Walker 350-33051 Oxygen Sensor - Upstream

Walker 350-33051 Oxygen Sensor Overview

Walker Products 350-33051 is a heated upstream oxygen sensor built as a specific-fit OE replacement for select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on vehicles such as the Chevrolet Tahoe, GMC Yukon, and Chevrolet C1500.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed upstream position
• 3-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• 10.35 wiring harness length and 13.9 overall length
• Radiused polygon connector shape for application-specific fitment
• Walker Products Aftermarket engine management sensor line

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed as direct replacements for original equipment applications. Part number 350-33051 is designed for the upstream location and is used on a range of 1993, 1995, and 1996 vehicles, including the Buick Park Avenue and Regal, Chevrolet Astro, C1500, K1500, Tahoe, GMC Safari, Yukon, and related full-size truck and van platforms. This sensor supports the diagnostic feedback the ECU relies on to manage air-fuel ratio, emissions output, and drivability.

This part number, 350-33051, is a practical choice when replacing a failed upstream oxygen sensor on vehicles that show fault codes, poor fuel economy, rough running, or an illuminated malfunction indicator light. Walker Products has supplied engine management components since 1946 and manufactures application-specific sensors for the listed fitments.

What It Can Help Address

• Check engine light related to upstream oxygen sensor performance
• Rough idle or poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust readings
• Higher exhaust emissions from a failing heated O2 sensor
• Stored ECU fault codes tied to the sensor or its circuit

Installation Notes and Fitment

Compatible With select upstream applications only. Fits 1993 Buick Park Avenue, upstream; 1993 Buick Regal, upstream; 1993 Chevrolet Lumina APV, upstream; 1993 Oldsmobile 98, upstream; 1993 Oldsmobile Silhouette, upstream; 1993 Pontiac Trans Sport, upstream; 1995 Chevrolet Astro, upstream; 1995 Chevrolet C1500, upstream; 1995 Chevrolet C1500 Suburban, upstream; 1995 Chevrolet C2500, upstream; 1995 Chevrolet C2500 Suburban, upstream; 1995 Chevrolet G10, upstream; 1995 Chevrolet G20, upstream; 1995 Chevrolet K1500, upstream; 1995 Chevrolet K1500 Suburban, upstream; 1995 Chevrolet K2500, upstream; 1995 Chevrolet K2500 Suburban, upstream; 1995 Chevrolet Tahoe, upstream; 1995 GMC C1500, upstream; 1995 GMC C1500 Suburban, upstream; 1995 GMC C2500, upstream; 1995 GMC C2500 Suburban, upstream; 1995 GMC G1500, upstream; 1995 GMC G2500, upstream; 1995 GMC G3500, upstream; 1995 GMC K1500, upstream; 1995 GMC K1500 Suburban, upstream; 1995 GMC K2500, upstream; 1995 GMC K2500 Suburban, upstream; 1995 GMC Safari, upstream; 1995 GMC Yukon, upstream; 1996 Chevrolet G30, upstream; 1996 GMC G3500, upstream.

Before installation, inspect the sensor wiring harness and connector for damage and verify the threaded mounting location matches the vehicle application. This part cross-references Bosch (e.g., 13275) for the same application.

Quality Assurance

Walker Products manufactures engine management sensors under ISO 9001 and TS 16949 quality systems, with application-specific fitment and ECU feedback requirements in mind. Part number 350-33051 is built for the listed upstream oxygen sensor applications and follows Walker Products Aftermarket OE-replacement standards.