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:
Tire Pressure Light
For vehicles with the Tire Pressure Monitor System (TPMS), this light comes
on briefly when the engine is started. It provides information about tire
pressures and the TPMS.
When the Light Is ...
Detailed Areas
Road network attributes are contained in the map database for detailed areas.
Attributes include information such as street names, street address, turn restrictions,
etc. A detailed area includes ...
Engine Oil Messages
CHANGE ENGINE OIL SOON
When this message displays, it
means that service is required for
the vehicle. See your dealer.
See Maintenance Schedule and Engine Oil for more information.
When you res ...