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:

    AVG (Average) Economy
    Displays the approximate average liters per 100 kilometers (L/100 km) or miles per gallon (mpg). The calculation is based on the number of L/100 km (mpg) recorded since the last time this di ...

    Side Bolster
    To adjust the side bolster support, if equipped: - Press the top or bottom of the control (A) to increase or decrease support in the seat cushion bolsters. - Press the top or bottom of the ...

    Vehicle Overview
    Going more than a decade without one, Cadillac added a two-passenger sports car to its lineup for 2004. Named the XLR, the retractable-hardtop coupe gave Cadillac a luxury roadster with a performa ...