View 0 Photos View 0 Videos 2004 GMC 6.6L DURAMAX Engine for a GMC C5500 $6,925 USD (USED) GM 6.6L DURAMAX Warranty: 180 Day Parts Only Assembly#: VERIFY Serial#: VERIFY Horsepower: 300 ConditionUsedAssembly NumberVERIFYFits To Make(s)GMCFits To Model(s)C5500Stock Number25927790 MLS Number14164074CategoryEngines Last Updated2/26/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info