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. ...

Compass Operation
Press the on/off button once to turn the compass on or off. There is a compass display in the window in the upper right corner of the mirror face. The compass displays a maximum of two character ...

Service Parts Identification Label
This label, located either in the glove box or the trunk area, has the following information: Vehicle Identification Number (VIN). Model designation. Paint information. Production options ...