WARNING: This page is about a different car, the 1998 Pontiac Trans Sport, 1998 Oldsmobile Silhouette, and 1998 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module Wiring Diagram
Fig 2: Illumination/Interior Lights Wiring Diagram (1 Of 2)
Fig 3: Illumination/Interior Lights Wiring Diagram (2 Of 2)