You must remove the center console (shifter, parking brake). There's a gold box next to the parking brake assembly - this is the control for the auto seatbelt system. Here's the question though - ARE BOTH SEATBELTS INOPERABLE? If so, you most likely need a new control box (don't be lazy - go to a pick-n-pull yard). If not, you wil most likely need a new track and motor (these are both located in the side panel near the window trim. Peace and good luck!