Fleece CP3 Conversion Kit w/ Pump | 2011-2016 LML Duramax

Fleece CP3 Conversion Kit w/ Pump | 2011-2016 LML Duramax

Bullet-proof your LML’s fuel system by replacing the failure-prone CP4 with Fleece’s brand-new Bosch CP3 conversion. The CP3 is proven to out-flow and out-live the CP4, and this complete, 50-state-legal kit installs with no tuning required, restoring reliability while supporting future power goals.

Key Benefits

• New Bosch CP3 included – OE-grade pump, zero core charge.
• Molded feed & return hoses – Fleece-exclusive lines for a leak-free, factory-fit install.
• High-flow CP3 fittings – maximize supply volume for stock or aftermarket lift pumps.
• No ECM flash needed – truck starts and idles like stock the moment you’re done.
• 50-state emissions-legal – CARB EO D-834-1 & SEMA SC-FLC01-0013.

What’s in the Box

• Brand-new Bosch CP3 pump
• CP3-to-rail high-pressure line
• Pre-formed feed & return hoses + valley feed line
• High-flow CP3 inlet & return fittings
• CP3 mounting adapter & hardware
• Dosing-injector lines, regulator harness extension, temp-sensor bracket

Vehicle Fitment

Fits all 2011-2016 Chevrolet Silverado & GMC Sierra 2500/3500 HD LML 6.6 L Duramax trims (WT, LT, LTZ, High Country, SLE, SLT, Denali).
Not for Cab/Chassis or L5P/LM2 engines.

Technical Specs

Recommended Supporting Mods (with SKUs)

• FPE-34563 – PowerFlo In-Tank Lift Pump (Short-Bed trucks) for positive CP3 supply pressure.
• FPE-34564 – PowerFlo In-Tank Lift Pump (Long-Bed trucks) to support up to 800 HP builds.
• Clean fuel filtration upgrade (Aux. Heated Filter Kit, SKU varies) for maximum injector life.