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:

    Power Steering Fluid (2.4L L4 Engine)
    The vehicle has electric power steering and does not use power steering fluid. ...

    Highbeam On Light
    This light comes on when the high-beam headlamps are in use. See Headlamp High/Low-Beam Changer for more information. ...

    Backglass Antenna
    The AM-FM antenna is integrated with the rear window defogger, located in the rear window. Make sure that the inside surface of the rear window is not scratched and that the lines on the glass a ...