Unable to Connect to OnStar Message
If there is limited cellular coverage
or the cellular network has reached
maximum capacity, this message
may come on. Push 
to try the
call again or try again after driving a
few miles into another cellular area.
See also:
Vehicle Positioning
At times, the position of the vehicle on the map may be inaccurate due to one
or more of the following reasons:
Road system has changed.
Vehicle is driving on slippery road surfaces such as in ...
Selecting the XM Band
Press the RADIO/BAND button to choose between the AM, FM and XM bands. The
last channel played in that band begins to play when that band is selected. ...
Hill and Mountain Roads
Driving on steep hills or through mountains is different than driving on
flat or rolling terrain. Tips for driving in these conditions include:
- Keep the vehicle serviced and in good shape.
- ...