Position: Downstream. Notes: Oxygen Sensor -- Downstream. 2000-2001 Chevrolet Lumina 3.1L V6 VIN: J FI Naturally Aspirated GAS. 1998-1999 Chevrolet Lumina 3.8L V6 VIN: K FI Naturally Aspirated GAS. 1996-1999 Chevrolet Lumina 3.1L V6 VIN: M FI Naturally Aspirated GAS.
