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:

    Increasing Speed While Using Cruise Control
    If the cruise control system is already activated: - Press and hold the +RES button on the steering wheel until the desired speed is reached, then release it. - To increase vehicle speed in ...

    Tips and Troubleshooting Chart
    ...

    StabiliTrak® OFF Light
    This light should come on briefly as the vehicle is started. If it does not come on, have the vehicle serviced by your dealer. This light comes on when the StabiliTrak system is turned off by ...