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:

    StabiliTrak® OFF Light
    This light comes on when the StabiliTrak system is turned off. If the Traction Control System (TCS) is off, wheel spin is not limited. If the StabiliTrak system is off, the system does not assis ...

    Power Mirrors
    Vehicles with outside power mirrors have controls located on the driver door. To adjust each mirror: 1. Press (A) or (B) to select the driver or passenger side mirror. 2. Press the arrows on the ...

    Engine Identification
    The eighth character in the VIN is the engine code. This code identifies the vehicle's engine, specifications, and replacement parts. See “Engine Specifications” under Capacities and Specification ...