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:
Global Positioning System (GPS)
The navigation system determines the position of the vehicle by using satellite
signals, various vehicle signals, and map data.
At times, other interferences such as the satellite condition, road c ...
Control Buttons
The buttons used to control the radio are:
RADIO/BAND: Press to turn the radio on and choose between AM, FM, and XM™,
if equipped.
MENU/SELECT: Press and turn to navigate the available menus.
...
Thigh Support Adjustment
If available, adjust the manual leg
extension by reaching under it, in
the pocketed area. Press the button
and pull or push to lengthen or
shorten it. Release the button to
lock it in plac ...