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:

    Power Lumbar
    Power Lumbar To adjust the power lumbar support, if equipped: • On vehicles with two-way lumbar, press and hold the top or bottom of the control to increase or decrease lumbar support. • On v ...

    Power Sliding Rear Window
    On vehicles with a power sliding rear window, the switch is located in the overhead console. See Rear Windows on page 2‑19. • Push the switch to open the window. • Pull the switch to c ...

    Hitches
    The correct hitch equipment helps maintain combination control. Many trailers can be towed with a weight-carrying hitch which simply features a coupler latched to the hitch ball, or a tow eye latched ...