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:

    Time and Date Settings
    From the Time and Date Settings screen button, press to display the Time and Date Settings menu. Set Time: Press + or − to increase or decrease the Hours and Minutes displayed on the clock. ...

    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 follow ...

    Programmable Unlocking Feature
    The following is the list of available programming options: Mode 1: Driver’s door unlocks when the transmission is shifted into PARK (P). Mode 2: All doors unlock when the transmission is shi ...