WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
Callout
Component Name
Preliminary Procedure Fold down the rear seat backs.
1
Liftgate Latch Release Adapter Hole Plug
2
Operating Lever Procedure Turn the lever with a suitable toll in the shown direction.