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USD 769
Part #: FPE-34563

Fleece FPE-34563 PowerFlo In-Tank Lift Pump

Vehicle Fitment:
2011-2016 GM 6.6L Duramax LML (Short Bed) | See full application list below
Part #: FPE-34563
★★★★★ ★★★★★ 4 Reviews
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The Fleece FPE-34563 PowerFlo Lift Pump supplies your 2011-2016 GM 6.6L Duramax LML with enough fuel to support up to 800HP! Unlike other pumps on the market, the PowerFlo lift pump is an in-tank pump that replaces the OE unit. This allows you to retain your factory fuel heater, factory fuel lines, and factory water-in fuel sensor. Because it's a direct replacement, the PowerFlo installs in less than half the time of the other lift pumps. Using a dual OE quality Gerotor Design, the PowerFlo Lift Pump gives you consistency and reliability even in dual cp3 pump configurations. 

Made for a seamless integration, the PowerFlo Lift Pump does not require draw straws, sumps, additional filtration, or any other accessories for installation. Unlike other aftermarket pumps, the PowerFlo does not suffer from the 1/4 tank issues common in many other aftermarket fuel systems. For those that still would prefer a custom fuel system, the PowerFlo outlet and return is threaded to accept a -8 O-ring fitting (3/4"-16 thread) so you can add your own fuel lines, or aftermarket fuel filters if you choose. Each pump comes ready to install and is backed by the Fleece Lifetime Warranty! 

  • In-Tank Direct Replacement
  • Supplies Enough Fuel For 800HP
  • Increase Reliability From Dual Gerotor Design
  • Seamless Integration - No Need Install All New Fuel System Plumbing
  • Lifetime Warranty
Shipping Restrictions Apply shipping restriction icon This product can not be shipped to these states/provinces: CA

Vehicle Fitment

2011 Chevy 6.6L LML Duramax
2012 Chevy 6.6L LML Duramax
2013 Chevy 6.6L LML Duramax
2014 Chevy 6.6L LML Duramax
2015 Chevy 6.6L LML Duramax
2016 Chevy 6.6L LML Duramax
2011 GMC 6.6L LML Duramax
2012 GMC 6.6L LML Duramax
2013 GMC 6.6L LML Duramax
2014 GMC 6.6L LML Duramax
2015 GMC 6.6L LML Duramax
2016 GMC 6.6L LML Duramax


  • MPN FPE-34563
  • SKU FPE-34563
  • GTIN 670875716155
  • ID 34924
  • Manufacturer Name Fleece Performance
  • Shipping Weight 5.00 lb.
  • Shipping Length 22 in.
  • Shipping Width 10 in.
  • Shipping Height 12 in.
  • Fuel Type Diesel
  • Warranty Info Lifetime
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Cross Reference # 13578389, 13578388
  • Internal L4R4


★★★★★ ★★★★★
4.8/5 Stars out of 4 Reviews
Verified Buyer
So far so good.
Product arrived as promised is good condition. I paid the local Chevrolet dealer to install this unit in my 2012 GMC K2500 Sierra. My original fuel sending unit was failing so it was the perfect time to make the switch to a lift pump product to try and save the life of the CP 4 fuel pump in my LML. The unit works as planned so far, it’s only been a few days. If it goes tits up I’ll let you know.
Verified Buyer
will never put a air dog or fass on a daily driver again
Great product, deceiving instructions.
Struggled with getting the piggy back fuse to work correctly. Lack of instructions on the section.
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