See also:

Horn
Press on the steering wheel pad to sound the horn. ...

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.” System re ...

Receiving a Call
When an incoming call is received, the audio system mutes and a ring tone is heard in the vehicle. - Press to answer the call. - Press to ignore a call. ...