{"title":"2017-2019 GM 2500HD\/3500HD 6.6L L5P Duramax Radiators \u0026 Cooling Upgrades","description":"\u003cdiv\u003e \u003cinput type=\"checkbox\" class=\"read-more-state\" id=\"post-1\"\u003e  \u003cp class=\"read-more-wrap\"\u003e When pushed to their limit, the 2017-2019 6.6L Duramax L5P's can run a bit hot which causes further issues and unnecessary hassles down the road. These premium 2017-2019 GM Sierra\/Silverado 2500\/3500 cooling options were specifically engineered to keep engine temps under control and operating at peak performance even during the harshest applications. Choose from our selection of performance radiators or pick up a deep engine oil pan to help dissipate heat faster over stock, allowing your truck to outperform and outlast the competition.    \u003cspan class=\"read-more-target\"\u003e  \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eGM Duramax Fitments:\u003c\/strong\u003e 2017, 2018, 2019 GM 6.6L Duramax.\u003c\/span\u003e  \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eSubmodel Fitments:\u003c\/strong\u003e WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.\u003c\/span\u003e  \u003cspan class=\"headerspam\"\u003eSome exceptions apply, please see individual product pages for specific fitments.\u003c\/span\u003e  \u003c\/span\u003e\u003c\/p\u003e   \u003clabel for=\"post-1\" class=\"read-more-trigger\"\u003e\u003c\/label\u003e \u003c\/div\u003e  \u003cdiv class=\"filter-tag\"\u003eGM Duramax\u0026gt;2017-2019 6.6L L5P\u003c\/div\u003e","products":[{"product_id":"ppe-fpe-tl-lbz-lmm-allison-transmission-cooler-lines-06-10-gm-6-6l-duramax-lbz-lmm","title":"PPE 119000820 Billet Coolant Block Off Plate | 2001-2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCNC machined billet aluminum construction\u003c\/li\u003e\n\u003cli\u003eDurable thicker than OEM design\u003c\/li\u003e\n\u003cli\u003eLeak-resistant O-ring face seal\u003c\/li\u003e\n\u003cli\u003eHigh-quality Viton O-ring included\u003c\/li\u003e\n\u003cli\u003eImproved sealing over factory gasket\u003c\/li\u003e\n\u003cli\u003eDesigned for long-term reliability\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM plate\u003c\/li\u003e\n\u003cli\u003eUses factory mounting hardware\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant aluminum finish\u003c\/li\u003e\n\u003cli\u003ePrecision fit for Duramax engines\u003c\/li\u003e\n\u003cli\u003eReduces risk of coolant leaks\u003c\/li\u003e\n\u003cli\u003eBuilt for heavy-duty applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade Your Duramax Cooling System With Confidence And Reliability\u003c\/h4\u003e\n\u003cp\u003eWhen you are dialing in your Duramax, the last thing you want is a weak point hiding in your cooling system. The PPE billet coolant block off plate is designed to eliminate that concern with a stronger and more dependable solution than the factory setup. Instead of relying on a gasket that can wear down and eventually leak, this upgrade uses a precision O-ring seal that holds up over time. You get peace of mind knowing your truck is protected from slow leaks that can turn into bigger problems. Additionally, the billet aluminum construction adds a level of durability that feels right at home on a hard-working 6.6L Duramax. Installation stays simple since it reuses your factory hardware, so you are not stuck hunting for extra parts. Whether you are maintaining your truck or upgrading for long-term reliability, this is a small change that makes a noticeable difference. It is the kind of upgrade that keeps your build clean, dependable, and ready for whatever comes next.\u003c\/p\u003e\n\u003ch4\u003ePrecision Machined Design Built For Long Term Sealing Performance\u003c\/h4\u003e\n\u003cp\u003eAt the core of this PPE block off plate is a CNC machined billet aluminum body that delivers consistent fitment and strength. The increased thickness compared to the OEM plate helps resist warping and maintains proper sealing under varying temperatures. Furthermore, the integrated O-ring face seal design creates a more uniform sealing surface, which reduces the chances of coolant seepage over time. The included Viton O-ring is specifically chosen for its resistance to heat and chemical breakdown, making it ideal for long-term