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Recommended Supporting Mods (with SKUs)

  • FPE-HFFL-1018 – ½″ High-Flow Feed-Line Kit to keep the CP3 fed at high RPMs.
  • FPE-CUMM-CP3K-6.7 – CP3K High-RPM Pump to hold rail pressure past 3 000 RPM.
  • 4″-5″ turbo-back exhaust and custom EFI-Live tuning (brand/SKU varies per system).

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

Part Number FPE-LML-CP3-WP
Pump Type LBZ/LMM-spec Bosch CP3
Emissions Cert. CARB EO D-834-1 • SEMA SC-FLC01-0013
Tuning Required No
Warranty 1-Year Limited
Shipping Weight ≈ 25 lb

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.
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Part: FPE-TIERODSLEEVES-COL

Problem: The original equipment steering tie rods are prone to collapse under heavy load, making them highly sucsceptible when running larger diameter tires or high offset wheels.

Fix: The Fleece Performance tie rod sleeves keep the weak factory tie rods from bending under the added stress of lifted torsion bars, increased horsepower and torque, and aggressive tires.

Fitment:

  • 2015-Present GMC Canyon/GM Colorado
  • 2017-Present GM Colorado ZR2
  • Designed for use in conjunction with GM tie-rod 22966604 and 84344235

 

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Part: FPE-PF-GM-0104

The LB7 PowerFlo lift pump is the latest OEM replacement performance lift pump from the diesel experts at Fleece Performance. Direct OEM In-Tank Replacement: The PowerFlo Lift Pump retains the factory fuel lines and installs in less than half the time of other high flow lift pumps. 

OEM Quality: New sending unit electronics and fuel level float will get your fuel gauge working correctly again!
Seamless Integration: The active fill bucket eliminates the need for tank sumps, draw straws, additional air filtration, and the 1/4 tank issues typically encountered when seeking a higher flow lift pump to meet your engine’s need. 

Aftermarket Capable: Want the benefits of the in-tank pump but need to run your own fuel lines or aftermarket filters?  The pump outlet and return is threaded to accept a -8 O-ring fitting (3/4 inch-16 thread). 

Replaces GM OE Part: AC Delco 89060639

Notes
For use on pickup style trucks only – for cab & chassis verify your pump P/N to the cross-reference table.

 

2001,2002,GMC,Sierra 2500 HD,SL|2001,2002,GMC,Sierra 3500,SL|2001,2004,GMC,Sierra 3500,SLE|2001,2004,GMC,Sierra 2500 HD,SLE|2001,2004,GMC,Sierra 3500,SLT|2001,2004,GMC,Sierra 2500 HD,SLT|2002,2004,GMC,Sierra 2500 HD,|2002,2004,GMC,Sierra 3500,|2003,2004,GMC,Sierra 2500 HD,WT|2004,2004,GMC,Sierra 3500,WT

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Fleece CP3 Conversion Hardware Kit (Pump‑Less) | 2011‑2016 LML Duramax

Replace the failure‑prone CP4 without the cost of a full fuel‑system overhaul. This hardware‑only kit supplies every OEM‑quality line, fitting, bracket, and harness you need to install a CP3 in your 2011‑2016 LML Duramax-just add the pump of your choice. You’ll gain the proven reliability and greater flow capacity of the CP3 while keeping full 50‑state emissions compliance (CARB EO D834‑1, SEMA SC‑FLC01‑0013) and avoiding expensive ECM retunes.

Key Features

  • High‑flow CP3 feed & return fittings for unrestricted supply and return.
  • Pre‑formed feed, return, and valley lines-no cutting or flare tools required.
  • CP3 mounting adapter with dosing‑injector & fuel‑temp‑sensor provisions.
  • FCA regulator extension harness-no wire splicing.
  • 50‑state legal hardware; no FCA table changes needed when using a stock CP3.

Kit Contents

  • CP3‑to‑rail high‑pressure fuel line
  • High‑flow CP3 feed & return fittings
  • Pre‑formed low‑ & high‑pressure feed/return lines, plus valley feed line
  • CP3 mounting adapter & hardware
  • Dosing‑injector feed line
  • FCA extension harness
  • Fuel‑temperature sensor mounting bracket
  • Comprehensive hardware pack

Vehicle Fitment

Fits all 2011‑2016 Chevrolet Silverado & GMC Sierra 2500/3500 HD 6.6 L LML Duramax trims (WT, LT, LTZ, High Country, SLE, SLT, Denali).

Recommended Supporting Parts

  • FPE‑LML‑CP3‑WP – Bosch CP3 Pump Kit (complete with pump).
  • FPE‑34563 – PowerFlo In‑Tank Lift Pump (Short‑Bed) for consistent supply pressure.
  • FPE‑34564 – PowerFlo In‑Tank Lift Pump (Long‑Bed) for the same 800 HP support.
  • Custom EFI‑Live or HP Tuners calibration to optimize rail pressure.

Installation Notes

Plan 4‑6 hours with basic hand tools. Purge the fuel system thoroughly before start‑up. When paired with a stock CP3, no ECM fuel‑pressure table changes are required.

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