2001 Chevrolet Express 2500 Before Catalytic Converter, Driver And Passenger S Oxygen Sensor, Engine VIN: FI, R, Naturally Aspirated, CNG, Under GVW 8,500 Lbs., Set Of 2, 4-Wire, 5.7L
2003 Chevrolet Express 2500 LS Driver And Passenger Side, After Catalytic Converter Oxygen Sensor, 1st Design - Right Oem Sensor Length 14.75, Set Of 2, 4-Wire, 4.8L 8Cyl
2001 Chevrolet Express 2500 Before Catalytic Converter, Driver And Passenger S Oxygen Sensor, Engine VIN: FI, R, Naturally Aspirated, CNG, Under GVW 8,500 Lbs., Set Of 2, 4-Wire, 5.7L