FASS Fuel Pump for 6.6 Duramax (2001-2024)
The FASS Titanium Signature Series Fuel System is a direct-fit lift pump upgrade for GM and Chevy trucks equipped with the 6.6L Duramax diesel engine. Designed to replace the factory lift pump setup, this system delivers consistent fuel pressure, advanced filtration, and proper fuel supply under towing, daily driving, or high-performance conditions.
Whether you run a stock work truck or a tuned Duramax with added fueling, the FASS system stabilizes inlet pressure and protects your injection system from contamination and aeration.
What’s Included
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FASS Titanium Signature Series Lift Pump
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Vehicle-Specific Mounting Brackets
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1/2″ Fuel Lines and Fittings
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2-3 Micron Fuel Filters
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Complete Wiring Harness and Hardware
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Installation Instructions
Approximate installation time: ~3 hours using basic hand tools.
Key Performance Specifications
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Flow Rate Options: 100, 140, 165, 180, 220, 240, 250, and 290 GPH (application dependent)
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Filtration Rating: 2-3 micron advanced filtration
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Integrated Air & Vapor Separation
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Water Separation Capability
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1/2″ Fuel Line Upgrade for Increased Volume Capacity
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Built for extreme operating conditions
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Backed by a Limited Lifetime Warranty (light-duty diesel applications)
Higher flow configurations are recommended for trucks with upgraded injectors, tuning, or future power plans.
Vehicle Fitment
Compatible with the following Duramax engine platforms:
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2001-2004 GM/Chevy Duramax 6.6L LB7
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2004.5-2005 GM/Chevy Duramax 6.6L LLY
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2006-2007 GM/Chevy Duramax 6.6L LBZ
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2007.5-2010 GM/Chevy Duramax 6.6L LMM
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2011-2016 GM/Chevy Duramax 6.6L LML
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2017-2024 GM/Chevy Duramax 6.6L L5P
Each kit is engineered to match the proper fuel system layout for your specific model year and engine configuration.
Benefits & Features
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Maintains Stable Fuel Pressure – Prevents pressure drop under heavy load or towing
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Reduces Injector Wear – Advanced filtration removes fine debris and contaminants
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Air & Vapor Separation – Eliminates aeration that can damage injectors
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Improved Cold Starts – Cleaner fuel supply enhances start-up performance
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Smoother Idle & Operation – Consistent fuel delivery stabilizes engine behavior
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Supports Stock & Tuned Builds – Flow rates available for mild to high-horsepower setups
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Extends Fuel System Life – Protects injectors and injection pump from premature wear
Why Choose FASS for Your Duramax?
The Titanium Signature Series is manufactured in the USA and built to handle demanding real-world conditions. With multiple flow-rate options and long filter service intervals, it’s a reliable upgrade for work trucks, tow rigs, and performance builds alike.
If you depend on your 6.6L Duramax for towing, hauling, or daily driving, a FASS fuel system ensures your injection system receives clean, consistent fuel - no matter the load.
Upgrade Your Duramax Fuel Supply
Choose the FASS Fuel System for GM Duramax (2001-2024) to protect your injectors, stabilize fuel pressure, and support long-term engine reliability.