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:
Multi-Band Antenna
The multi-band antenna is on the roof of the vehicle. The antenna is used
for the AM—FM radio, OnStar, the XM Satellite Radio Service System, and GPS
(Global Positioning System), if the vehicle has ...
Vehicle Speed Messages
SELECTED SPEED LIMIT EXCEEDED
This message is displayed when the vehicle speed is greater than the set
speed. See "Speed Warning" under Driver Information Center (DIC). ...
When the System Does Not Seem To Work Properly
The RVC system might not work properly or display a clear image if:
The RVC is turned off. See “Turning the RVC System On or Off” earlier
in this section.
It is dark.
The sun or the beam of ...