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:
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Vehicle
Diagnostics, Remote Door Unlock,
Roadside Assistance, Turn-by-Turn
Navigation, and Hands-Free ...
Playing an MP3
While playing a CD, the navigation system is available.
When you insert a CD, the CD tab displays. If a DSP setting is selected for the
CD, it will be activated each time you play a CD. If you turn ...
SERVICE POWER STEERING
This message displays if a problem
is detected with the speed variable
assist steering system. When this
message is displayed, you may
notice that the effort required to
steer the vehicle in ...