CP3 Pumps

Restore factory reliability, cure low rail pressure codes, or fuel your high-horsepower build on your 2006–2007 Chevy Silverado or GMC Sierra 2500HD/3500HD with our selection of LBZ Duramax CP3 injection pumps. The gear-driven CP3 pump is the heart of the 6.6L LBZ common-rail fuel system, responsible for generating the extreme pressures required for proper atomization. Over high mileage, internal wear can cause the factory pump to lose its ability to maintain adequate rail pressure, resulting in a rough idle, sluggish throttle response, and frustrating P0087 trouble codes—especially when pushed with aggressive aftermarket tuning or heavy towing. Whether you need a genuine OEM Bosch replacement to restore your daily driver to factory specifications, or a high-flow stroked CP3 (such as a 10mm or 12mm variant) to support oversized injectors and a larger turbocharger, we have the perfect fueling solution. We supply brand-new, premium remanufactured, and heavily modified high-performance CP3 pumps from trusted industry leaders like Bosch, Fleece Performance, S&S Diesel Motorsport, and Exergy Performance. Browse our complete inventory of 6.6L LBZ CP3 injection pumps below to deliver the precise, high-pressure fuel your Duramax demands.