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:
Passenger Compartment Air Filter
The filter removes dust, pollen, and other airborne irritants from outside air
that is pulled into the vehicle.
The filter should be replaced as part of routine scheduled maintenance. See Maintenan ...
Safety
Standard safety features include:
Four-wheel antilock brakes
Electronic stability system
Side curtain and side-impact airbags ...
Speedometer
The speedometer shows the vehicle's speed in either kilometers per hour (km/h) or miles per hour (mph). ...