2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Injection Pumps

The stock CP3 fuel injection pump on your 2001-2004 GM 6.6L Duramax is adequate for everyday use, but it falls short for the heavy-duty tasks you have in mind. Our upgraded injection pumps provide superior performance for towing, off-roading, and hauling by improving fuel flow and pressure, resulting in better throttle response, increased power, and more efficient fuel combustion. These pumps are essential for maintaining engine reliability and performance, especially in tough conditions. Upgrade your Sierra/Silverado's fuel system with our premium replacement or upgraded CP3 pumps, available at Alligator Performance! Check out our full selection of Fuel Upgrades!  GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.