Delphi ES20022 Oxygen Sensor - Front

Delphi ES20022 Oxygen Sensor for GM Front Applications

Delphi ES20022 is a heated oxygen sensor built for front-position exhaust monitoring on select Cadillac, Chevrolet, and GMC trucks and SUVs. It uses a 4-wire design with a flat connector and 18 x 1.5 mm thread size for direct replacement service on listed applications.

Key Features

• Heated oxygen sensor for front exhaust placement
• 4-wire configuration with flat connector shape
• 18 x 1.5 mm thread size for listed GM applications
• Overall length: 375.0
• Package contents: oxygen sensor and instruction sheet
• Delphi OE heritage backed by 100 years of original equipment experience

Detailed Description

The Delphi ES20022 oxygen sensor is engineered for front sensor locations on 1999-2002 Chevrolet Silverado 1500, 1999-2002 GMC Sierra 1500, 2000-2002 Chevrolet Suburban 1500, 2000-2002 Chevrolet Tahoe, 2000-2002 GMC Yukon, 2000-2002 GMC Yukon XL 1500, 2000-2002 Chevrolet Silverado 2500, 2000-2002 GMC Sierra 2500, and 2002 Cadillac Escalade and Chevrolet Avalanche 1500 applications listed in the fitment data. Delphi draws on OE supplier experience to build aftermarket parts with the same application knowledge used in original equipment development. This part cross-references DENSO Auto Parts 234-4012 and Bosch 13026 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn front sensor
• Slow sensor response during closed-loop operation
• Emissions test failures tied to front O2 sensor faults
• Rough fuel control caused by inaccurate exhaust readings

Installation Notes and Tips

Verify the front sensor location, connector style, wire count, and thread size before installation. Confirm vehicle build notes in the fitment data, including Canada-built exclusions and the 50-inch length note on select 2002 Cadillac Escalade and Chevrolet Avalanche 1500 applications. Inspect the exhaust bung threads and wiring routing before tightening the sensor.

Quality Assurance

Delphi builds this oxygen sensor using OE-focused engineering knowledge developed through decades of supplying original equipment to major automakers. That heritage supports consistent fitment and sensor design for the listed GM front applications.