Walker 350-34412 Oxygen Sensor

Walker 350-34412 Oxygen Sensor Overview

Walker Products 350-34412 is a heated oxygen sensor built as a specific-fit OE replacement for a wide range of GM, Cadillac, Buick, Pontiac, Isuzu, Honda, and Oldsmobile applications. It is engineered to deliver the ECU feedback needed for accurate fuel control, emissions monitoring, and fault-code diagnosis.

Compatible With 2000-2013 vehicles across upstream and downstream positions, this sensor is a direct-fit solution for many Chevrolet Silverado 1500, GMC Sierra 1500, and related applications. The Walker Products Aftermarket line focuses on application-specific engine management sensors for precise fitment and reliable signal output.

• Heated oxygen sensor for faster operating temperature and stable feedback
• Specific-fit design for the listed vehicle, engine, and sensor position
• 4-wire configuration with female radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 13.31 in.; overall length: 16.85 in.
• Supports ECU monitoring for air-fuel ratio and emissions control

Application Details and Fitment

This Walker 350-34412 oxygen sensor is listed for upstream right, upstream left, upstream front, upstream rear, downstream right, downstream left, downstream, and upstream positions depending on the vehicle. Fits 2001-2013 Chevrolet Silverado 2500, upstream right; Fits 2000 Chevrolet Silverado 2500, upstream right, upstream left, downstream right, and downstream left for Canada-built vehicles; Fits 2007-2013 GMC Sierra, upstream right; Fits 2000-2002 GMC Sierra 2500, upstream right, upstream left, downstream right, and downstream left for Canada-built vehicles.

Additional confirmed applications include Fits 2002-2005 Chevrolet Blazer, upstream right, upstream left, downstream right, and downstream left; Fits 2001-2005 Buick Century, upstream; Fits 2001-2005 Pontiac Grand Am, upstream; Fits 2000-2004 Cadillac DeVille, upstream front and upstream rear; and Fits 2002-2004 Isuzu Rodeo, upstream right, upstream left, downstream right, and downstream left.

This part cross-references Bosch 15717 and Denso 234-9005 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Higher fuel consumption from inaccurate air-fuel correction
• Increased exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the exact year, make, model, and sensor position before ordering. This sensor uses a threaded mount and a female connector, so match the connector shape and wire count to the original unit. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion before installation, since damaged wiring can shorten sensor life and affect signal quality.

For best results, replace the sensor in the correct upstream or downstream location specified for the vehicle. On applications such as Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Tahoe, verify whether the vehicle is Canada-built and whether the required position is left, right, front, rear, or downstream.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures this oxygen sensor as an OE-style replacement for the listed applications. The brand operates under Automotive ISO9001/TS 16949 quality standards and builds each part number for specific fitment and ECU feedback requirements.