See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Heated Mirrors
The vehicle has heated mirrors: (Rear Window Defogger): Press to heat the mirrors. See “Rear Window Defogger” under Dual Automatic Climate Control System  for more information. ...

Sending a Stored Name Tag During a Call
1. Press . The system responds with “Ready” followed by a tone. 2. Say “Send name tag.” The system responds with “Say a name tag to send tones” followed by a tone. 3. Say the name ...