See also:

Ending a Call
Turn the Menu knob to select Hang Up, then press SELECT. ...

OnStar®
If the vehicle has OnStar and you subscribe to the OnStar services, please refer to the OnStar Terms and Conditions for information on data collection and use. ...

Making a Call
Calls can be made using the following commands: ► Dial ► Digit Dial ► Call ► Re-dial ...