Walker 350-34661 Oxygen Sensor

Walker 350-34661 Oxygen Sensor for GM Trucks and Vans

Walker Products 350-34661 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Chevrolet and GMC applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping restore proper air-fuel monitoring on vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Express van platforms.

Key Features

• Heated oxygen sensor with 4-wire design for accurate exhaust feedback
• Specific-fit application for the correct mounting position
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 12.32; overall length: 15.87
• Walker Products Aftermarket line for engine management and oxygen sensor replacement

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as replacement parts for a wide range of vehicles. Part number 350-34661 is built for specific fitment positions, including upstream left, upstream right, downstream left, and downstream right applications across select 2002-2007 Chevrolet and GMC models. This oxygen sensor is a practical replacement when the original sensor is no longer providing reliable ECU feedback, especially on GM trucks and vans that rely on precise emissions monitoring.

Compatible vehicle coverage includes fitments such as the Chevrolet Express 1500, Chevrolet Silverado 1500, GMC Savana 2500, and GMC Yukon. For shoppers searching long-tail terms like “2003 Chevrolet Silverado 1500 upstream left oxygen sensor” or “2007 GMC Savana 1500 downstream left O2 sensor,” this part number is matched to the listed position and engine-management application.

This part cross-references Bosch 15717 and Denso 234-4661 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Confirm the exact year, make, model, and sensor position before ordering.
• Match the sensor location carefully: upstream or downstream, left or right.
• Inspect the wiring harness and connector for damage before installation.
• Check the exhaust bung threads and sensor mounting area for corrosion or contamination.
• Use the vehicle’s ECU fault codes and service information to verify the correct bank and sensor position.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. Part number 350-34661 is manufactured for the specified application and position to support the diagnostic feedback required by the vehicle ECU.