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:
How to Check AutomaticTransmission Fluid
Because this operation can be a little difficult, you
may choose to have this done at the dealership
service department.
If you do it yourself, be sure to follow all the
instructions here, or yo ...
Cleaning Exterior Lamps/Lenses and Emblems
Use only lukewarm or cold water, a soft cloth, and a car washing soap to clean
exterior lamps and lenses. Follow instructions under "Washing the Vehicle" later
in this section. ...
Setting the Month and Day Format
1. Press the CONFIG button and
select Time and Date Settings,
or press .
2. Highlight Set Date Format.
3. Press SELECT to select MM/DD/YY (month/day/year) or DD/MM/YY (day/month/year). ...