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 Security
This vehicle has theft-deterrent
features; however, they do not make
it impossible to steal. ...
Accessories and Modifications
Adding non-dealer accessories or making modifications
to the vehicle can affect vehicle performance and safety, including such things
as airbags, braking, stability, ride and handling, emissions s ...
Control Buttons
The buttons used to control the XM radio are:
RADIO/BAND or SRCE (Source): Press to turn the radio on and choose between AM,
FM, and XM.
or
: Press to go to the previous or next
channel.
FAV ...