Holiday Rambler storage compartment door removal

I need to remove a storage compartment door due to something causing a bulge in the "hinge" area when it's closed. I think its a "curl under the side trim" type of attachment. Has anybody removed theirs that can suggest a hint? I do not see a true hinge anywhere along the top edge of the door. The side trim is caulked to the body above it and when the door closes it appears there is something between the door and trim as the trim moves out and leaves a gap that allows water and dirt in it. None of the other doors has that issue. On my old Pace Arrow, there was a cap on the end of the side moulding that, when removed, allowed the doors to be slid toward the end and out of the channel. The trim on this one is riveted but I don't want to drill out the rivet unless absolutely necessary to accomplish my goal. My coach is a twin to the Monaco LaPalma bodywise.