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:

    Exit Lighting
    With exit lighting, the interior lamps come on when you remove the key from the ignition. If the dome override is off, these lamps stay on for a short period of time and then go out. ...

    Windshield Wipers
    (Mist): Turn the band to mist, for a single wiping cycle. Hold it there until the wipers start. Then let go. The wipers will stop after one wipe. If more wipes are needed, hold the band on mist ...

    Tire Rotation and Required Services Every 12 000 km/7,500 mi
    Rotate the tires, if recommended for the vehicle, and perform the following services. See Tire Rotation. • Check engine oil level and oil life percentage. If needed, change engine oil and ...