Walker 350-34966 Oxygen Sensor

Walker 350-34966 Oxygen Sensor Overview

Walker Products 350-34966 is a heated oxygen sensor built as a specific-fit OE replacement for a wide range of GM vehicles. It is engineered for the exact application and mounting position, helping the ECU receive the feedback it expects from the exhaust system.

Use this Walker Products Aftermarket sensor for downstream or upstream service on select Chevrolet, GMC, Buick, and Cadillac models, including Silverado 1500, Sierra 1500, Tahoe, Yukon, and Regal Sportback applications.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific-fit application for the listed vehicle and sensor position
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for proper harness connection
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 11.34 in.; overall length: 14.88 in.

Product Details

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as OE-style replacements for worldwide vehicle applications. Part number 350-34966 is built to match the required fitment position and provide the diagnostic feedback the ECU relies on for fuel control and emissions monitoring. The Walker Products Aftermarket line focuses on application-specific coverage for modern engine management systems, making this sensor a direct replacement choice for service work on vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac CTS.

This part cross-references Walker Products 350-34966 for the same application.

What It Helps Address

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

Installation Notes

Confirm the exact year, make, model, and sensor position before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect readings. This threaded, heated sensor is position-specific, so matching the upstream or downstream location is important for proper operation.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 350-34966 is produced as an OE replacement sensor for the listed applications and built to support the diagnostic requirements of the vehicle ECU.