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:
Aluminum or Chrome-Plated Wheels
and Trim
The vehicle may have either aluminum or chrome-plated
wheels.
Keep the wheels clean using a soft clean cloth with mild
soap and water. Rinse with clean water. After rinsing
thoroughly, dry with ...
Instrument Panel Illumination Control
The brightness of the instrument panel lighting and steering wheel controls can be adjusted.
:
Move and hold the thumbwheel up or down to brighten or dim the lights. ...
Passing
More passing distance is needed when towing a trailer.
Because the rig is longer, it is necessary to go much
farther beyond the passed vehicle before returning to
the lane. ...