use in demanding engine environments. This design replaces the factory gasket system with a more reliable sealing method that requires less maintenance. What is more, the plate is engineered to install using factory fasteners, ensuring proper alignment without modification. Compatibility across 2001-2026 Silverado and Sierra 2500HD and 3500HD models with the 6.6L Duramax makes it a versatile upgrade. Every detail is focused on improving sealing performance while maintaining straightforward installation and dependable operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces failure-prone OEM gasket design\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Duramax cooling system\u003c\/li\u003e\n\u003cli\u003eRequires reuse of factory mounting hardware\u003c\/li\u003e\n\u003cli\u003eEnsures proper O-ring seating during install\u003c\/li\u003e\n\u003cli\u003eViton O-ring offers superior heat resistance\u003c\/li\u003e\n\u003cli\u003eThicker design improves long-term sealing\u003c\/li\u003e\n\u003cli\u003eIdeal for maintenance or preventative upgrades\u003c\/li\u003e\n\u003cli\u003eNo additional modifications required for install\u003c\/li\u003e\n\u003cli\u003eHelps prevent future coolant seepage issues\u003c\/li\u003e\n\u003cli\u003ePrecision fitment critical for leak prevention\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49526746513692,"sku":"PPE119000820","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/2001-2024-GM-6.6L-Duramax-Coolant-Block-Off-Plate-Billet-Aluminum-Black-Pacific-Performance-Engineering-753632.webp?v=1776180270"},{"product_id":"wehrli-wcf100155-billet-coolant-heater-core-firewall-fitting-99-22-gm-gm-66l-duramax","title":"Wehrli 100155 Billet Coolant Heater Core Firewall Fitting | 1999-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces failure-prone factory plastic fitting\u003c\/li\u003e\n\u003cli\u003eBillet aluminum construction for durability\u003c\/li\u003e\n\u003cli\u003e5\/8\" hose barb connection\u003c\/li\u003e\n\u003cli\u003eDouble O-ring seal prevents leaks\u003c\/li\u003e\n\u003cli\u003eClear anodized finish resists corrosion\u003c\/li\u003e\n\u003cli\u003eDirect-fit upgrade, no modifications needed\u003c\/li\u003e\n\u003cli\u003eWithstands heat and engine vibration\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eCompatible with GM Part 15032062\u003c\/li\u003e\n\u003cli\u003eAlso replaces Dorman 800-409\u003c\/li\u003e\n\u003cli\u003eImproves long-term reliability\u003c\/li\u003e\n\u003cli\u003eQuick and easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdd More Durability and Reliability to your GM Duramax Engine\u003c\/h4\u003e\n\u003cp\u003eIf you’ve ever dealt with a cracked or leaking plastic coolant fitting, you know how frustrating it can be. The factory heater core firewall fitting on Duramax-equipped GM trucks is a known weak point, and over time, heat and vibration take their toll. That’s where this billet aluminum upgrade from Wehrli Custom Fabrication comes in. Built as a direct replacement for the OEM part, this fitting is machined from high-quality aluminum and designed to hold up far better than the stock plastic piece. It features a 5\/8\" hose barb and double O-ring seal to help eliminate leaks, even under long-term heat cycles and engine vibration. The clear anodized finish adds corrosion resistance, giving it a clean, long-lasting appearance that’s built to handle the elements.\u003c\/p\u003e\n\u003ch4\u003eSimple Install\u003c\/h4\u003e\n\u003cp\u003eInstallation is straightforward and doesn’t require any special tools or permanent modifications. Whether you’re doing preventative maintenance or replacing a fitting that’s already failed, this is a simple upgrade that brings real peace of mind. It fits a wide range of GM trucks from 1999 to 2025, including both Silverado and Sierra 2500HD\/3500HD models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for failure-prone factory plastic fitting\u003c\/li\u003e\n\u003cli\u003eCompatible with GM Part #15032062 and Dorman #800-409\u003c\/li\u003e\n\u003cli\u003eFits 1999–2025 GM Silverado and Sierra 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003eMachined from billet aluminum for long-term durability\u003c\/li\u003e\n\u003cli\u003e5\/8\" hose barb with