{"product_id":"2011-2016-lml-cp4-to-cp3-conversion-kit","title":"2011-2016 LML CP4 to CP3 Conversion Kit","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eLML Duramax CP4 → CP3 Conversion Kit (2011–2016)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eIf you own a \u003cstrong\u003e2011–2016 LML Duramax\u003c\/strong\u003e, you already know the factory CP4 injection pump has a reputation for failure — and when it goes, it can contaminate the entire fuel system with metal debris. That means injectors, rails, sensors, and lines can all be affected, turning a single failure into a major repair.\u003c\/p\u003e\n\u003cp\u003eThis conversion kit allows you to replace the failure-prone CP4 with the proven and reliable CP3 pump setup — the same style pump trusted in earlier Duramax platforms and high-performance builds.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eWhy Convert to CP3?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e✔ \u003cstrong\u003eImproved reliability\u003c\/strong\u003e – Eliminates one of the most common weak points in the LML fuel system\u003cbr\u003e✔ \u003cstrong\u003eFuel system protection\u003c\/strong\u003e – Helps reduce risk of system-wide contamination\u003cbr\u003e✔ \u003cstrong\u003ePerformance potential\u003c\/strong\u003e – Higher-flow CP3 options support stock builds up to race applications\u003cbr\u003e✔ \u003cstrong\u003ePeace of mind\u003c\/strong\u003e – Built for durability under towing, daily driving, or competition use\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat Makes This Kit Different\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis kit is designed to integrate cleanly and safely:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eUtilizes the \u003cstrong\u003efactory fuel line in the engine valley\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvoids problematic flare-style connections that can leak\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCleaner installation and reduced fire-risk concerns\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports factory fuel filtration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with aftermarket lift pumps using the included \u003cstrong\u003e½\" high-flow feed fitting\u003c\/strong\u003e and pre-molded hose\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e2011–2016 Chevrolet Silverado \/ GMC Sierra 2500HD \u0026amp; 3500HD 6.6L LML Duramax\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003ePump Options\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCP3 pump is optional\u003c\/strong\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWant more fuel? Select from higher-flow CP3 pump options for performance builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWorks for:\u003c\/p\u003e\n\u003cp\u003e• Stock trucks\u003cbr\u003e• Tow rigs\u003cbr\u003e• Daily drivers\u003cbr\u003e• High-horsepower street trucks\u003cbr\u003e• Competition builds\u003c\/p\u003e\n\u003ch3 data-start=\"1592\" data-end=\"1622\"\u003e\u003cstrong data-start=\"1596\" data-end=\"1622\"\u003eOptional Installer Kit\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1624\" data-end=\"1834\"\u003e\u003cstrong data-start=\"1624\" data-end=\"1653\"\u003eInstaller kit is optional\u003c\/strong\u003e and includes \u003cstrong data-start=\"1667\" data-end=\"1721\"\u003eall gaskets and O-rings removed during disassembly\u003c\/strong\u003e, allowing you to replace wear items while everything is already apart — saving time and preventing future leaks.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCP3 Conversion Install Hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-flow fuel feed components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePre-molded fuel hose\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAll necessary fittings and mounting components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003eUpgrading to a CP3 system is one of the most popular reliability and performance upgrades for the LML platform — protecting your fuel system while opening the door for future power upgrades.\u003c\/p\u003e","brand":"H2 Supply Co","offers":[{"title":"NO THANKS ILL SOURCE MY OWN \/ YES","offer_id":48264718713086,"sku":null,"price":745.0,"currency_code":"USD","in_stock":true},{"title":"NO THANKS ILL SOURCE MY OWN \/ NO THANKS I WILL SOURCE MY OWN","offer_id":48264718745854,"sku":null,"price":585.0,"currency_code":"USD","in_stock":true},{"title":"YES STOCK STYLE CP3 \/ YES","offer_id":48264718778622,"sku":null,"price":1805.0,"currency_code":"USD","in_stock":true},{"title":"YES STOCK STYLE CP3 \/ NO THANKS I WILL SOURCE MY OWN","offer_id":48264718811390,"sku":null,"price":1645.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/8008\/2942\/files\/FPE-LML-CP3-WP.webp?v=1779826515","url":"https:\/\/h2supplyco.com\/products\/2011-2016-lml-cp4-to-cp3-conversion-kit","provider":"H2 Supply CO","version":"1.0","type":"link"}