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:
Noise, Ride & Handling
Road and wind noise are low, but you'll hear more adjacent traffic than I'd
expect in a luxury crossover. The Lincoln MKX and GLK, to name a couple
competitors, are superior in this regard.
With ...
Compass
The vehicle may have a compass display on the Driver Information Center
(DIC). The compass receives its heading and other information from the Global
Positioning System (GPS) antenna, StabiliTrak, a ...
Brakes
This vehicle has disc brakes.
Disc brake pads have built-in wear indicators that make a high-pitched
warning sound when the brake pads are worn and new pads are needed.
The sound can come and g ...