double O-ring for secure seal\u003c\/li\u003e\n\u003cli\u003eClear anodized finish resists corrosion and wear\u003c\/li\u003e\n\u003cli\u003eDesigned to withstand engine heat and vibration\u003c\/li\u003e\n\u003cli\u003eIdeal for preventative maintenance or failed part replacement\u003c\/li\u003e\n\u003cli\u003eNo special tools or modifications required for install\u003c\/li\u003e\n\u003cli\u003eMade in the USA with high-quality materials\u003c\/li\u003e\n\u003cli\u003eHelps prevent coolant leaks and improves reliability\u003c\/li\u003e\n\u003cli\u003eClean appearance and long-lasting performance under the hood\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Default Title","offer_id":49527168401692,"sku":"WCF100155","price":40.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/F221293467.jpg?v=1743018946"},{"product_id":"17-19-gm-25003500hd-66l-duramax-l5p-wehrli-oem-placement-coolant-tank-kit","title":"Wehrli 100433 OEM Placement Coolant Tank Kit | 2017-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2017-2019 Duramax L5P 6.6L engines\u003c\/li\u003e\n\u003cli\u003eMounts in the OEM coolant tank location\u003c\/li\u003e\n\u003cli\u003eFabricated aluminum tank with powder coating\u003c\/li\u003e\n\u003cli\u003eIncludes billet black anodized aluminum cap\u003c\/li\u003e\n\u003cli\u003eComes with low coolant level sensor\u003c\/li\u003e\n\u003cli\u003eIntegrated sight glass for coolant visibility\u003c\/li\u003e\n\u003cli\u003eIncludes overflow hose and installation hardware\u003c\/li\u003e\n\u003cli\u003eReplaces factory plastic reservoir for cleaner look\u003c\/li\u003e\n\u003cli\u003eWorks with stock components and mounting points\u003c\/li\u003e\n\u003cli\u003eInstalls easily with basic hand tools\u003c\/li\u003e\n\u003cli\u003eImproves engine bay appearance and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUpgrade The Look And Function Of Your Cooling System\u003c\/h4\u003e\n\u003cp\u003eIf you're tired of the dull, yellowing plastic coolant reservoir cluttering up your engine bay, the Wehrli OEM Placement Coolant Tank Kit is the perfect solution for your 2017-2019 Duramax. This tank isn’t just a replacement, it’s an upgrade in both form and function. Fabricated from high-quality aluminum and powder coated for a clean, customized finish, this tank brings serious visual appeal under the hood. Whether you’re building a show truck or just want something more durable and dependable, this tank fits the bill. It installs right into the factory location with no additional modifications, using all OEM mounting points for a hassle-free install. The included billet aluminum cap and integrated sight glass give you not only great style but practical functionality. It’s everything you need to keep your cooling system efficient and your truck looking sharp.\u003c\/p\u003e\n\u003ch4\u003eDesigned For Direct Fitment And Long Term Durability\u003c\/h4\u003e\n\u003cp\u003eThe Wehrli 100433 Coolant Tank Kit is engineered for 2017-2019 GM Silverado and Sierra HD trucks equipped with the 6.6L Duramax L5P engine. Built from fabricated aluminum, this coolant reservoir offers improved strength and heat resistance compared to the stock plastic tank. Its design incorporates an integrated sight glass for quick and easy coolant level checks, and it comes pre-fitted with a low coolant sensor for added safety and performance monitoring. The kit also includes a billet black anodized aluminum cap, overflow hose, and all necessary installation hardware. It’s designed to mount in the OEM tank location without requiring any additional modifications, making it a straightforward swap using standard hand tools. The powder-coated finish adds corrosion resistance and a custom touch to your engine bay. Whether for reliability or aesthetics, this tank delivers a clean, functional upgrade that blends seamlessly into the factory layout.