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:

    Tire Terminology and Definitions
    Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory We ...

    Calling for Assistance
    When calling Roadside Assistance, have the following information ready: • Your name, home address, and home telephone number. • Telephone number of your location. • Location of the ve ...

    Headphones
    The RSE system includes two sets of wireless headphones. Each set of headphones has an ON/OFF control. An indicator light will illuminate on the headphones when they are on. If the light does ...