I drive an '04 ZX3 with just over 20K on the clock. Lately, when going over bumps, pot holes, etc., I have been hearing this rattling sound coming from the rear of the car. I think I have narrowed it down to the insided of the rear hatch. The plastic panel on the inside of the hatch, the one with the "2" hand holds on it to close the hatch is loose. It can move around quite easily just by putting a little pressure on it. There are a couple, three "screws" holding it in place, but they just spin when turning them, screw/pins just to hold it in place I guess. Anyone have any ideas how to tighten this up w/o having to go to the dealership? Thanks in advance.