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

    See also:

    Cruise Control Light
    This light comes on whenever the cruise control is active. The light goes out when the cruise control is turned off. See Cruise Control for more information. ...

    Using Voice Commands During a Planned Route
    Cancel Route 1. Push . System responds: OnStar ready, then a tone. Say Cancel route. System responds: Would you like to cancel route directions to your destination? 2. Say Yes. System re ...

    Trailer Towing
    If the vehicle is a hybrid, see the hybrid supplement for more information. Do not tow a trailer during break-in. See New Vehicle Break-In   for more information. WARNING The drive ...