Access)
    Ignition Positions (Key Access) The ignition switch has four different positions. Notice: Using a tool to force the key to turn in the ignition could cause damage to the switch or break t ...