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2017, 2018, 2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2017-2019 Duramax L5P engines\u003c\/li\u003e\n\u003cli\u003eReplaces factory plastic coolant reservoir\u003c\/li\u003e\n\u003cli\u003eMounts directly in the OEM tank location\u003c\/li\u003e\n\u003cli\u003eNo modifications required for installation\u003c\/li\u003e\n\u003cli\u003eUses original factory mounting points\u003c\/li\u003e\n\u003cli\u003eIncludes black anodized billet aluminum cap\u003c\/li\u003e\n\u003cli\u003eFabricated aluminum construction with powder-coated finish\u003c\/li\u003e\n\u003cli\u003eIntegrated sight glass for easy coolant level checks\u003c\/li\u003e\n\u003cli\u003eComes with low coolant level sensor pre-installed\u003c\/li\u003e\n\u003cli\u003eIncludes overflow hose and all necessary hardware\u003c\/li\u003e\n\u003cli\u003eInstalls with basic hand tools in standard setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Gloss Black","offer_id":49527197368604,"sku":"WCF100433-GB","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Flourescent Orange","offer_id":51294193811740,"sku":"WCF100433-FO","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Fine Texture Black","offer_id":51294193844508,"sku":"WCF100433-FTB","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Grape Frost","offer_id":51294193877276,"sku":"WCF100433-GF","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Gun Metal","offer_id":51294193910044,"sku":"WCF100433-GM","price":493.73,"currency_code":"USD","in_stock":true},{"title":"WCFab Grey","offer_id":51294193942812,"sku":"WCF100433-GRY","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Gloss White","offer_id":51294193975580,"sku":"WCF100433-GW","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Illusion Blueberry","offer_id":51294194008348,"sku":"WCF100433-IBB","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Illusion Purple","offer_id":51294194041116,"sku":"WCF100433-IP","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Kiwi Green","offer_id":51294194073884,"sku":"WCF100433-KIWI","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Orange Frost","offer_id":51294194106652,"sku":"WCF100433-OF","price":503.43,"currency_code":"USD","in_stock":true},{"title":"WCFab Red","offer_id":51294194139420,"sku":"WCF100433-RED","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Sparkle Bomber Orange","offer_id":51294194172188,"sku":"WCF100433-SBO","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Sparkle Copper","offer_id":51294194204956,"sku":"WCF100433-SC","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Semi-Gloss Black","offer_id":51294194237724,"sku":"WCF100433-SGB","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Sparkle Granny Smith","offer_id":51294194270492,"sku":"WCF100433-SGS","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Shocker Yellow","offer_id":51294194303260,"sku":"WCF100433-SY","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Bengal Blue","offer_id":51294194336028,"sku":"WCF100433-BB","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Blueberry Frost","offer_id":51294194368796,"sku":"WCF100433-BBF","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Bronze Chrome","offer_id":51294194401564,"sku":"WCF100433-BC","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Bengal Grey","offer_id":51294194434332,"sku":"WCF100433-BG","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Bengal Red","offer_id":51294194467100,"sku":"WCF100433-BR","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Brizzle Blue","offer_id":51294194499868,"sku":"WCF100433-BRZ","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Bengal Silver","offer_id":51294194532636,"sku":"WCF100433-BS","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Cat Yellow","offer_id":51294194565404,"sku":"WCF100433-CAT","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Candy Blue","offer_id":51294194598172,"sku":"WCF100433-CB","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Cherry Frost","offer_id":51294194630940,"sku":"WCF100433-CF","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Candy Purple","offer_id":51294194663708,"sku":"WCF100433-CP","price":503.43,"currency_code":"USD","in_stock":true},{"title":"Candy Red","offer_id":51294194696476,"sku":"WCF100433-CR","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Chevy Orange","offer_id":51294194729244,"sku":"WCF100433-CRO","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Candy Teal","offer_id":51294194762012,"sku":"WCF100433-CT","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Deore Gold","offer_id":51294194794780,"sku":"WCF100433-DG","price":517.98,"currency_code":"USD","in_stock":true},{"title":"Flat Black","offer_id":51294194827548,"sku":"WCF100433-FB","price":493.73,"currency_code":"USD","in_stock":true},{"title":"Fluorescent Green","offer_id":51294194860316,"sku":"WCF100433-FG","price":503.