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:

    Bulb Replacement
    For the proper type of replacement bulbs, see Replacement Bulbs . For any bulb-changing procedure not listed in this section, contact your dealer. ...

    Climate Control System
    The heating, cooling, and ventilation for the vehicle can be controlled with this system. For vehicles with the remote start feature, when activated, the climate control system heats or cools the ...

    Braking
    See Brake System Warning Light . Braking action involves perception time and reaction time. Deciding to push the brake pedal is perception time. Actually doing it is reaction time. Average reaction ...