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:

    Radio Messages for XM™ Only
    See XM Radio Messages later in this section for further detail. ...

    Fuel Additives
    To provide cleaner air, all gasolines in the United States are now required to contain additives that help prevent engine and fuel system deposits from forming, allowing the emission control syste ...

    Power Lumbar
    Your vehicle has power lumbar on the driver’s and front passenger’s seats. The seatback lumbar support can be adjusted by moving the control located on the outboard side of the seat cushi ...