{"product_id":"fass-drop-in-series-diesel-fuel-system-2017-2025-6-6l-duramax","title":"FASS Drop-In Series Diesel Fuel System (2017-2025 6.6L Duramax)","description":"\u003cdiv id=\"dmFirstContainer\" class=\"dmBody u_dmStyle_template_details dm-home-page\"\u003e\n\u003cdiv id=\"allWrapper\" class=\"allWrapper\"\u003e\n\u003cdiv id=\"dm_content\" class=\"dmContent\" role=\"main\"\u003e\n\u003cdiv class=\"dmHomeRespTmpl mainBorder dmRespRowsWrapper dmFullRowRespTmpl dmRespRowsWrapperSize1\" id=\"1716942098\"\u003e\n\u003cdiv class=\"u_1243667655 dmRespRow fullBleedChanged fullBleedMode\" id=\"1243667655\"\u003e\n\u003cdiv class=\"dmRespColsWrapper\" id=\"1173148036\"\u003e\n\u003cdiv class=\"dmRespCol small-12 u_1620106714 medium-12 large-12\" id=\"1620106714\"\u003e\n\u003cdiv class=\"widget-acfbcc u_1116307009 dmCustomWidget\" data-lazy-load=\"false\" data-title=\"\" id=\"1116307009\" data-element-type=\"custom_extension\" data-widget-id=\"acfbccebdb1a4363857e6ae1b54372d9\" 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data-widget-initialized=\"\"\u003e\n\u003cdiv class=\"midawy-product-page\"\u003e\n\u003cdiv class=\"midway-content-details\"\u003e\n\u003cdiv class=\"midway-content-details-detail\"\u003e\n\u003ch3\u003eFASS Drop-In Series Fuel System – for 2017 to 2025 GMC\/Chevrolet, Duramax 6.6L\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHIS IS NOT A LIFT PUMP! This is an air separation\/filtration system that utilizes your factory lift pump.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe DIFSL5P1001 Fits: 2017-2025 Crew Cab Long Bed L5P Duramax\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe DIFSL5P1001 Fits: 2017-2019 Crew Cab Short Bed L5P Duramax\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe DIFSL5P2001 Fits: 2020-2025 Crew Cab Short Bed L5P Duramax\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: Installation on cab and chassis may require modifications. Drop In Fuel Systems are plug and play filtration upgrades and not compatible with Fuel Sump Kits. System retains the OEM in tank fuel pump.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe FASS Drop In Series Diesel Fuel System is engineered to be the most effective filtration solution for the 6.6L Duramax. Backed by a limited lifetime warranty, it protects against issues caused by fuel contamination.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf you drive a GMC\/Chevrolet with a Duramax diesel engine and want better fuel filtration, improved reliability, and injector protection without an external frame mounted pump, this is the perfect solution.\u003c\/p\u003e\n\u003cp\u003eThe FASS Drop-In Series System for the L5P Duramax replaces the plastic OEM single filter housing with a 6061-T6 billet aluminum American made dual filter housing. This system utilizes the OEM water separator element in conjunction with our 2 micron Extreme Water Separator. Utilizing the OEM water separator element allows the water-in-fuel sensor to operate correctly, notifying you before the water reaches the clean side of the fuel filter element. Many other systems on the market utilize a spin-on water separator that places the WIF sensor on the clean side of the filter meaning by the time your WIF light is triggered, it’s too late! Our Extreme Water Separator provides the final particulate and water filtration filtering particulates down 2 microns and removes over 99% free and emulsified water. OEM filtration provides a 5 micron filtration rating allowing the larger particulates to pass through to your injection system.\u003c\/p\u003e\n\u003ch2\u003eReliability, Simplicity, Protection\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Stock \u0026amp; Modified Duramax:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003ePlenty of fuel for stock and modified GMCs and Chevrolets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjector Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWill triple the life of your injectors and injection pump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFASS Filtration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOptimizes combustion, restores horsepower, maximizes MPG (results vary).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimited Lifetime Warranty:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRegister your FASS system for coverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAdvanced Filtration Technology\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Separation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3rd‑party proven to eliminate over 99% of water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir\/Vapor Removal:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEliminates entrained air and vapor that damage injection systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 Micron Absolute Microglass Filtration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRemoves smaller debris than OEM filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves Reliability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTriples the injection system life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximized Horsepower:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eImproved fuel atomization and restored timing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized MPG:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMore efficient combustion (results vary).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeace of Mind:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eExtreme Water Separator acts as a fail‑safe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Weather Confidence:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDependable starts in extreme cold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleaner Operation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReduces DPF regens and soot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves Fuel Lubricity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAt least 10% improvement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOnly drop in 6.6L Duramax filtration system that retains OEM water in fuel light.\u003c\/li\u003e\n\u003cli\u003eOnly drop in 6.6L Duramax filtration system with air separation.\u003c\/li\u003e\n\u003cli\u003e100% drop in installation; no modifications needed.\u003c\/li\u003e\n\u003cli\u003eRetains factory in tank lift pump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Radius Cuts (PRC):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Smoother internal fuel flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 micron absolute filtration rating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e Captures finer debris than OEM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemoves over 99% of water:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e 3rd party verified.\u003c\/li\u003e\n\u003cli\u003ePatented air\/vapor removal process.\u003c\/li\u003e\n\u003cli\u003eHeater options available for cold weather.\u003c\/li\u003e\n\u003cli\u003eLimited Lifetime Warranty (with registration).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat’s Included In The DIFSL5P FASS Drop-In Series:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e(1) FASS Drop-In Series Air Separation\/Filtration System\u003c\/li\u003e\n\u003cli\u003e(1) FASS XWS3002 Extreme Water Separator\u003c\/li\u003e\n\u003cli\u003e(1) Installation Kit Including Fittings, Bracketry, and Hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose FASS?\u003c\/h2\u003e\n\u003cp\u003eFASS designs fuel systems with longevity and real‑world performance in mind. The Drop‑In Series offers proven filtration and injector protection without altering the OEM configuration, ideal for daily drivers and work trucks.\u003c\/p\u003e\n\u003ch3\u003eVehicle Fitment by Year\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2017 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2017 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2017 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2017 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2018 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2018 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2018 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2018 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2019 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2019 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2019 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2019 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2020 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2020 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2020 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2020 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2021 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2021 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2021 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2021 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2022 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2022 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2022 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2022 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2023 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2023 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2023 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2023 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2024 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2024 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2024 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2024 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2025 GMC Sierra 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2025 GMC Sierra 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2025 Chevrolet Silverado 2500HD\/3500HD Crew Cab Short Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003cli\u003e2025 Chevrolet Silverado 2500HD\/3500HD Crew Cab Long Bed – 6.6L Duramax (L5P)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dmFooterContainer\"\u003e\n\u003cdiv id=\"fcontainer\" class=\"u_fcontainer f_hcontainer dmFooter p_hfcontainer\"\u003e\n\u003cdiv 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