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

    See also:

    Front Fog Lamp Light
    For vehicles with front fog lamps, this light comes on when the front fog lamps are in use. The light goes out when the front fog lamps are turned off. See Front Fog Lamps  for more inform ...

    If the Off Indicator Is Lit for an Adult-Size Occupant
    If a person of adult size is sitting in the front outboard passenger seat, but the off indicator is lit, it could be because that person is not sitting properly in the seat. Use the following st ...

    When the System Does Not Seem to Work Properly
    The RVC system may not work properly or display a clear image if: • The RVC is turned off. See “Turning the Rear Camera System On or Off” earlier in this section. • It is dark. • ...