WARNING: This page is about a different car, the 1995 Cadillac Seville and 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: 4.6L (VIN Y & 9) PCM Wiring Diagram (Concours & Seville - 1 Of 3)
Fig 2: 4.6L (VIN Y & 9) PCM Wiring Diagram (Concours & Seville - 2 Of 3)
Fig 3: 4.6L (VIN Y & 9) PCM Wiring Diagram (Concours & Seville - 3 Of 3)
Fig 4: 4.9L (VIN B) PCM Wiring Diagram (DeVille - 1 Of 3)
Fig 5: 4.9L (VIN B) PCM Wiring Diagram (DeVille - 2 Of 3)
Fig 6: 4.9L (VIN B) PCM Wiring Diagram (DeVille - 3 Of 3)