On the Acadia, Outlook and Enclave, the quarter trim panel has screw fasteners around the cargo screen retainer hook just above the speaker grille (fig. 16) that must be removed before attempting to remove the panel. If the screws are not removed, the panel will crack in the area around the fastener location.

A Screw above speaker grille
The location of the fasteners can be found in SI document 1903783 for Acadia and Outlook and 1899889 for the Enclave.
- Thanks to Gary McAdam

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