Special Application Services

• Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi.

• Have underbody flushing service performed once a year.

    See also:

    Lumbar Adjustment
    To adjust the lumbar support: ► Press and hold the front or rear of the control to increase or decrease lumbar support. ► Press and hold the top or bottom of the control to raise or lo ...

    Vehicle and Power Issues
    OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not o ...

    Replacement Bulbs
    For replacement bulbs not listed here, contact your dealer/retailer. ...