Engineered specifically for 2001 through 2016 Chevrolet Silverado and GMC Sierra 2500HD/3500 trucks powered by the 6.6L Duramax V8 turbo diesel engine (LB7, LLY, LBZ, LMM, and LML generations), the Fleece Performance Billet Aluminum CP3 Adapter Kit (Part # FPE-DMAX-CP3-ADPT) provides an upgraded, heavy-duty replacement for factory or conversion CP3 pump mounting plates.

Whether performing routine high-pressure fuel pump maintenance on 2001–2010 models or executing a reliable CP3 conversion kit installation on 2011–2016 LML platforms, factory cast brackets can become brittle, pitted, or prone to seal leaks over time. Fleece precision-machines each adapter from solid billet aluminum for superior structural strength and corrosion resistance. Packaged complete with brand-new O-rings for the CP3 pump snout and adapter flange, this kit installs seamlessly with zero core charge.

Key Features & Benefits

• Precision Billet Aluminum Construction: CNC-machined from solid aluminum barstock to eliminate the weaknesses and porosity found in factory cast components.
• Complete O-Ring Seal Set: Includes brand-new, high-temperature replacement O-rings for both the CP3 pump snout and adapter flange to guarantee leak-free sealing.
• Versatile Application Range: Direct OE replacement for 2001–2010 LB7, LLY, LBZ, and LMM trucks, and acts as the essential adapter component for 2011–2016 LML CP3 conversion kits.
• Corrosion & Fatigue Resistant: Built to withstand constant engine vibration, thermal expansion, and high-pressure fuel pulsation.
• Zero Core Charge: Brand-new outright performance replacement component requiring no core deposit or core return shipping.

Technical Specifications

• Manufacturer / Brand: Fleece Performance Engineering
• Manufacturer Part Number / SKU: FPE-DMAX-CP3-ADPT
• Product Type: CP3 Injection Pump Mounting Adapter Flange
• Material Composition: Solid Billet Aluminum
• Included Components: Billet CP3 Adapter Plate, CP3 Snout O-Ring, and Adapter Flange O-Rings
• GM OE Part Number Interchanges: 97328578 / 97188692
• Truck Compatibility: 2001–2016 GM 2500HD / 3500 Silverado & Sierra
• Engine Platform: 6.6L Duramax V8 Turbo Diesel (LB7, LLY, LBZ, LMM, and LML)
• Core Requirement: None
• Warranty: Fleece Performance Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2001–2004 GM 2500HD / 3500 Duramax 6.6L (LB7)
• 2004.5–2005 GM 2500HD / 3500 Duramax 6.6L (LLY)
• 2006–2007 GM 2500HD / 3500 Duramax 6.6L (LBZ Classic)
• 2007.5–2010 GM 2500HD / 3500 Duramax 6.6L (LMM)
• 2011–2016 GM 2500HD / 3500 Duramax 6.6L (LML – for CP3 conversion installations)
• Installation Tip: Disconnect the negative battery cables and relieve all fuel system pressure. Clean the timing cover mounting surface meticulously. Lightly lubricate the new O-rings with clean engine oil or diesel fuel before seating them into the Fleece billet adapter to prevent pinching during torque-down.