View 5 Photos View 0 Videos 2006 GMC 6.6L DURAMAX Engine for a GMC C4500 Price Drop $5,885 USD (USED) GM 6.6L DURAMAX Warranty: 180 Day Parts Only Assembly#: - Serial#: 6GMXH06.6591 Horsepower: 300 DOES NOT INCLUDE AIR TRANSFER TUBE AND FRONT MOTOR MOUNTS, STEERING PUMP, ALT BRACKET ConditionUsedAssembly Number-Fits To Make(s)GMCFits To Model(s)C4500Stock Number25380221 MLS Number11880070CategoryEngines Last Updated2/8/2026 LocationSioux Falls, SD, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info