1Durable and easy installation 2Improve fuel economy and increase engine response 3High level of accuracy and sensitivity to protect safety of your car 4Designed to detect the amount of oxygen in the exhaust system 5Original standard, direct replacement for your old or broken oneFeatures:_x000D_1. Durable and easy installation._x000D_2. Improve fuel economy and increase engine response._x000D_3. High level of accuracy and sensitivity to protect safety of your car._x000D_4. Designed to detect the amount of oxygen in the exhaust system. _x000D_5. Original standard, direct replacement for your old or broken one._x000D_6. Pretested, precise and high quality oxygen sensor. Lower emissions and eco-friendly.Specification:_x000D_Item Type: Oxygen Sensor_x000D_Material: Aluminum_x000D_Color: As Pictures Show_x000D_OE Number: SG454/234-4012 SG272/234-4018_x000D_Quantity: 2Pcs SG454, 2Pcs SG272_x000D_Package Weight: Approx. 495g_x000D_Fitment: _x000D_For V8 5.3L 2002 (excluding Canada Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For V8 5.7L 1999-00 Downstream Upstream O2 Oxygen Sensor_x000D_For Astro V6 4.3L 1996-97 Downstream Upstream O2 Oxygen Sensor_x000D_For Avalanche 1500 V8 5.3L 2002 (excluding Canada Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 Truck V8 5.0L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 Truck V8 5.7L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 Truck V6 4.3L 1996-98 Downstream Upstream O2 Oxygen Sensor_x000D_For C2500 Truck V8 5.0L 1996-00 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C2500 Truck V8 5.7L 1996-00 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C2500 Truck V8 5.7L 1996-98 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For Express 1500 Van V8 5.7L 1996-02 Under 8500LB GVW Downstream Upstream O2 Oxygen Sensor_x000D_For Express 1500 Van V8 5.0L 1996-02 Downstream Upstream O2 Oxygen Sensor_x000D_For Express 1500 Van V6 4.3L 1996-02 Downstream Upstream O2 Oxygen Sensor_x000D_For Express 2500 Van V8 5.7L 1996-02 Under 8500LB GVW Downstream Upstream O2 Oxygen Sensor_x000D_For Express 2500 Van V8 5.0L 1998-02 Downstream Upstream O2 Oxygen Sensor_x000D_For Express 2500 Van V6 4.3L 1996-02 Under 8500LB GVW Downstream Upstream O2 Oxygen Sensor_x000D_For K1500 Truck V6 4.3L 1996-98 Downstream Upstream O2 Oxygen Sensor_x000D_For K1500 Truck V8 5.0L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For K1500 Truck V8 5.7L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For K2500 Truck V8 5.7L 1996-98 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For K2500 Truck V8 5.0L 1997-98 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 V8 4.8L 2000-02 (US Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 V8 5.3L 2000-02 (excluding Canada Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 V8 5.3L 1999 Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 V8 4.8L 1999 Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 V6 4.3L 1999-01 Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 V6 4.3L 2002 (8th Vin Digit X) Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 1500 HD V8 6.0L 2001 Downstream Upstream O2 Oxygen Sensor Passenger Side_x000D_For Silverado 2500 V8 5.3L 2000 (excluding Canada Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For Silverado 2500 V8 5.3L 1999 Downstream Upstream O2 Oxygen Sensor_x000D_For 1500 V8 5.3L 2000-02 (excluding Flex Fuel) (US Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 V8 5.7L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C2500 V8 5.7L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For K1500 V8 5.7L 1996-99 Downstream Upstream O2 Oxygen Sensor_x000D_For K2500 V8 5.7L 1996 Downstream Upstream O2 Oxygen Sensor_x000D_For Tahoe V8 5.3L 2000-02 (8th Vin Digit Z) (US Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For Tahoe V8 4.8L 2000-02 (US Built Models) Downstream Upstream O2 Oxygen Sensor_x000D_For Tahoe V8 5.7L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 Truck V8 5.7L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 Truck V8 5.0L 1996-99 with 4L60E 4 Speed Automatic Transmission Downstream Upstream O2 Oxygen Sensor_x000D_For C1500 Truck V6 4.3L 1996-98 Downstream Upstream O2 Oxygen Sensor_x000D_For C2500 Truck V8 5.7L 1996-99 Downstream Upstream O2 Oxygen Sensor_x000D_For C2500 Tru