TTY Users

OnStar has the ability to communicate to the deaf, hard–of–hearing, or speech–impaired customers while in the vehicle.

The available dealer–installed TTY system can provide in-vehicle access to all of the OnStar services, except Virtual Advisor and OnStar Turn–by–Turn Navigation.

    See also:

    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 v ...

    Extending Engine Run Time
    To extend the engine run time by 10 minutes, repeat Steps 1 and 2 while the engine is still running. The engine run time can only be extended if it is the first remote start since the vehicle ...

    Power Steering Fluid
    See Engine Compartment Overview   for reservoir location. ...