I remember a previous post about the sound deadning material used for the diesels- as far as I can tell, some of it is still in my truck, and others, not. I have a "thin" insulation against my firewall- it is coated with a plastic surface. THen I also have a thick insulation on top of that, but only on the passenger side. Am I missing a piece from the drivers side? On the interior, i have the "W/T" truck, so it didnt come with carpet, but with a plastic flooring. I plan on removing it and cleaning out the bottom (there's some muck under there!) but I know toward the firewall I am also missing some insulation (and also empty on the side). Is there a particular "diesel" floor insulating matt? Or is the one from LMC the only avaliable? A lot of the noise comes from the transmission tunnel and the "boot" area.