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USD 426.55
Part #: FASSDMAX-7001

FASS DMAX-7001 Dura-Max Flow Enhancer Fuel Pump

2001-2010 GM 6.6L Duramax LB7/LLY/LBZ/LMM
Part #: FASSDMAX-7001
★★★★★ ★★★★★ 3 Reviews
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The FASS DMAX-7001 Dura-Max Flow Enhancer Fuel Pump for your 2001-2010 GM 6.6L Duramax is the perfect option for stock trucks and budget minded enthusiasts. Duramax diesel engines do not come with a factory lift pump, this is why Duramax owners see such excellent performance after installing a fuel lift pump.

When the CP3 injection pump pulls fuel under vacuum it can introduce air and vapor into your fuel, which can lead to injector failure. The D-Max Flow Enhancer has been designed to provide your Duramax engine with a constant 8 PSI fuel pressure, aiding the injection system by reducing the amount of work your factory injection pump has to perform. This extends its expected life and improves performance gains. Since the D-Max Flow Enhancer is a "pusher" pump, all fuel is placed under pressure, helping prevent the introduction of air and vapor.

  • Easy Installation
  • Improves Fuel Flow 
  • 8 PSI Fuel Pressure 
  • Increases Performance
  • Delivers Fuel Under Pressure 
  • Reduces Factory CP3 Workload 
Shipping Restrictions Apply shipping restriction icon This product can not be shipped to these states: CA

Vehicle Applications

2001 Chevy 6.6L LB7 Duramax
2002 Chevy 6.6L LB7 Duramax
2003 Chevy 6.6L LB7 Duramax
2004 Chevy 6.6L LB7 Duramax
2004.5 Chevy 6.6L LLY Duramax
2005 Chevy 6.6L LLY Duramax
2006 Chevy 6.6L LLY/LBZ Duramax
2007 Chevy 6.6L LLY/LBZ Duramax
2007.5 Chevy 6.6L LMM Duramax
2008 Chevy 6.6L LMM Duramax
2009 Chevy 6.6L LMM Duramax
2010 Chevy 6.6L LMM Duramax
2001 GMC 6.6L LB7 Duramax
2002 GMC 6.6L LB7 Duramax
2003 GMC 6.6L LB7 Duramax
2004 GMC 6.6L LB7 Duramax
2004.5 GMC 6.6L LLY Duramax
2005 GMC 6.6L LLY Duramax
2006 GMC 6.6L LLY/LBZ Duramax
2007 GMC 6.6L LLY/LBZ Duramax
2007.5 GMC 6.6L LMM Duramax
2008 GMC 6.6L LMM Duramax
2009 GMC 6.6L LMM Duramax
2010 GMC 6.6L LMM Duramax


  • MFG. Number DMAX-7001
  • Manufacturer Name FASS
  • Shipping Weight 10.00 lb.
  • Shipping Length 14 in.
  • Shipping Width 14 in.
  • Shipping Height 6 in.
  • Fuel Type Diesel
  • UPC 850044106738
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal L6.00R2.00


★★★★★ ★★★★★
4.7/5 Stars out of 3 Reviews
works great along with cat filter seems to start a little easier and idle smoother
LMM Stock, for now
I purchased this pump along with the CAT filter adapter replacement for filtration upgrade and to keep from having to prime the filter periodically. Install was a breeze with little help! Two days into daily driving and the 3amp fuse that comes with an add a fuse kit, blows and stops my truck. So the truck won't run if the pump isn't working for the record.. I replaced the fuse with an equivalent amp fuse as my ignition and it runs fine. Now I'm dealing with a change filter and check engine light. Thanks xdp for quick delivery and fair price!
6 month update
I haven't had any problems after replacing the last fuse. The pump does its job and I haven't had to prime the filter once since pump install. Fixing to change the supplied filter and the cat filter that I also converted to. Thanks again xdp!

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Questions and Answers

What pressure dose this pump put out?
View Staff Answer 
(01-10 Duramax) FASSDMAX-7001 - 70gph @ 10psi **Install Sheet**
(11-12 Duramax) FASSDMAX-7002 - 70gph @ 10psi **Install Sheet**
Will fuel still flow if pump fails?
View Staff Answer 

If the pump were to fail, fuel would still flow through the FASS system.

Where do you mount this item?
View Staff Answer 
Does this pump come ready to install or do I need a install kit?
View Staff Answer 

The Dura-Max Flow Enhancer pumps are full kits with simple installations.

2001-2010 Install Manual (Kit Contents) – Click Here

2011-2015 Install Manual (Kit Contents) – Click Here

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