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:
Door Ajar Messages
DOOR OPEN
A door open symbol will be displayed on the DIC showing which door is open.
If the vehicle has been shifted out of P (Park), a DOOR OPEN message will also
be displayed. Close the door c ...
OnStar®
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect
to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic
Services. See OnStar Overview&nb ...
Battery Load Management
The vehicle has Electric Power Management (EPM) that estimates the battery's
temperature and state of charge. It then adjusts the voltage for best
performance and extended life of the battery.
Wh ...