View 1 Photo View 0 Videos 2004 Peterbilt 387 Heater Core Box Recently Updated $595 USD GOOD USED HEATER CORE BOX ASSEMBLY MOUNTS AT THE CENTER OF THE CAB UNDER THE HOOD, Material: Other ConditionUsedFits To Make(s)PeterbiltFits To Model(s)387Will Fit Year(s)2004Stock Number50517-30 MLS Number9141808CategoryHeater Core Boxes Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info