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:
Power Lumbar
On vehicles equipped with either a two-way or four-way
lumbar, the control is located on the outboard side of
the seats.
For a detailed operation description see Power Lumbar . ...
Checking Coolant
The vehicle must be on a level surface when checking the coolant level.
Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not d ...
Radio Settings
To access the Radio Settings menu:
1. Press the CONFIG button.
2. Turn the TUNE/MENU knob until Radio Settings displays. Press the TUNE/MENU
knob to display other options within that feature.
Aud ...