spoogenet

Edit -- I spoke too soon, after rotating the passenger seatbelt, problem seems solved. I guess my ears aren't so good at locating sounds.

My car came with some low-grade tint, so I had it removed and put the good stuff on. Since then I have only driven home and to work now. I noticed a bit of a rattle from the rear, it sounds maybe like the rear deck, when going over some bumps.

Before I go tear the back apart and possibly make something worse, what do you wise folks recommend I should check or do to isolate and fix?