WARNING: This page is about a different car, the 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Back-up Lamps Circuit
Fig 2: Exterior Lamps Circuit, Cutaway Chassis (1 of 2)
Fig 3: Exterior Lamps Circuit, Cutaway Chassis (2 of 2)
Fig 4: Exterior Lamps Circuit, Except Cutaway (1 of 2)
Fig 5: Exterior Lamps Circuit, Except Cutaway (2 of 2)