WARNING: This page is about a different car, the 2002 Cadillac Seville and 2001 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Park Brake Release System Wiring Diagram (2001 Seville)
Fig 2: Reverse Lockout System Wiring Diagram (2001 Seville)
Fig 3: Shift Interlock System Wiring Diagram (2001 Seville)
Fig 4: Park Brake Release System Wiring Diagram (2002 Seville)
Fig 5: Reverse Lockout System Wiring Diagram (2002 Seville)
Fig 6: Shift Interlock System Wiring Diagram (2002 Seville)