See also:

Unlock Feedback
Press the customization button until UNLOCK FEEDBACK: LAMPS appears in the display. To select your preference for the feedback you will receive when unlocking the vehicle with the Remote Keyless E ...

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. ...

Using the Call Command
1. Press and hold for two seconds. The system responds with “Ready” followed by a tone. 2. Say “Call”. The system responds with “Call using <phone name>. Please say the name ta ...