Service Bulletins

Service Bulletins give additional technical service information needed to knowledgeably service General Motors cars and trucks.

Each bulletin contains instructions to assist in the diagnosis and service of the vehicle.

    See also:

    Collision Damage Repair
    If the vehicle is involved in a collision and it is damaged, have the damage repaired by a qualified technician using the proper equipment and quality replacement parts. Poorly performed collision rep ...

    Adjusting the Speakers (Balance/Fade)
    BAL/FADE (Balance/Fade): To adjust balance or fade, press the if the radio has this symbol, or the knob until the speaker control tabs display. Continue pressing to highlight the desire ...

    Potential Issues
    Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously for five days. After five ...