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:
Lateral Acceleration (CTS-V Only)
Lateral Acceleration measures
the force of a turn or corner.
For example, when turning right, it
forces to the left. This gauge
displays the “g” force from 0.0 g
to 2.0 g. ...
Magnetic Ride Control
The XLR also is one of the world's first vehicles to be equipped with
Magnetic Ride Control - electronically controlled, magnetic-fluid based
real-time damping. The system uses four wheel-to-body ...
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF
in each shift lever position.
The ignition should turn to LOCK/OFF only when the shift lever is in P
(Park). ...