1999437 BULB 2.727 Genuine Oem:Yes, Category 2:Chassis Electrical, Item Name:Headlamp Bulb, Category 1:Electrical Brand:GM, Fitment Type:Direct Replacement, Part Ref# On Diagram:ONLY PART REFERENCE #6 ON THE DIAGRAM IS Manufacturer Part Number:1999437, Category 3:Bulbs, Quantity Needed:1