See also:

TTY Users
OnStar has the ability to communicate to the deaf, hard&-ofhearing, or speech&-impaired customers while in the vehicle. The available dealer&-installed TTY system can provide in-vehicl ...

Audio System
When using the Bluetooth system, sound comes through the vehicle's front audio system speakers and overrides the audio system. Use the VOL/ knob during a call to change the volume level. The a ...

Finding a Channel
BAND: Press to switch between AM, FM, or XM™, if equipped. (Tune): Turn to manually select an XM channel. SEEK: Press to go to the previous XM channel. SEEK: Press to go to the next XM channel ...