Genuine GM 15201921 High Mount Stop Lamp Genuine Oem:Yes, Category 2:Rear Lamps, Superseded Part Number:15000045, Item Name:High Mount Brake Light, Category 1:Electrical Brand:GM, Fitment Type:Direct Replacement, Other Part Number:15000045, Part Ref# On Diagram:ONLY PART REFERENCE #1 ON THE DIAGRAM IS, Placement On Vehicle:Rear Manufacturer Part Number:15201921, Category 3:High Mounted Stop Lamp, Alternate Item Name:High Mount Brake Light, Quantity Needed:1