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/WCF100433_20_1.jpg?v=1722345806"},{"product_id":"ppe-119020092-2-oem-coolant-hose-drain-14-bung","title":"PPE 119020092 2\" inch OEM Coolant Hose Drain 1\/4 inch Bung | Universal","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits standard 2-inch OEM coolant hoses\u003c\/li\u003e\n\u003cli\u003e1\/4-inch NPT bung for easy draining\u003c\/li\u003e\n\u003cli\u003eAdds drain to systems with no drain\u003c\/li\u003e\n\u003cli\u003eNo cutting or welding needed to install\u003c\/li\u003e\n\u003cli\u003eMade from corrosion-resistant 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eIncludes durable stainless steel clamps\u003c\/li\u003e\n\u003cli\u003eSmooth beaded ends prevent hose leaks\u003c\/li\u003e\n\u003cli\u003eSimple and quick installation with basic tools\u003c\/li\u003e\n\u003cli\u003eGreat for routine coolant changes or flushes\u003c\/li\u003e\n\u003cli\u003eBacked by limited lifetime PPE warranty\u003c\/li\u003e\n\u003cli\u003eIdeal for clean, mess-free coolant service\u003c\/li\u003e\n\u003cli\u003eUniversal fit for a wide range of vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMake Coolant Maintenance Easy And Mess Free\u003c\/h4\u003e\n\u003cp\u003eIf you’ve ever struggled to drain your coolant without making a mess or fighting with factory clamps, the PPE Coolant Hose Drain is the fix you didn’t know you needed. This smart little upgrade installs directly into any 2-inch OEM coolant hose and gives you a reliable, reusable drain point right where you want it. No more cutting into lines, rigging up makeshift drains, or letting coolant pour all over your driveway. Just crack the 1\/4-inch NPT plug, and you’re draining clean and controlled. It’s built from corrosion-resistant 304 stainless steel, so it holds up to heat, pressure, and time without breaking a sweat. And with the included stainless clamps and smooth beaded ends, you can count on a leak-free seal every time. Whether you're doing regular service or a full system flush, this kit turns a hassle into a breeze and keeps your hands, and your shop, clean.\u003c\/p\u003e\n\u003ch4\u003eDesigned To Add Function Without Compromising Integrity\u003c\/h4\u003e\n\u003cp\u003eThe PPE 2-inch OEM Coolant Hose Drain with 1\/4-inch NPT Bung is engineered to offer precision, simplicity, and durability where it counts. Built from 304 stainless steel, it’s highly resistant to rust and corrosion even in long-term coolant exposure and harsh under hood environments. The fitting features smooth beaded ends that improve hose grip and reduce the risk of leaks over time, especially under pressure. Its 1\/4-inch NPT bung provides a dependable access point for draining coolant without needing to cut hoses or disassemble hard-to-reach factory connections. Installation requires no welding or fabrication and can be done with basic tools right in your garage. The included stainless steel clamps ensure a secure fit that stays put through heat cycles and vibration. Whether you're installing it as part of a new cooling system build or retrofitting it to simplify future service, this drain adds serious value without overcomplicating the job. It’s a simple, effective tool for clean and consistent coolant maintenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e Universal\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2-inch OEM coolant hoses in most vehicles\u003c\/li\u003e\n\u003cli\u003eUniversal design works across a wide range of applications\u003c\/li\u003e\n\u003cli\u003eDesigned to add a drain point to non-drain systems\u003c\/li\u003e\n\u003cli\u003e1\/4-inch NPT bung allows quick and easy draining\u003c\/li\u003e\n\u003cli\u003eNo cutting or welding required for installation\u003c\/li\u003e\n\u003cli\u003eConstructed from corrosion-resistant 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eMagnetic properties help protect against rust over time\u003c\/li\u003e\n\u003cli\u003eIdeal for routine