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:
English and Metric Unit Conversion
To change the display units between English and metric units, see Driver Information
Center (DIC) on page 5‑23 for more information. ...
Steering, Suspension, and Chassis Components
Visually inspect front and rear suspension and steering system for damaged, loose, or missing parts or signs of wear. Inspect the power steering for proper hook-up, binding, leaks, cracks, chafing, et ...
Playing from a USB
A USB mass storage device or Microsoft Transfer Protocal (MTP) device can be
connected to the USB port.
The USB port is in the center console.
The USB icon displays when the USB device is connecte ...