13577379 Sensor 3.682 Genuine Oem:Yes, Category 2:Emission System, Fitment Footnotes:Diag Ref #4, Item Name:Sensor, Category 1:Emission System Brand:GM, Fitment Type:Direct Replacement, 3.6 Liter:3.6 Liter, Part Ref# On Diagram:ONLY PART REFERENCE #4 ON THE DIAGRAM IS Manufacturer Part Number:13577379, Category 3:Emission Components, Flex Fuel:Flex Fuel, Quantity Needed:1