coolant servicing and system flushes\u003c\/li\u003e\n\u003cli\u003eInstalls easily with supplied stainless steel clamps\u003c\/li\u003e\n\u003cli\u003eBeaded ends help maintain a strong leak-resistant seal\u003c\/li\u003e\n\u003cli\u003eBuilt to handle long-term use in high-heat environments\u003c\/li\u003e\n\u003cli\u003eCovered by a limited lifetime PPE warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527210377500,"sku":"PPE119020092","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/119020092.jpg?v=1722359532"},{"product_id":"17-19-gm-2500-3500hd-66l-duramax-l5p-wehrli-upper-coolant-pipe-kit-wcf100742","title":"Wehrli 100742 Upper Coolant Pipe Kit | 2017-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \n\n\u003cul\u003e\n  \u003cli\u003eFits 2017–2019 L5P Duramax engines\u003c\/li\u003e\n  \u003cli\u003eReplaces weak OEM rubber coolant hose\u003c\/li\u003e\n  \u003cli\u003eDurable aluminum coolant pipe construction\u003c\/li\u003e\n  \u003cli\u003eIncludes silicone boots and T-bolt clamps\u003c\/li\u003e\n  \u003cli\u003eCompatible with OEM GM radiators only\u003c\/li\u003e\n  \u003cli\u003ePowder coated in your color of choice\u003c\/li\u003e\n  \u003cli\u003eImproves reliability and engine bay appearance\u003c\/li\u003e\n  \u003cli\u003eWithstands high heat and pressure conditions\u003c\/li\u003e\n  \u003cli\u003eDesigned for a clean and direct fit\u003c\/li\u003e\n  \u003cli\u003eIdeal for performance and towing applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e Take Control Of Your Cooling System In Style \u003c\/h4\u003e \n\n\u003cp\u003e If you’re tired of the stock rubber upper coolant hose flexing, bulging, or just looking out of place in your engine bay, the Wehrli 100742 Upper Coolant Pipe Kit is a solid upgrade you’ll appreciate every time you lift the hood. Built for 2017–2019 GM 2500HD and 3500HD trucks with the 6.6L L5P Duramax, this kit replaces the OEM hose with a durable aluminum pipe that doesn’t just perform better, it looks a whole lot better too. It comes powder coated in the color of your choice, letting you match your engine bay theme or add a bold pop under the hood. This is more than just a cosmetic upgrade though. With reinforced silicone boots and high-quality T-bolt clamps included, you’re getting a complete kit that’s made to handle serious temperature and pressure without backing down. Whether you're daily driving, towing, or adding performance mods, this is a small change that brings big value. It’s the kind of upgrade that makes sense on every level, performance, durability, and visual appeal. \u003c\/p\u003e \n\n\u003ch4\u003e Built For Precision Fit And Long Lasting Strength \u003c\/h4\u003e \n\n\u003cp\u003e The Wehrli 100742 Upper Coolant Pipe Kit is engineered to deliver a precise and reliable upgrade for the factory upper coolant hose on 2017–2019 L5P Duramax engines. The OEM rubber hose is known to degrade over time under heat and pressure, making this aluminum replacement a more stable and long-lasting solution. Constructed from high-grade aluminum, the pipe resists flexing and expansion, helping maintain consistent coolant flow across varying operating conditions. Each kit includes heavy-duty silicone boots and T-bolt clamps that offer superior clamping force and leak prevention, even under extreme temperatures. The powder coated finish not only enhances corrosion resistance but also provides a clean, custom look. This pipe is designed to fit seamlessly with OEM GM radiators, so it installs with minimal effort and no guesswork. However, compatibility with aftermarket radiators may vary, so it’s important to confirm your setup before installation. This kit is ideal for those who want a no-nonsense cooling system upgrade that blends performance and durability with a custom-built appearance.