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:

    Fog Lamps
    To replace one of these bulbs: 1. Locate the fog lamp assembly under the front facia. 2. Disconnect the bulb socket from the electrical connector, turn, and pull out the bulb assembly. 3. Remov ...

    DVD Display Error Messages
    The video screen may display one of the following error messages: Disc Load/Eject Error or Mechanical Error: There are disc load or eject problems. Disc Format Error or Unknown Format: The disc is i ...

    Heavy-DutyTrailer Wiring Harness Package
    For vehicles equipped with heavy duty trailering, the harness connector is mounted in the bumper. The seven-wire harness contains the following trailer circuits: • Yellow: Left Stop/Turn Signal ...