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:

    At Least Once a Year
    Starter Switch Check CAUTION: When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before you start, be sure you have e ...

    Outside Power Mirrors
    Controls for the outside power mirrors are located on the driver’s door armrest. To adjust the mirror: 1. Press the left or right side of the selector switch located beneath the control ...

    Power Steering Fluid
    See Engine Compartment Overview for information on the location of the power steering fluid reservoir. ...