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:

    Programmable Locking Feature
    Following are the two locking modes that can be programmed: Mode 1: All doors lock when the transmission is shifted out of PARK (P). Mode 2: All doors lock when the vehicle speed is greater t ...

    General Information
    Notice: Maintenance intervals, checks, inspections, recommended fluids, and lubricants are necessary to keep this vehicle in good working condition. Damage caused by failure to follow scheduled mainte ...

    Roadside Assistance Program
    For U.S. purchased vehicles, call 1-800-252-1112; (Text Telephone (TTY): 1-888-889-2438). For Canadian purchased vehicles, call 1-800-268-6800. Service is available 24 hours a day, 365 days a year ...