The oxygen sensor measures combustion efficiency based off the amount of oxygen in the exhaust gas.

Walker Products Engine Management and Oxygen/Air-Fuel sensors have been engineered and developed to be an Original Equipment Manufacturers replacement for many vehicles worldwide. Every part number is manufactured for the specific application, fitment position on the vehicle, and will provide the relevant diagnostic system feedback as required by the ECU. Newer vehicles will store fault codes in the ECU, some will relate to the affected sensor and its associated systems. A failed sensor might make itself known by causing the engine to run poorly, increase fuel consumption, exhaust emissions, or illuminating a (MIL) malfunction indicator light. The sensor, wiring harness, and connector should also be checked for physical damage. This will most likely also cause their operational life to be shortened. We are an Automotive ISO9001/TS 16949 certified company, with un-paralleled customer service, marketing, and shipping. Our electronic and paper catalogs are designed for todays fast paced marketplace, along with our eye catching packaging. Since 1946, Walker Products has been the number one choice for the engine management sensors and fuel system components needed for your vehicle. -¬ 2023 Walker Products Inc. All rights reserved.

• Coated in with electrodes made of a gas-permeable platinum layer.
• Measures oxygen levels to fine-tune air-fuel mixture, improving fuel economy and saving costs.
• Monitors exhaust gases and reduces pollutants for a cleaner environment.
• Coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases.
• Determines the oxygen content of the exhaust gas, monitoring the air fuel ratio for combustion efficiency.

CA_Prop65_Nickel:	WARNING: This product can expose you to chemicals, including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. www.p65warnings.ca.gov
Connector Gender:	Female
Connector Shape:	Square
Mounting Type:	Threaded
Overall Length:	375.0
Sensor Type:	Heated
Thread Diameter:	18.0
Thread Size:	M18
Universal Or Specific Fit:	Specific
Wire Gauge Measurement:	20.0
Wire Quantity:	4

• 1996-1999 Cadillac DeVille | Position: Upstream Front
• 1996-1999 Cadillac DeVille | Position: Upstream Rear
• 1996-1999 Cadillac Seville | Position: Upstream Front
• 1996-1999 Cadillac Seville | Position: Upstream Rear
• 1996-1999 Chevrolet C1500 Suburban | Position: Downstream Right
• 1996-2000 Chevrolet C2500 | Position: Downstream Right
• 1996-1999 Chevrolet C2500 Suburban | Position: Downstream Left
• 1996-2000 Chevrolet C3500 | Position: Downstream Right
• 1996-2002 Chevrolet Express 3500 | Position: Downstream Left
• 1996-2002 Chevrolet Express 3500 | Position: Downstream Right
• 1996-1997 Chevrolet K1500 | Position: Downstream
• 1996-2000 Chevrolet K2500 | Position: Downstream Right
• 1996-1999 Chevrolet K2500 Suburban | Position: Downstream Left
• 1996-2000 Chevrolet K3500 | Position: Downstream Left
• 1996-1999 Chevrolet P30 | Position: Downstream Left
• 1996-1999 Chevrolet P30 | Position: Downstream Right
• 1996-1997 Chevrolet Tahoe | Position: Downstream
• 1996-1999 GMC C1500 Suburban | Position: Downstream Left
• 1996-2000 GMC C2500 | Position: Downstream Left
• 1996-2000 GMC C2500 | Position: Downstream Right
• 1996-1999 GMC C2500 Suburban | Position: Downstream Right
• 1996-2000 GMC C3500 | Position: Downstream Left
• 1996-1999 GMC K1500 | Position: Downstream Left
• 1996-1999 GMC K1500 | Position: Downstream Right
• 1996-1999 GMC K1500 Suburban | Position: Downstream Left
• 1996-1999 GMC K1500 Suburban | Position: Downstream Right
• 1996-2000 GMC K3500 | Position: Downstream Left
• 1996-1999 GMC P3500 | Position: Downstream Left
• 1996-1997 GMC Safari | Position: Downstream
• 1996-2002 GMC Savana 3500 | Position: Downstream Right
• 1996-2000 GMC Yukon | Position: Downstream Left
• 1997-2003 Buick Regal | Position: Upstream
• 1997-1998 Buick Skylark | Position: Upstream
• 1997 Chevrolet Camaro | Position: Upstream Left
• 1997 Chevrolet Camaro | Position: Upstream Right
• 1997-2001 Chevrolet Lumina | Position: Upstream
• 2002 GMC Yukon | Position: Downstream Left
• 1997-1998 Oldsmobile Achieva | Position: Upstream
• 1997-1998 Oldsmobile Regency | Position: Upstream
• 1997 Pontiac Firebird | Position: Upstream Left
