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:

    What to Use
    Refer to Recommended Fluids and Lubricants on page 11‑12 to determine what kind of lubricant to use. ...

    Trip/Fuel Menu Items (with DIC Buttons)
    (Trip/Fuel): Press this button to scroll through the following menu items: ...

    Treadwear 200 Traction AA Temperature A
    The following information relates to the system developed by the United States National Highway Traffic Safety Administration (NHTSA), which grades tires by treadwear, traction, and temperature pe ...