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:

    Sedan and Wagon Base Model
    From the inside, use the door lock knob on the top of doors. ...

    Oil Pressure (CTS-V Only)
    This display shows the oil pressure in either kilopascals (kPa) or pounds per square inch (psi). ...

    Underbody Maintenance
    Use plain water to flush dirt and debris from the vehicle's underbody. Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop. ...