On the Acadia, Outlook and Enclave, the quarter trim panel has hidden screw fasteners above the speaker grille and below the armrest (fig. 9) 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.

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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