WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Rear Compartment Lid Latch Cover
Courtesy of GENERAL MOTORS COMPANY
Callout
Component Name
1
Rear Compartment Lid Latch Cover Assembly Procedure Use a small flat-bladed tool to pull and release the rear compartment lid latch cover.