{"title":"RAM, (2019-2024) 6.7L Cummins, Fuel System, Tanks","description":"\u003cdiv class=\"sds-copy-intro\"\u003e\u003cp\u003eFuel and DEF fill parts for the 2019-2024 Ram 2500 and 3500 with the 6.7L Cummins. Every one of these trucks carries two tanks you fill: diesel for the engine and diesel exhaust fluid for the SCR system. Know which is which every time, because the wrong fluid in either tank is a real-world failure on this platform.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv class=\"sds-copy-guide\"\u003e\n\u003ch2\u003eFuel and DEF tanks on the 2019-2024 RAM 6.7L Cummins\u003c\/h2\u003e\n\u003cp\u003eThe fuel tank on a crew cab short-bed truck holds 31 gallons, and other cab and bed combinations vary. Inside it, an electric lift pump feeds the frame-mounted water separator, the engine filter and the high-pressure pump. The DEF tank is just as busy: it houses the Bosch Denoxtronic module, with the DEF pump, heater and level-quality sensor, that supplies the selective catalytic reduction system on every 2019-2024 \u003ca href=\"\/collections\/cummins\"\u003eCummins\u003c\/a\u003e pickup. The engine is approved for ULSD and biodiesel blends up to B20; going past that limit risks fuel-system corrosion.\u003c\/p\u003e\n\u003ch2\u003eWhat goes wrong at the fill\u003c\/h2\u003e\n\u003cp\u003eTwo things on this generation touch the tanks. The first is mis-fueling. On one 2020 Ram 3500, a dealer traced a check-engine light and DEF warning to diesel fuel contaminating the DEF. That's an owner report rather than a pattern, but it shows how real the risk is. The second is the CP4.2 on 2019-2020 trucks. When one fails it sheds metal into the rail, injectors, lines and the fuel tank itself. Recall 21V-880 (Y78) replaced the CP4 with a CP3, reflashed the PCM and inspected the fuel system, and some owners still report misfires afterward, with contamination left in the system the usual suspect.\u003c\/p\u003e\n\u003ch2\u003eStock replacement vs. upgrade\u003c\/h2\u003e\n\u003cp\u003eA billet cap is a straight swap on the factory filler, with no change to how either system works. Bigger changes involve the tank itself. If you're weighing a high-capacity replacement fuel tank, the 52-gallon crew cab short-bed and 56-gallon crew cab long-bed designs on the market reuse the OEM sending unit and pump seal, and the gauge on those tanks reads full for the first 8-10 gallons. Whatever tank you run, a lubricity additive at every fill, compatible with the DPF and SCR, is the standard preventive step on CP4 trucks and harmless on a CP3.\u003c\/p\u003e\n\u003ch2\u003eWhat we carry\u003c\/h2\u003e\n\u003cp\u003eRight now this collection holds billet fill caps from \u003ca href=\"\/collections\/ppe\"\u003ePacific Performance Engineering\u003c\/a\u003e (PPE):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePPE 273003000\u003c\/strong\u003e billet fuel cap with a built-in magnet, anodized green, listed for 2019-2025 6.7L trucks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePPE 273005000\u003c\/strong\u003e billet DEF cap, anodized blue, with a listed fitment range that covers every year on this page.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGreen on the diesel filler and blue on the DEF filler gives you a quick visual check before the nozzle goes in.\u003c\/p\u003e\n\u003ch2\u003eFitment notes\u003c\/h2\u003e\n\u003cp\u003eEach cap lists a fitment range wider than this page's years, and the ranges differ between the fuel and DEF caps, so check each listing with the fitment checker. Fuel-tank size depends on cab and bed, with 31 gallons on crew cab short beds, so verify by VIN before you order anything that replaces or modifies the tank. Rebel trucks from 2023 on, where the Cummins was optional, also carry a factory skid plate that protects the fuel tank.