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:
Fuel Used
The Fuel Used display shows the approximate liters (L) or gallons (gal) of
fuel that have been used since last reset.
The fuel used can be reset by pressing the SET/CLR button while the Fuel
Used ...
Ultrasonic Parking Assist
If available, Ultrasonic Front and Rear Parking Assist (UFRPA) uses sensors
on the front and rear bumpers to detect objects while parking the vehicle. It
operates at speeds less than 8 km/h (5 mph). ...
Trailer Towing
(CTS-V and Coupe)
The vehicle is neither designed nor
intended to tow a trailer. ...