CP3 Pumps

Maintain consistent rail pressure, eliminate fuel starvation, and supply the heavy volume of fuel your engine demands on your 2007.5–2010 Chevy Silverado or GMC Sierra 2500HD/3500HD with our selection of LMM Duramax CP3 pumps. The 6.6L LMM relies on the robust Bosch CP3 high-pressure injection pump, which is highly durable from the factory. However, after hundreds of thousands of miles of heavy towing, wear from ultra-low sulfur diesel, or exposure to contaminated fuel, the factory CP3 can eventually weaken. A failing pump leads to a dangerous loss of rail pressure, extended crank times, and frustrating limp mode triggers under heavy loads. Furthermore, if you are upgrading to larger injectors and aggressive custom tuning, the factory CP3 simply cannot flow enough fuel to maintain pressure, effectively choking your horsepower potential. Whether you need a brand-new or remanufactured stock Bosch CP3 to restore factory reliability, or a high-performance "stroker" pump—such as a 10mm or 12mm CP3—to support extreme horsepower and competition builds, we have the perfect fueling solution. We proudly supply premium injection pumps and comprehensive CP3 upgrade kits from trusted industry leaders like genuine Bosch, Exergy Performance, Fleece Performance, S&S Diesel Motorsport, and BD Diesel. Browse our complete inventory of 6.6L LMM Duramax CP3 pumps below to lock in relentless fuel delivery and maximize your engine's performance.