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes the magnetic PPE fuel cap protect a CP4 pump?\u003c\/h3\u003e\n\u003cp\u003eDon't count on any filler part for that. On 2019-2020 trucks the factory remedy was the Y78 recall, which replaced the CP4.2 with a CP3; any truck without documented Y78 completion should get it done, free, at the dealer. A DPF- and SCR-compatible lubricity additive at every fill is the standard preventive step.\u003c\/p\u003e\n\u003ch3\u003eWhat fuel can I run in a 2019-2024 6.7L Cummins?\u003c\/h3\u003e\n\u003cp\u003eULSD, and biodiesel blends up to B20. Going past the biodiesel limit risks corrosion in the fuel system. In extreme cold, add an anti-gel on top of the lubricity additive.\u003c\/p\u003e\n\u003ch3\u003eWhat if diesel ends up in the DEF tank, or DEF in the fuel?\u003c\/h3\u003e\n\u003cp\u003eHave it diagnosed rather than guessing. On one 2020 Ram 3500, a dealer traced a check-engine light and DEF warning to diesel contaminating the DEF, and fuel-system damage is the other outcome tied to mis-fueling. The DEF tank also houses the Denoxtronic pump, heater and level-quality sensor module.\u003c\/p\u003e\n\u003ch3\u003eWill a bigger fuel tank fit my truck?\u003c\/h3\u003e\n\u003cp\u003eIt depends on cab and bed. Crew cab short beds come with a 31-gallon tank, and replacement tanks are bed-length specific: 52-gallon designs for crew cab short beds and 56-gallon designs for crew cab long beds, both reusing the OEM sending unit and pump seal. Verify your tank by VIN before you order.\u003c\/p\u003e\n\u003cp class=\"sds-copy-cta\"\u003eNot sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"ppe-273003000-billet-fuel-cap-with-built-in-magnet-anodized-green-201-2025-6-7l-2019-2023-3-0l-cummins","title":"PPE 273003000 Billet Fuel Cap with Built-In Magnet (Anodized Green) (2019-2025 6.7L, 2019-2023 3.0L EcoDiesel)","description":"\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision cnc machined 6061-T6 aluminum alloy\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant green anodized aluminum finish\u003c\/li\u003e\n\u003cli\u003eViton o-ring for a secure seal\u003c\/li\u003e\n\u003cli\u003eBuilt-in high-temperature rated neodymium magnet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep your fuel filler neck and fuel tank contaminants-free smoothly with this precision CNC-machined billet aluminum fuel cap. Featuring a high-quality Viton O-ring seal, it provides a secure, airtight fit that protects your fuel system from contaminants like dust, dirt, and moisture.\u003c\/p\u003e\n\u003cp\u003eThe fuel cap also includes a powerful neodymium magnet on the bottom, allowing for easy adhesion to body panels during refueling.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSome '19 trucks manufactured in the early 2019 are equipped with the 13-18 style diesel fill neck without the locking feature. Use PPE\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/ppepower.com\/products\/ram-ecodiesel-green-aluminum-fuel-cap-magnetic-anodized-green-billet\" rel=\"noopener\" target=\"_blank\"\u003e273001000\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efor these applications.\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":51744866271520,"sku":"273003000","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/3043\/6640\/files\/ppe-273003000-billet-fuel-cap-with-built-in-magnet-anodized-green-2019-2025-67l-2019-2023-30l-cummins-8771747.webp?v=1779891427"},{"product_id":"ppe-273005000-billet-diesel-exhaust-fluid-def-cap-anodized-blue-2007-5-2026-6-7l-2014-2023-3-0l-cummins","title":"PPE 273005000 Billet Diesel Exhaust Fluid (DEF) Cap (Anodized Blue) (2007.5-2026 6.7L, 2014-2023 3.0L EcoDiesel)","description":"\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision