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:
What to Use
Refer to Recommended Fluids and Lubricants to determine what kind
of lubricant to use. ...
Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition
Block, and Roadside Assistance, if the vehicle is equipped with these services.
OnStar can unlock the vehicle doors remotely, ...
Remote Keyless Entry (RKE) System
The RKE transmitter is used to remotely lock and unlock the doors from up to
60m (195 ft) away from the vehicle.
Press to unlock the driver door.
Press again within three seconds
to unlock a ...