View 4 Photos View 0 Videos Peterbilt Left Front Door Glass for a Peterbilt 379 $190 USD R44-6021 GLASS-DOOR DROP WINDOW REPLACES OLD# 20-6021, INCLUDES 20-18282 CHANNEL-GLASS Quantity2ConditionUsedFits To Make(s)PETERBILTFits To Model(s)379SideLeftStock Number115172 MLS Number13614905CategoryDoor Glass, Front Last Updated5/23/2026 LocationSalt Lake City, UT, US Sold ByVriens Truck Parts (801) 478-___ SHOWNUMBERCall Seller Email Seller Save More Info