Photo 1 of HQPASFY 5WK96645H 5WK96631H Inlet & Outlet NOx Sensor 12671387 12671388 Nitrogen Oxide Sensor Compatible with Chevy Express Silverado, GMC Savana Sierra 2500 3500 4500 6.6L Diesel

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Photo 1 of HQPASFY 5WK96645H 5WK96631H Inlet & Outlet NOx Sensor 12671387 12671388 Nitrogen Oxide Sensor Compatible with Chevy Express Silverado, GMC Savana Sierra 2500 3500 4500 6.6L Diesel