I pulled the tuperware off my 03 1800 some time ago, to get wiring from battery to the front. I took the screws out that hold the gas door to the tuperware, in hopes of getting more clearance under the tuperware. After I had everthing back together, the gas door is floopy, and wiggles back and forth when open. When closed, it is tight. I can't see any exploded views in manuals that show a washer that fell out during my work. Any suggestions?