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 an Advisor can run a check., and an Advisor can run a check.

    See also:

    Ride Control System Messages
    SERVICE REAR AXLE This message displays when there is a problem with the All-Wheel Drive (AWD) System. See your dealer for service. SERVICE STABILITRAK This message displays if there is a pr ...

    Hydraulic Power Steering
    Your vehicle has hydraulic power steering. It may require maintenance. See Power Steering Fluid Power Steering Fluid  . If power steering assist is lost because the engine stops or the power s ...

    Seat Adjustment
    WARNING You can lose control of the vehicle if you try to adjust a driver seat while the vehicle is moving. The sudden movement could startle and confuse you, or make you push a pedal when you do ...