I have had a rattle coming from my back seat since the day I purchased the truck about a year ago. It does not seem to be coming from the door, like a speaker or something, but more from the backseat itself. Not sure if it's the bottom or the top portion. I sat back there one day while my wife drove around but I did not hear the router at all. I think once you're sitting in the seat, the rattle goes away. It sounds like a loose piece of metal lightly tapping against something else but I'm driving and going over a little bumps. Anybody else have this issue?