**open box as shown HQPASFY NOx Sensor 12669594 5WK96631H Inlet Upstream Nitrogen Oxide Sensor Compatible with Chevy Express Silverado, GMC Savana Sierra 2500 3500 4500 6.6L Diesel Replace# 19256343 904-422 Fits For: CHEVROLET EXPRESS 2500 2010-2015 6.6L V8 DIESEL Turbocharged CHEVROLET EXPRESS 3500 2010-2015 6.6L V8 DIESEL Turbocharged CHEVROLET EXPRESS 4500 2010-2015 6.6L V8 DIESEL Turbocharged CHEVROLET SILVERADO 2500 2011-2014 6.6L V8 DIESEL Turbocharged CHEVROLET SILVERADO 3500 2011-2014 6.6L V8 DIESEL Turbocharged GMC SAVANA 2500 2010-2015 6.6L V8 DIESEL Turbocharged GMC SAVANA 3500 2010-2015 6.6L V8 DIESEL Turbocharged GMC SAVANA 4500 2010-2015 6.6L V8 DIESEL Turbocharged GMC SIERRA 2500 2011-2014 6.6L V8 DIESEL Turbocharged GMC SIERRA 3500 2011-2014 6.6L V8 DIESEL Turbocharged About this item ?COMPATIBLE VEHICLES?Compatible with 2010-2014 Chevrolet Express 2500 3500 45200 6.6L, 2011-2014 Chevrolet Silverado 2500 3500 6.6L, 2010-2014 GMC Savana 2500 3500 4500 6.6L, 2011-2014 GMC Sierra 2500 3500 6.6L. Replace OE Number:5WK9 6631H, 12669594, 12671387, 19256343, 4N1001, 19301328, 5WK96631H, 904-422. Please confirm that the item matches your car before purchasing ?OE STANDARD?Engineered to OE standards, our nitrogen oxide sensors use premium materials and exceptional craftsmanship. Each nox sensor undergoes rigorous quality testing for reliable performance. Easy to replace, they ensure your vehicle runs smoothly ?FEARLESS CHALLENGES?Designed to withstand soot buildup, ECU water ingress, and cable damage, our nitrogen oxygen sensors deliver long-lasting, stable, and accurate readings in harsh environments. Keep your engine running optimally and enhance your driving experience ?ACCURATE MEASUREMENT?Our nitrogen oxygen sensors precisely monitors engine emissions with a fast response, aiding the control system in reducing tailpipe emissions and optimizing fuel supply for improved combustion. Enhance your driving experience with this reliable helper