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:

    Voltmeter Gauge
    This gauge indicates the battery voltage when the ignition is turned on. When the ignition is on, this gauge indicates the battery voltage. When the engine is running, this gauge shows the conditi ...

    Interior Care
    To prevent dirt particle abrasions, regularly clean the vehicle's interior. Immediately remove any soils. Note that newspapers or dark garments that can transfer color to home furnishings can ...

    Uniform Tire Quality Grading
    Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: ...