I suspect construction is similar to 4th Gen F-bodies. Replacing all, or some specific staples in the inner window sweep (felt) is a strongly recommended PM task for those door panels. IIRC, I used diagonal pliers to cut the existing staples. IIRC, I replaced them with 4-40 machine screws, flat washer, and nylon locking nut. On that vehicle, the nuts do not get overly tightened to allow for some temperature expansion/contraction.