• 1997 Pontiac Firebird | Position: Upstream Right
• 1997-2003 Pontiac Grand Prix | Position: Upstream
• 1997-1998 Pontiac Trans Sport | Position: Upstream
• 1998-2002 Chevrolet Express 1500 | Position: Downstream
• 1998-2000 Chevrolet Tahoe | Position: Downstream Left
• 1998-2002 GMC Savana 1500 | Position: Downstream
• 1998-1999 Oldsmobile Intrigue | Position: Upstream
• 1998-2000 Pontiac Firebird | Position: Upstream Left | Note: In Manifold, 4 Wire Sensor
• 1998-2000 Pontiac Firebird | Position: Upstream Right | Note: In Manifold, 4 Wire Sensor
• 1999-2000 Cadillac Escalade | Position: Downstream Right
• 1999 Chevrolet Malibu | Position: Upstream Front
• 1999 Chevrolet Malibu | Position: Upstream Rear
• 1999-2002 Chevrolet Silverado 1500 | Position: Downstream Left
• 1999 Chevrolet Silverado 2500 | Position: Downstream Left
• 1999-2002 GMC Sierra 1500 | Position: Downstream Left
• 1999-2002 GMC Sierra 1500 | Position: Downstream Right
• 1999-2000 Oldsmobile Alero | Position: Upstream
• 1999-2000 Pontiac Montana | Position: Upstream
• 2002 Cadillac Escalade | Position: Downstream Right
• 2000 Chevrolet C3500 | Position: Downstream Left | Note: Non Calif-ESV
• 2000 Chevrolet C3500 | Position: Downstream Right | Note: Non Calif-ESV
• 2001 Chevrolet G30 | Position: Downstream Left
• 2001 Chevrolet G30 | Position: Downstream Right
• 2000 Chevrolet K2500 | Position: Downstream Left | Note: Non Calif-ESV
• 2000 Chevrolet K2500 | Position: Downstream Right | Note: Non Calif-ESV
• 2000 Chevrolet K3500 | Position: Downstream Left | Note: Non Calif-ESV
• 2000-2002 Chevrolet Silverado 1500 | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000-2002 Chevrolet Silverado 1500 | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000 Chevrolet Silverado 2500 | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000 Chevrolet Silverado 2500 | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000-2001 Chevrolet Suburban 2500 | Position: Downstream Right
• 2000-2002 Chevrolet Tahoe | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000 GMC C3500 | Position: Downstream Left | Note: Non Calif-ESV
• 2000 GMC C3500 | Position: Downstream Right | Note: Non Calif-ESV
• 2000-2002 GMC Yukon | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000-2002 GMC Yukon | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2001 Chevrolet Silverado 1500 HD | Position: Downstream Right
• 2001 GMC Sierra 1500 HD | Position: Downstream Right
• 2002 Cadillac Escalade EXT | Position: Downstream Left
• 2002 Chevrolet Avalanche 1500 | Position: Downstream Right | Note: Exc. Canada Built Vehicle
• 1996-1999 Cadillac Eldorado | Position: Upstream Front
• 1996-1999 Cadillac Eldorado | Position: Upstream Rear
• 1996-1997 Chevrolet Astro | Position: Downstream
• 1996-1999 Chevrolet C1500 | Position: Downstream Left
• 1996-1999 Chevrolet C1500 | Position: Downstream Right
• 1996-1999 Chevrolet C1500 Suburban | Position: Downstream Left
• 1996-2000 Chevrolet C2500 | Position: Downstream Left
• 1996-1999 Chevrolet C2500 Suburban | Position: Downstream Right
• 1996-2000 Chevrolet C3500 | Position: Downstream Left
• 1996-2000 Chevrolet C3500HD | Position: Downstream Left
• 1996-2000 Chevrolet C3500HD | Position: Downstream Right
• 1996-2002 Chevrolet Express 1500 | Position: Downstream Left
• 1996-2002 Chevrolet Express 1500 | Position: Downstream Right
• 1996-2002 Chevrolet Express 2500 | Position: Downstream Left
• 1996-2002 Chevrolet Express 2500 | Position: Downstream Right
• 1996 Chevrolet G30 | Position: Downstream Left
• 1996 Chevrolet G30 | Position: Downstream Right
• 1996-1999 Chevrolet K1500 | Position: Downstream Left
• 1996-1999 Chevrolet K1500 | Position: Downstream Right
• 1996-1999 Chevrolet K1500 Suburban | Position: Downstream Left
• 1996-1999 Chevrolet K1500 Suburban | Position: Downstream Right
• 1996-2000 Chevrolet K2500 | Position: Downstream Left
• 1996-1999 Chevrolet K2500 Suburban | Position: Downstream Right
• 1996-2000 Chevrolet K3500 | Position: Downstream Right
• 1996-2000 Chevrolet P30 | Position: Downstream
• 1996-1999 GMC C1500 | Position: Downstream Left
• 1996-1999 GMC C1500 | Position: Downstream Right
• 1996-1999 GMC C1500 Suburban | Position: Downstream Right
• 1996-1999 GMC C2500 Suburban | Position: Downstream Left
• 1996-2000 GMC C3500 | Position: Downstream Right
