Sticking slide

I have a Denali 5th wheel and had the same problem. Combination of the slide seal gasket deteriorating to the point it was sticking to the slide (check the upper edge of your slide at the trim for any black residue). Also, the slide skis (the plastic edges on the bottom of the slide that slide on the roller when slide moves) were cracked, so may have been jamming. Check yours to see if they are cracked along the edge where they bend under the slide. If they are, you also have water leaking into the slide floor. Replaced slide skis last weekend, did the seal gaskets today, we’ll see if that takes care of the problem.