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:
Selecting a Band
Press the RADIO/BAND button to
choose AM, FM, or XM, if equipped.
The last station that was playing
starts playing again. ...
Clock
The infotainment system controls are used to access the time and date settings through the menu system. See Operation for information about how to use the menu system.
Setting the Time and Date ...
High/Low-Beam Headlamps (Up-Level)
The high/low-beam headlamps on the up-level headlamp system are High Intensity Discharge (HID) and should be replaced at the dealer. ...