Genuine GM Valve Part# 13596856 Genuine Oem:Yes, Category 2:Cab, Superseded Part Number:15196388, Part Ref# On Diagram:ONLY PART REFERENCE #3 ON THE DIAGRAM IS Brand:GM, Fitment Type:Direct Replacement, Other Part Number:15196388, 25809298, 15927977, 15053675, Category 1:Body Hardware Manufacturer Part Number:13596856, Category 3:Back Panel, Item Name:Vent Valve, Placement On Vehicle:Rear