Multi-Band Antenna
The antenna located on the roof of the vehicle is used for the OnStar, XM Satellite Radio Service System, and GPS (Global Positioning System), if the vehicle has these features. Keep the antenna clear of obstructions for clear reception.
If the vehicle has a sunroof and it is open, the performance of OnStar, XM, and GPS can be affected.
See also:
Navigation Control Buttons
The following control buttons are located on the navigation system:
(Power/Volume):
1. Press to turn the system on and off.
2. Turn to increase or decrease the volume to the audio system.
3. Pres ...
Reporting Safety Defects to the United States Government
If you believe that your vehicle has a defect which could cause a crash or
could cause injury or death, you should immediately inform the National Highway
Traffic Safety Administration (NHTSA) in ad ...
Turning the System On or Off
VOL/ (Volume/Power):
Press to turn the system on and off ...