How Do I remove This Trim Piece On A Fleetwood

I know you ask how to remove it but I would try this first.

Try taping the front half of the molding piece with 2 inch painters tape to the coach, ie... Half of the tape on the trim and the other half to the coach in front of the trim. Take a drive and see if you still squeak.

Would try something like this first. As others said, you may damage the paint on the trim when you remove it. Any flex may crack the paint.