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The Fleece Performance SureFlo Performance Sending Unit (FPE−SF−GM−0410) offers a comprehensive solution to a notorious vulnerability in modified diesel fuel systems. When upgrading an LLY, LBZ, or LMM Duramax truck (model years 2004.5–2010) with a high-flow external aftermarket lift pump, enthusiasts are typically forced to install a traditional "draw straw" or drill the tank for a sump. Both methods carry severe architectural flaws, most notably the "quarter-tank issue." When fuel levels drop, sloshing causes these systems to draw air instead of fuel, resulting in pump cavitation (vapor bubbles forming and collapsing) which starves the engine and inflicts premature wear on expensive fuel system components.
To eliminate these engineering vulnerabilities, the SureFlo unit installs directly into the factory location without requiring any invasive modifications to the fuel tank. It operates via an integrated bucket assembly that acts as a localized reservoir, constantly drawing fuel from and returning it to the base of the unit. This clever design utilizes one-way check valves to keep the bucket completely submerged even during low-fuel conditions, effectively keeping air out of the lines and eradicating quarter-tank starvation. The system accommodates both factory setups and custom modifications through the following features:
- No-Drill OEM Fitment: Drops right into the stock sending unit location using factory-style quick-disconnect fittings, bypassing the need to cut or drill the fuel tank.
- Heavy-Duty Construction: Built with a rugged billet aluminum cap for superior durability and a reliable seal.
- Integrated Level Electronics: Equipped with a brand-new fuel level sender and float assembly to restore accurate dashboard fuel gauge readings.
- Plumbing Flexibility: Features universal -8 AN ports, allowing owners to easily plumb custom fuel lines directly to the tank.
- Complete Installation Seal: Includes a fresh O-ring or flange seal to guarantee a leak-free installation.
- Warranty Protection: Backed by a 1-Year Limited Parts Warranty for peace of mind.
Beyond solving the technical issues associated with aftermarket lift pumps, this sending unit serves as an ideal replacement for Duramax trucks originally equipped without an in-tank pump. Whether you need to fix a malfunctioning factory fuel level sender or require a robust foundation for a completely custom high-performance fuel delivery system, the SureFlo provides the necessary plumbing versatility. By protecting your pump from dry-running and ensuring continuous fuel delivery, it stands as an essential upgrade for maintaining fuel system longevity and engine reliability.
Notes:
- For fitment/use in Titan Fuel Tanks, reference this Fitment Data.
- This sending unit will not fit S&B fuel tanks.
- For optimal performance, this product has been tested to work with aftermarket lift pumps including AirDog !!-5G with flow rates up to 220 GPH and Fass with flow rates up to 290 GPH.
The Fleece Performance SureFlo Performance Sending Unit (FPE−SF−GM−0410) offers a comprehensive solution to a notorious vulnerability in modified diesel fuel systems. When upgrading an LLY, LBZ, or LMM Duramax truck (model years 2004.5–2010) with a high-flow external aftermarket lift pump, enthusiasts are typically forced to install a traditional "draw straw" or drill the tank for a sump. Both methods carry severe architectural flaws, most notably the "quarter-tank issue." When fuel levels drop, sloshing causes these systems to draw air instead of fuel, resulting in pump cavitation (vapor bubbles forming and collapsing) which starves the engine and inflicts premature wear on expensive fuel system components.
To eliminate these engineering vulnerabilities, the SureFlo unit installs directly into the factory location without requiring any invasive modifications to the fuel tank. It operates via an integrated bucket assembly that acts as a localized reservoir, constantly drawing fuel from and returning it to the base of the unit. This clever design utilizes one-way check valves to keep the bucket completely submerged even during low-fuel conditions, effectively keep[...]
The Fleece Performance SureFlo Performance Sending Unit (FPE−SF−GM−0410) offers a comprehensive solution to a notorious vulnerability in modified diesel fuel systems. When upgrading an LLY, LBZ, or LMM Duramax truck (model years 2004.5–2010) with a high-flow external aftermarket lift pump, enthusiasts are typically forced to install a traditional "draw straw" or drill the tank for a sump. Both methods carry severe architectural flaws, most notably the "quarter-tank issue." When fuel levels drop, sloshing causes these systems to draw air instead of fuel, resulting in pump cavitation (vapor bubbles forming and collapsing) which starves the engine and inflicts premature wear on expensive fuel system components.
To eliminate these engineering vulnerabilities, the SureFlo unit installs directly into the factory location without requiring any invasive modifications to the fuel tank. It operates via an integrated bucket assembly that acts as a localized reservoir, constantly drawing fuel from and returning it to the base of the unit. This clever design utilizes one-way check valves to keep the bucket completely submerged even during low-fuel conditions, effectively keeping air out of the lines and eradicating quarter-tank starvation. The system accommodates both factory setups and custom modifications through the following features:
- No-Drill OEM Fitment: Drops right into the stock sending unit location using factory-style quick-disconnect fittings, bypassing the need to cut or drill the fuel tank.
- Heavy-Duty Construction: Built with a rugged billet aluminum cap for superior durability and a reliable seal.
- Integrated Level Electronics: Equipped with a brand-new fuel level sender and float assembly to restore accurate dashboard fuel gauge readings.
- Plumbing Flexibility: Features universal -8 AN ports, allowing owners to easily plumb custom fuel lines directly to the tank.
- Complete Installation Seal: Includes a fresh O-ring or flange seal to guarantee a leak-free installation.
- Warranty Protection: Backed by a 1-Year Limited Parts Warranty for peace of mind.
Beyond solving the technical issues associated with aftermarket lift pumps, this sending unit serves as an ideal replacement for Duramax trucks originally equipped without an in-tank pump. Whether you need to fix a malfunctioning factory fuel level sender or require a robust foundation for a completely custom high-performance fuel delivery system, the SureFlo provides the necessary plumbing versatility. By protecting your pump from dry-running and ensuring continuous fuel delivery, it stands as an essential upgrade for maintaining fuel system longevity and engine reliability.
Notes:
- For fitment/use in Titan Fuel Tanks, reference this Fitment Data.
- This sending unit will not fit S&B fuel tanks.
- For optimal performance, this product has been tested to work with aftermarket lift pumps including AirDog !!-5G with flow rates up to 220 GPH and Fass with flow rates up to 290 GPH.