Oh, are you talking about the trim piece at the top of the door panel? The part with the blue arrows going to it that is black in the picture below? If so, it pries off. It's a *****, but it comes off. It's held on by some pretty stout fish hook like clips. But if you can get something to protect the interior panel (piece of plywood) and get a stout screwdriver down inside where the window goes, you should be able to pry it straight up. Try it from several points a little at a time and it'll come off. Grab a replacement from the junkyard in the same fashion. Putting it back on requires a couple good thumps with the meaty part of your hand where your thumb connects to your palm.