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:
Manual Operation of Power Liftgate
To change the liftgate to manual operation, turn the mode switch to the OFF
position.
With the power liftgate disabled and all of the doors unlocked, the liftgate
can be manually opened and close ...
Competitive Driving Mode
To select this optional handling
mode, press the TCS/StabiliTrak
button quickly two times and
STABILITRAK COMPETITIVE
MODE displays in the Driver
Information Center (DIC). While in
the Sta ...
Vehicle Information Menu Items
(Vehicle Information): Press to
scroll through the following menu items:
Oil Life
Press the vehicle information button until OIL LIFE REMAINING displays. This
display shows an estimate of the o ...