\u003c\/p\u003e \n\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2017, 2018, 2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax L5P\u003c\/p\u003e \n\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n  \u003cli\u003eDesigned to fit 2017–2019 L5P Duramax engines only\u003c\/li\u003e\n  \u003cli\u003eReplaces the OEM rubber upper coolant hose\u003c\/li\u003e\n  \u003cli\u003eKit includes pipe, silicone boots, and T-bolt clamps\u003c\/li\u003e\n  \u003cli\u003eIntended for use with factory GM radiators\u003c\/li\u003e\n  \u003cli\u003eFitment issues may occur with aftermarket radiators\u003c\/li\u003e\n  \u003cli\u003ePowder coated finish available in multiple colors\u003c\/li\u003e\n  \u003cli\u003eOffers both performance and visual engine bay enhancement\u003c\/li\u003e\n  \u003cli\u003eNot 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function\u003c\/li\u003e\n\u003cli\u003eEliminates poor sensor connection issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCreates a Better Connection\u003c\/h4\u003e\n\u003cp\u003eIf you're chasing down fuel pressure codes or dealing with a flickering check engine light, it might not be the sensor, it could be the connector. The Fleece MAP Sensor and Airbox Control Valve Pigtail is a reliable fix for common wiring issues on 2017–2024 GM 6.6L Duramax L5P trucks and 2013–2018 Ram 6.7L Cummins models. Whether you're working on the MAP sensor, fuel rail pressure sensor, or the airbox solenoid, this replacement pigtail is designed to restore solid electrical contact and eliminate trouble codes tied to poor or corroded connections. This is more than just a quick patch, it’s a high-quality solution built to OEM standards. Fleece manufactures this pigtail in-house using fully automated equipment to ensure precision cuts and consistent crimping. That means you get a clean, professional-grade connection without the guesswork. It comes with a 6-inch lead, giving you plenty of room to splice into your harness and get your truck back on the road without delay.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 GM 6.6L Duramax\u003c\/li\u003e\n\u003cli\u003e2013, 2014, 2015, 2016, 2017, 2018 Dodge 6.7L Cummins\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect-fit replacement for OEM MAP and solenoid connectors.\u003c\/li\u003e\n\u003cli\u003eFixes common DTCs like P0087, P0191, and P228D on L5P Duramax models.\u003c\/li\u003e\n\u003cli\u003eAddresses airbox solenoid connection faults on 2013–2018 6.7L Cummins engines.\u003c\/li\u003e\n\u003cli\u003eCompatible with GM part numbers including 85518225 and ACDelco PT3744.\u003c\/li\u003e\n\u003cli\u003eRecommended solution for vehicles affected by TSB 20-NA-197.\u003c\/li\u003e\n\u003cli\u003eIncludes a 6-inch pre-terminated pigtail for flexible installation.\u003c\/li\u003e\n\u003cli\u003eManufactured in-house by Fleece using automated equipment.\u003c\/li\u003e\n\u003cli\u003eHigh-quality crimping ensures consistent and reliable electrical contact.\u003c\/li\u003e\n\u003cli\u003eRestores proper signal function to prevent sensor-related trouble codes.\u003c\/li\u003e\n\u003cli\u003eEliminates intermittent or failed connections due to corrosion or damage.\u003c\/li\u003e\n\u003cli\u003eWorks with both GM L5P Duramax and Ram Cummins OEM wiring systems.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fleece Performance Products","offers":[{"title":"Default Title","offer_id":49527284826396,"sku":"FLCFPE-HAR-MU-PT-7","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/FPE-HAR-MU-PT-7_1.png?v=1722345860"},{"product_id":"01-22-gm-sierrasilverado-wehrli-billet-heater-core-fitting-w-hose","title":"Wehrli 100699 Billet Heater Core Fitting with Hose | Universal","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePre-formed 1\/2\" heater hose assembly\u003c\/li\u003e\n\u003cli\u003eBillet aluminum quick-connect fitting\u003c\/li\u003e\n\u003cli\u003eReplaces leak-prone OEM fitting\u003c\/li\u003e\n\u003cli\u003eServiceable O-Rings\u003c\/li\u003e\n\u003cli\u003eStraightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEnsure Leak-Free Operation with Wehrli Custom Fab\u003c\/h4\u003e\n\u003cp\u003eThe factory heater core fitting equipped on your truck is likely prone to leaking after years of use; so when it does, you'll need a high-quality replacement that's built to last. Fortunately, Wehrli Custom Fab has the solution with their Billet Heater Core Fitting with Hose! This high-quality, pre-formed heater hose assembly replaces the OEM fitting with a much more durable unit that comes ready to perform right out of the box. This kit comes standard with billet aluminum quick-connect fittings along with serviceable O-Rings which allow for easy maintenance procedures without compromise. The included hose is even built stronger over stock, giving you more peace of mind when your applications become extreme. 