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:
Adjusting the Fader and Balance
1. Press the TONE button.
2. Select Fader or Balance.
3. Select the value.
Press the BACK button to go
back to the Tone Settings menu. ...
Footnotes — Maintenance Schedule Additional Required Services — Normal
a) Check all fuel and vapor lines and hoses for proper hook-up, routing, and
condition. Check that the purge valve, if the vehicle has one, works properly. Replace
as needed.
b) Or every four yea ...
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
message ENGINE OVERHEATED STOP ENGINE is
displayed, an overheat protection mode which alternates
firing groups of cylinders helps prevent engine ...