in my '96 SS it was behind carpeted kick panel to the right of passengers foot area. Remove that black plastic (wide, about 2 feet across?) cover from under glovebox CAREFULLY- little tabs press in and then it will come down and out. Then the carpeted triangular side piece -again CAREFULLY wiggle it forward, up and out off the tabs. Then look for a plastic covered (whitish color, I think) module about the size of a big bar of soap or oversized cig pack. Unplug it. Gently press the tabs and slide the soldered board out.......I'd rather not rip mine out again to snap a pic, so hopefully you'll find it.
Almost done '96. Oh! Come on- we're never DONE!