See also:

Hands-Free Calling
1. Push . System responds: “OnStar ready.”. 2. Say “Dial.” System responds: “Please say the name or number to call.”. 3. Say the entire number without pausing, including a “1” and the area c ...

How the System Works
When the vehicle is started, both outside mirror displays will briefly come on to indicate that the system is operating. While driving forward, the left or right side mirror SBZA display w ...

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. ...