See also:

Retrieve My Number
1. Push . System responds: “OnStar ready.”. 2. Say “My Number.” System responds: “Your OnStar Hands-Free Calling number is.” ...

Turning the System On or Off
VOL/ (Volume/Power): Press to turn the system on and off ...

Power Liftgate
On vehicles with a power liftgate, the switch is on the driver door. The vehicle must be in P (Park) to use the power feature. The taillamps flash when the power liftgate moves. WARNING ...