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:
OnStar Personal Identification Number (PIN)
A PIN is needed to access some of the OnStar services, like Remote Door Unlock
and Stolen Vehicle Assistance. You will be prompted to change the PIN the first
time when speaking with an Advisor. T ...
Transferring Audio from the Bluetooth System to a Cell Phone
During a call with the audio in the vehicle:
1. Press .
2. Say “Transfer Call.” ...
Finding a Channel
BAND: Press to switch between AM, FM, or XM™, if equipped.
(Tune): Turn to manually select an XM channel.
SEEK: Press to go to the previous XM channel.
SEEK: Press to go to the next XM channel ...