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:
Airbag System Messages
SERVICE AIRBAG
This message displays if there is a problem with the airbag system. Take the
vehicle to your dealer for service. ...
Playing from an iPod
This feature supports the following iPod models:
○ iPod nano (1st, 2nd, 3rd, and 4th generation)
○ iPod with video (5.0 and 5.5 generation). Video is not shown; only audio is supported.
...
Emissions Inspection and Maintenance Programs
Some local governments may have programs to inspect the on-vehicle emission control
equipment. For the inspection, the emission system test equipment is connected to
the vehicle’s Data Link Conn ...