WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Refrigerant Pressure Sensor On Compressor Hose
Courtesy of GENERAL MOTORS CORP.
Disconnect the electrical connector from the refrigerant pressure sensor.
Remove the refrigerant pressure sensor from the compressor hose.