See also:

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 acces ...

Electric Parking Brake Light
For vehicles with the Electric Parking Brake (EPB), this light should come on briefly as the engine is started. If it does not come on, have the vehicle serviced by your dealer. The parking b ...

Lumbar Adjustment
To adjust the lumbar support: Press and hold the front or rear of the control to increase or decrease lumbar support. Press and hold the top or bottom of the control to raise or lower the ...