Engineered specifically for street performance and towing applications on 2001 through 2010 Chevrolet Silverado and GMC Sierra 2500HD/3500 trucks powered by the 6.6L Duramax V8 turbo diesel engine (LB7, LLY, LBZ, and LMM platforms), the Fleece Performance CP3K Modified High-Pressure Pump (Part # FPE-DMAX-CP3K) is built to eliminate the natural fuel flow drop-off that factory stock pumps experience above 3,000 RPM.

Based on an enhanced LBZ pump architecture, the CP3K ensures commanded fuel rail pressure remains steady throughout the entire upper RPM range. Delivered as a brand-new unit requiring no core deposit or return, it provides an affordable, high-reliability upgrade supporting up to 650 horsepower.

Key Features & Benefits

• Eliminates High-RPM Restrictions: Prevents the severe fuel flow and rail pressure crash experienced by stock pumps past 3,000 RPM.
• Supports up to 650 Horsepower: Provides reliable volumetric output for mild tuning, towing upgrades, and enhanced throttle response.
• 100% Brand-New Bosch Construction: Built using brand-new components to guarantee maximum structural reliability and cleanliness.
• Zero Core Charge: Outright performance pump requiring no core deposit or core return shipping.
• Maintains Desired Rail Pressure: Ensures consistent high-pressure fuel atomization for optimal combustion efficiency.

Technical Specifications

• Manufacturer / Brand: Fleece Performance Engineering
• Manufacturer Part Number / SKU: FPE-DMAX-CP3K
• Product Type: Modified High-Pressure Common Rail CP3 Injection Pump
• Performance Rating: Proven to support up to 650 Wheel Horsepower (RWHP)
• Truck Compatibility: 2001–2010 GM 2500HD / 3500 Silverado & Sierra
• Engine Platform: 6.6L Duramax V8 Turbo Diesel (LB7, LLY, LBZ, and LMM)
• Core Requirement: None
• Warranty: Fleece Performance Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2001–2004 GM 2500HD / 3500 Duramax 6.6L (LB7 – requires fuel pressure regulator scaling / custom tuning)
• 2004.5–2005 GM 2500HD / 3500 Duramax 6.6L (LLY – requires fuel pressure regulator scaling / custom tuning)
• 2006–2007 GM 2500HD / 3500 Duramax 6.6L (LBZ Classic)
• 2007.5–2010 GM 2500HD / 3500 Duramax 6.6L (LMM)
• Installation Tip: Ensure the fuel system is completely flushed and free of metallic debris. Pair with an upgraded 150+ GPH lift pump system to maintain proper inlet supply pressure.