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:
DIC Buttons
A. SET/CLR (Set/Clear): Use this button to set or clear the menu item when
it is displayed.
B. (Thumbwheel): Use the thumbwheel to scroll through the items in each
menu.
A small marker wil ...
Manual Transmission
If the vehicle has a manual
transmission, the shift lever is
located on the center console
between the front seats.
The following explains how to
operate the manual transmission.
CTS
CT ...
Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will
check the engine, transmission, antilock brakes, and major vehicle systems. It also
checks the tire pressures, if the v ...