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:
Display Settings
Press the Config button on the
Home Page or the CONFIG button
on the faceplate, then select Display
Settings from the list.
The following options may display:
Dimming Mode: Press to change
t ...
Driver Information Center (DIC)
The DIC display is located in the center of the instrument panel cluster. It
shows the status of many vehicle systems. The controls for the DIC are located on
the turn signal lever.
A. SET/CLR: ...
Automatic Dimming Rearview Mirror
To adjust the inside rearview mirror, hold the rearview mirror in the center
and move it to view the area behind the vehicle.
For vehicles with an automatic dimming rearview mirror, the mirror will ...