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:
Coverage
Services are provided up to 5 years/160 000 km (100,000 mi), whichever comes first.
In the U.S., anyone driving the vehicle is covered. In Canada, a person driving the vehicle without permission from ...
Special Application Services
○ Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000
km/ 3,000 mi.
○ Have underbody flushing service performed once a year. ...
Shifting out of Park
To shift out of P (Park):
1. Apply the brake pedal.
2. Turn the ignition to ON/RUN.
3. Press the shift lever button.
4. Move the shift lever.
If you still are unable to shift out of P (Park):
1. ...