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:

    Security Light
    For information regarding this light and the vehicle’s security system, see Content Theft-Deterrent. ...

    Engine Oil Additives / Engine Oil Flushes
    Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M are all that is needed for good performance and engine protection. Engine oil system ...

    Engine Compartment Fuse Block
    The fuse block is located under the hood in the engine compartment on the driver’s side of the vehicle. Remove the primary cover by pressing the two locking tabs. Remove the secondary cover b ...