I took a look at the back of my 2001, and it appears the hitch takes the place of the bumper shocks. I took the bumper off of the 2002 at the yard and set it aside to remove the hitch itself, so it should still be there if I need anything else. I don't know if I got everything I should have, but I got:
1) the hitch itself and the 8 bolts and nuts that hold it on (nuts are in front)
2) the 2 mounts that hold the bumper on (with the 2 big T55 torx)
3) the wiring harness
4) the control module
5) the mount for the wiring harness with 2 bolts to hold it on

Is the bumper "reinforcement" (that's the metal part inside the plastic bumper cover, right?) different than the one I have now?

Anything else I need to check? thx