WARNING: This page is about a different car, the 2006 Pontiac Torrent and 2006 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Cruise Control Switch Assembly
Courtesy of GENERAL MOTORS CORP.
Use a small flat-bladed tool to release the switch assembly from the steering wheel.
Disconnect the cruise switch electrical harness connector from the switch.