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. ...

Adaptive cruise control
The XLR will be among the first vehicles with adaptive cruise control (ACC). While not a substitute for full driver attention, this system greatly expands the convenience of cruise control. ACC us ...

Using the Navigation Audio System to Control a USB Storage Device or iPod®
The navigation audio system can control a USB storage device or an iPod by using the radio touch screens and steering wheel controls. 1. Press AUX and then the USB button. 2. Press the center sc ...