8 1 Isuzu Engine for a 2004 GMC C5500 $4,750 USD (Used) 2003 ISUZU 8GF1SX, ENGINE ASSEMBLY- LRM PREFIX ISUZU, 6.6L, 300 GROSS HP @ 3250 RPM 6.6L ISUZU 300 HP PWR OPTION(LRM) Family Number: 3SZXH06.64RA, Displacement: 6.6L, Horsepower: 300... ConditionUsedCPL/ARRLRM PREFIXHorse Power300 HPFits To Make(s)GMCFits To Model(s)C5500Will Fit Year(s)2004Part Number8973187970Stock NumberP-47921 MLS Number12058802CategoryEngines Last Updated10/28/2025 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info