Pollak 66-004 – 2015 GM Upstream Diesel Nitrogen Oxide (NOx) Sensor (Position 1)

Precision Emissions Monitoring for 2015 GM Duramax Engines
Maintain your vehicle's peak performance and environmental compliance with the Pollak 66-004 Upstream Nitrogen Oxide (NOx) Sensor. Designed specifically for 2015 Chevrolet and GMC trucks equipped with the 6.6L Duramax Diesel (LML) engine, this sensor is located "upstream" in the exhaust downpipe. It provides critical, real-time data to the Engine Control Module (ECM) to regulate Diesel Exhaust Fluid (DEF) injection and ensure the Selective Catalytic Reduction (SCR) system is operating at maximum efficiency.

Key Features & Benefits:

• Direct OE Replacement: Built to the exact specifications of GM part numbers 19301328 and 19302359.

• Plug-and-Play Installation: Designed for a perfect fit into the factory wiring harness with no specialized programming required after a standard reset procedure.

• Durable Construction: Engineered to withstand high temperatures and the vibration-heavy environment of a diesel exhaust downpipe.

• Fuel Efficiency & Compliance: Helps clear emissions-related "limp mode" conditions and P229F/U029E trouble codes.

Product Specifications:

• Position: Upstream (Position 1 / Pre-SCR)

• Connector Shape: Square

• Terminal Quantity: 6-Pin

• Terminal Type: Pin (Male)

• Brand: Pollak Aftermarket