WARNING: This page is about a different car, the 1998 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module (Dash Integration Module) Wiring Diagram
Fig 2: Body Control Module (Instrument Panel Integration Module) Wiring Diagram
Fig 3: Body Control Module (Rear Integration Module) Wiring Diagram