cnc machined 6061-T6 aluminum alloy\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant blue anodized aluminum finish\u003c\/li\u003e\n\u003cli\u003eViton o-ring for a secure seal\u003c\/li\u003e\n\u003cli\u003eBuilt-in high-temperature rated neodymium magnet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep your DEF filler neck contaminants-free with this precision CNC-machined billet aluminum fuel cap. Featuring a high-quality Viton O-ring seal, it provides a secure, airtight fit that protects your DEF system from contaminants like dust, dirt, and moisture.\u003c\/p\u003e\n\u003cp\u003eThe fuel cap also includes a powerful neodymium magnet on the bottom, allowing for easy adhesion to body panels during refueling\u003c\/p\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":51746090451232,"sku":"273005000","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/3043\/6640\/files\/ppe-273005000-billet-diesel-exhaust-fluid-def-cap-anodized-blue-20075-2026-67l-2014-2023-30l-cummins-7076931.webp?v=1779891428"},{"product_id":"s-b-10-1009-55-gallon-replacement-fuel-tank-2006-2024-dodge-ram-mega-cab-short-bed","title":"S\u0026B 10-1009 55 Gallon Replacement Fuel Tank (2006-2024 Dodge \/ Ram Mega Cab Short Bed)","description":"\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2006-2024 Dodge \/ Ram Mega Cab Short Bed\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cul data-mce-fragment=\"1\"\u003e \u003cli data-mce-fragment=\"1\"\u003eThe fuel gauge will continue to work however the distance to empty will not be accurate. There is no way to update the fuel tank size for the distance to empty to be accurate.\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e OEM sending unit \u0026amp; float are reused because the S\u0026amp;B Tank is taller the gauge will stay on full for the first 8-10 gallons.\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eThe nozzle at high-flow fuel stations(truck stops) will not be able to fill automatically. \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cspan\u003eDo you have an Auxiliary Fuel Tank? \u003c\/span\u003eRead why\u003cspan\u003e using these with our tanks will void the Lifetime Warranty.\u003c\/span\u003e\u003c\/p\u003e","brand":"S\u0026B","offers":[{"title":"Default Title","offer_id":67686291439904,"sku":"10-1009","price":1449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/3043\/6640\/files\/sb-10-1009-55-gallon-replacement-fuel-tank-2006-2024-dodge-ram-mega-cab-short-bed-7569797.png?v=1791438561"},{"product_id":"s-b-10-1021-1-52-gallon-replacement-fuel-tank-2005-2024-dodge-ram-cummins-crew-quad-cab-short-bed","title":"S\u0026B 10-1021-1 52 Gallon Replacement Fuel Tank (2005-2024 Dodge\/Ram Cummins Crew, Quad Cab Short Bed)","description":"\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2005-2024 Dodge\/Ram Cummins Crew, Quad Cab Short Bed\u003c\/p\u003e\u003cdiv\u003e \u003cstrong\u003eImportant Notes:\u003c\/strong\u003e \u003cul data-mce-fragment=\"1\"\u003e \u003cli data-mce-fragment=\"1\"\u003eThe fuel gauge will continue to work however the distance to empty will not be accurate. There is no way to update the fuel tank size for the distance to empty to be accurate.\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e OEM sending unit \u0026amp; float are reused because the S\u0026amp;B Tank is taller the gauge will stay on full for the first 8-10 gallons.\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eThe nozzle at high-flow fuel stations(truck stops) will not be able to fill automatically. \u003c\/li\u003e \u003c\/ul\u003e \u003cspan\u003eDo you have an Auxiliary Fuel Tank? \u003c\/span\u003eRead why\u003cspan\u003e using these with our tanks will void the Lifetime Warranty.