WARNING: This page is about a different car, the 2015 GMC Terrain and 2015 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Audio Disc Player And USB Receptacle
Courtesy of GENERAL MOTORS COMPANY
Callout
Component Name
1
Audio Disc Player and USB Receptacle
Procedure
Open arm rest and using a small flat bladed tool, release the receptacle.