WARNING: This page is about a different car, the 1996 Oldsmobile Ninety-Eight and 1996 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Anti-Theft System (PASS-Key II(R)) Wiring Diagram (Ninety Eight & Park Avenue)
Fig 2: Anti-Theft System (Universal Theft Deterrent) Wiring Diagram (Ninety Eight & Park Avenue)