See also:

Control Buttons
The buttons used to control the XM radio are: RADIO/BAND: Press to turn the radio on and choose between AM, FM, and XM, if equipped. SEEK / SEEK: Press to go to the previous or next channel. ...

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 ...

Using Voice Commands During a Planned Route
Cancel Route 1. Push . System responds: “OnStar ready,” then a tone. Say “Cancel route.” System responds: “Would you like to cancel route directions to your destination?”. 2. Say “Yes.” Syst ...