\u003c\/span\u003e \u003c\/div\u003e","brand":"S\u0026B","offers":[{"title":"Default Title","offer_id":67686293799200,"sku":"10-1021-1","price":1249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/3043\/6640\/files\/sb-10-1021-1-52-gallon-replacement-fuel-tank-2005-2024-dodgeram-cummins-crew-quad-cab-short-bed-6780366.png?v=1791438556"},{"product_id":"s-b-10-1033-56-gallon-high-capacity-fuel-tank-2013-2026-dodge-ram-cummins-6-7l-crew-cab-long-bed","title":"S\u0026B 10-1033 56 Gallon High-Capacity Fuel Tank (2013-2026 Dodge Ram Cummins 6.7L, Crew Cab Long Bed)","description":"\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2013-2026 Dodge Ram Cummins 6.7L, Crew Cab Long Bed\u003c\/p\u003e\u003cp\u003eSignificantly increase the range on 2013-2026 Ram Cummins 6.7L Crew Cab Long Bed trucks by upgrading to the S\u0026amp;B 56 Gallon High-Capacity Fuel Tank — a direct, bolt-on replacement for the stock 31 gallon tank.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eThe fuel gauge will continue to work however the distance to empty will not be accurate. There is no way to update the fuel tank size for the distance to empty to be accurate.\u003c\/li\u003e \u003cli\u003e OEM sending unit \u0026amp; float are reused because the S\u0026amp;B Tank is taller the gauge will stay on full for the first 8-10 gallons \u003c\/li\u003e \u003cli\u003eThis tank replaced 10-1007 which fit the 2013-2024 Ram CCLB 2 piece driveline trucks\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cspan\u003eDo you have an Auxiliary Fuel Tank? \u003c\/span\u003eRead why\u003cspan\u003e using these with our tanks will void the Lifetime Warranty.\u003c\/span\u003e\u003c\/p\u003e","brand":"S\u0026B","offers":[{"title":"Default Title","offer_id":67686293930272,"sku":"10-1033","price":1449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/3043\/6640\/files\/sb-10-1033-56-gallon-high-capacity-fuel-tank-2013-2026-dodge-ram-cummins-67l-crew-cab-long-bed-9903914.png?v=1791438560"},{"product_id":"s-b-10-1035-50-gallon-high-capacity-fuel-tank-2005-2026-dodge-ram-cummins-5-9l-6-7l-crew-and-quad-cab-short-bed","title":"S\u0026B 10-1035 50 Gallon High-Capacity Fuel Tank (2005-2026 Dodge Ram Cummins 5.9L \u0026 6.7L, Crew and Quad Cab Short Bed)","description":"\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2005-2026 Dodge Ram Cummins 5.9L \u0026amp; 6.7L, Crew and Quad Cab Short Bed\u003c\/p\u003e\u003cp\u003eExtend driving range on 2005–2026 Ram Cummins 5.9L \u0026amp; 6.7L Crew Cab Short Bed trucks with S\u0026amp;B’s 50 gallon high-capacity fuel tank. This direct, bolt-on upgrade replaces the factory 31-gallon tank for fewer stops and more freedom.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eThe fuel gauge will continue to work however the distance to empty will not be accurate. There is no way to update the fuel tank size for the distance to empty to be accurate.\u003c\/li\u003e \u003cli\u003e OEM sending unit \u0026amp; float are reused because the S\u0026amp;B Tank is taller the gauge will stay on full for the first 8-10 gallons \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cspan\u003eDo you have an Auxiliary Fuel Tank? \u003c\/span\u003eRead why\u003cspan\u003e using these with our tanks will void the Lifetime Warranty.\u003c\/span\u003e\u003c\/p\u003e","brand":"S\u0026B","offers":[{"title":"Default Title","offer_id":67686294454560,"sku":"10-1035","price":1449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/3043\/6640\/files\/sb-10-1035-50-gallon-high-capacity-fuel-tank-2005-2026-dodge-ram-cummins-59l-67l-crew-and-quad-cab-short-bed-6096706.png?v=1791438556"}],"url":"https:\/\/www.southerndieselsupply.com\/collections\/ram-2019-2024-6-7l-cummins-fuel-system-tanks.oembed","provider":"Southern Diesel Supply","version":"1.0","type":"link"}