See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Height Adjustment
Height Adjustment Press and hold the top or bottom of the switch to raise or lower the seat. Release the switch when the desired height is reached. ...

Compass
The vehicle has a compass display in the DIC. See Compass  for more information. ...