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:

    Flash-to-Pass
    Use your high-beam headlamps to signal to a driver in front that you want to pass. It works even if the headlamps are in the automatic position. To use it, pull the turn signal lever toward you, th ...

    Cooling System
    The cooling system allows the engine to maintain the correct working temperature. A. Coolant Surge Tank B. Coolant Surge Tank Pressure Cap C. Engine Cooling Fan(s) (Out of View) WARNING An ...

    Infants and Young Children
    Everyone in a vehicle needs protection! This includes infants and all other children. Neither the distance traveled nor the age and size of the traveler changes the need, for everyone, to use safe ...