I have an 03 sable and mine was located behind the back seat on the passenger side. I had to remove the seat cushion first, remove 2 bolts that hold the seat back in place, then push up to release the seat back. remove the nut that holds the middle seat belt in place and you can move the seat back forward. Remove the black plastic cover from behind the seat and remove the 2 10mm nuts that hold the fpdm. Why are you looking to replace yours and what lead you to that as the problem?