WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Audio Disc Player and USB Receptacle
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
1
Audio Disc Player and USB Receptacle Procedure: Open arm rest and using a small flat bladed tool, release the receptacle.