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:

    Heated Mirrors
    The vehicle may have heated mirrors: (Rear Window Defogger): Press to heat the mirrors. See “Rear Window Defogger” under Climate Control Systems  for more information. ...

    Rear Axle
    When to Check Lubricant It is not necessary to regularly check rear axle fluid unless you suspect there is a leak or you hear an unusual noise. A fluid loss could indicate a problem. Have it inspe ...

    Winter Tires
    Consider installing winter tires on the vehicle if frequent driving on snow or ice covered roads is expected. All season tires provide good overall performance on most surfaces, but they may not offer ...