• 1996-1998 GMC K1500 | Position: Downstream
• 1996-2000 GMC K2500 | Position: Downstream Left
• 1996-2000 GMC K2500 | Position: Downstream Right
• 1996-1999 GMC K2500 Suburban | Position: Downstream Left
• 1996-1999 GMC K2500 Suburban | Position: Downstream Right
• 1996-2000 GMC K3500 | Position: Downstream Right
• 1996-1999 GMC P3500 | Position: Downstream Right
• 1996-2002 GMC Savana 1500 | Position: Downstream Left
• 1996-2002 GMC Savana 1500 | Position: Downstream Right
• 1996-2002 GMC Savana 2500 | Position: Downstream Left
• 1996-2002 GMC Savana 2500 | Position: Downstream Right
• 1996-2002 GMC Savana 3500 | Position: Downstream Left
• 1996-2002 GMC Yukon | Position: Downstream Right
• 1996-1999 Oldsmobile Aurora | Position: Upstream Front
• 1996-1999 Oldsmobile Aurora | Position: Upstream Rear
• 1997-2000 Buick Century | Position: Upstream
• 1997-2003 Buick LeSabre | Position: Upstream
• 1997-2003 Buick Park Avenue | Position: Upstream
• 1997-1999 Buick Riviera | Position: Upstream
• 1997-1998 Chevrolet Malibu | Position: Upstream
• 1997-2003 Chevrolet Monte Carlo | Position: Upstream
• 1997-2000 Chevrolet Venture | Position: Upstream
• 1997-1999 Oldsmobile 88 | Position: Upstream
• 1997-1999 Oldsmobile Cutlass | Position: Upstream
• 1997 Oldsmobile Cutlass Supreme | Position: Upstream
• 1997-1999 Oldsmobile LSS | Position: Upstream
• 1997-2000 Oldsmobile Silhouette | Position: Upstream
• 1997-2003 Pontiac Bonneville | Position: Upstream
• 1997-2000 Pontiac Grand Am | Position: Upstream
• 1998-2000 Chevrolet Camaro | Position: Upstream Left | Note: In Manifold, 4 Wire Sensor
• 1998-2000 Chevrolet Camaro | Position: Upstream Right | Note: In Manifold, 4 Wire Sensor
• 2000 Chevrolet Malibu | Position: Upstream
• 1998-2000 Chevrolet Tahoe | Position: Downstream Right
• 1998-2002 GMC Savana 2500 | Position: Downstream
• 1999-2000 Cadillac Escalade | Position: Downstream Left
• 1999-2002 Chevrolet Silverado 1500 | Position: Downstream Right
• 1999-2001 Chevrolet Silverado 2500 | Position: Downstream Right
• 1999-2000 GMC C3500HD | Position: Downstream
• 1999 GMC Sierra 2500 | Position: Downstream Left
• 1999-2001 GMC Sierra 2500 | Position: Downstream Right
• 2002 Cadillac Escalade | Position: Downstream Left
• 2001-2002 Chevrolet Camaro | Position: Upstream Left
• 2001-2002 Chevrolet Camaro | Position: Upstream Right
• 2000-2003 Chevrolet Impala | Position: Upstream
• 2000 Chevrolet K3500 | Position: Downstream Right | Note: Non Calif-ESV
• 2000-2002 Chevrolet Suburban 1500 | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000-2002 Chevrolet Suburban 1500 | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000-2002 Chevrolet Tahoe | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000 GMC K2500 | Position: Downstream Left | Note: Non Calif-ESV
• 2000 GMC K2500 | Position: Downstream Right | Note: Non Calif-ESV
• 2000 GMC K3500 | Position: Downstream Left | Note: Non Calif-ESV
• 2000 GMC K3500 | Position: Downstream Right | Note: Non Calif-ESV
• 2000-2002 GMC Sierra 1500 | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000-2002 GMC Sierra 1500 | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000 GMC Sierra 2500 | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000 GMC Sierra 2500 | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000-2002 GMC Yukon XL 1500 | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2000-2002 GMC Yukon XL 1500 | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2000-2001 GMC Yukon XL 2500 | Position: Downstream Right
• 2001-2002 Pontiac Firebird | Position: Upstream Left
• 2001-2002 Pontiac Firebird | Position: Upstream Right
• 2001 Chevrolet Silverado 2500 HD | Position: Downstream Right
• 2001 Chevrolet Silverado 3500 | Position: Downstream Right
• 2001 GMC Sierra 2500 HD | Position: Downstream Right
• 2001 GMC Sierra 3500 | Position: Downstream Right
• 2001-2002 GMC Yukon XL 1500 | Position: Downstream Right
• 2002 Cadillac Escalade | Position: Downstream Left | Note: Exc.Canada Built Vehicle
• 2002 Cadillac Escalade | Position: Downstream Right | Note: Exc.Canada Built Vehicle
• 2002 Cadillac Escalade EXT | Position: Downstream Right
• 2002 Chevrolet Avalanche 1500 | Position: Downstream Left | Note: Exc. Canada Built Vehicle
• 2002 GMC Yukon XL 1500 | Position: Downstream Left