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The PPE Fan Clutch Delete Nut gives you the clean, reliable solution your build deserves without dealing with bulky OEM parts you’re not using. Whether you're running an external electric fan for better airflow or doing a full custom engine bay, this delete nut helps simplify and clean up the front of your engine. With billet 15-5 stainless steel construction, you’re getting long-term corrosion resistance and strength you can trust. It threads on precisely and looks just as good as it functions, making it a smart addition for both form and function. PPE designed this part with real-world applications in mind, so whether you're working on a street truck or a track beast, this delete nut handles it. And with fitment spanning 2001 to 2025 GM 6.6L Duramax engines, you know it’s got wide support. This is one of those small upgrades that make a big impact.\u003c\/p\u003e\n\u003ch4\u003ePrecision Fit Built For Custom Applications\u003c\/h4\u003e\n\u003cp\u003eThe PPE Fan Clutch Delete Nut is engineered for builders who need exact performance without compromise. Designed with an M36-2.0 thread size, it perfectly replaces the factory fan clutch when it's no longer needed in your cooling configuration. Constructed from billet 15-5 stainless steel, it offers exceptional tensile strength and resistance to corrosion, making it a reliable component in demanding environments. Its CNC machined profile ensures a snug, vibration-resistant fit, eliminating the worry of loosening over time. Whether you're outfitting a marine application or switching to a high-performance electric fan system, this part is built to meet the needs of serious custom work. Compatible with all GM 6.6L Duramax engines from 2001 to 2025, it’s versatile enough for a range of diesel projects. PPE includes a one year limited warranty for added confidence, and the installation is as straightforward as it gets. For builders who expect precision, durability, and simplicity, this delete nut checks every box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for custom cooling applications\u003c\/li\u003e\n\u003cli\u003eEliminates the factory fan clutch assembly entirely\u003c\/li\u003e\n\u003cli\u003eIdeal for vehicles using electric or external fans\u003c\/li\u003e\n\u003cli\u003eConstructed from billet 15-5 stainless steel\u003c\/li\u003e\n\u003cli\u003eEngineered for high durability and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFeatures an M36-2.0 thread size for proper fitment\u003c\/li\u003e\n\u003cli\u003eCNC machined for a precise and secure install\u003c\/li\u003e\n\u003cli\u003eNot compatible with factory fan setups\u003c\/li\u003e\n\u003cli\u003eBest suited for off-road, marine, or racing applications\u003c\/li\u003e\n\u003cli\u003eFits all 6.6L Duramax engines from 2001–2025\u003c\/li\u003e\n\u003cli\u003eIncludes a 1-year limited manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527578493212,"sku":"PPE119100100","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe_20119100100_01.jpg?v=1722359554"},{"product_id":"ppe-518001000-weld-on-billet-radiator-neck-universal","title":"PPE 518001000 Weld-On Billet Radiator Neck | Universal","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePerfect for custom radiator overflow tanks\u003c\/li\u003e\n\u003cli\u003e1\/8in NPT to 1\/4in Hose Vent Fitting\u003c\/li\u003e\n\u003cli\u003e6061-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003e1 year limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuilt for Custom Applications\u003c\/h4\u003e\n\u003cp\u003eThose who are routing multiple turbochargers know that it can be complicated and bulky. Luckily PPE offers their Weld-On Billet Radiator Neck to construct your own overflow tank to make the job significantly easier. Whether you are building a high-performance race truck, a custom build, or simply to ensure long-lasting durability, PPE's billet radiator neck is a worthwhile upgrade.\u003c\/p\u003e\n\u003ch4\u003eHigh Quality Aluminum Construction\u003c\/h4\u003e\n\u003cp\u003ePPE's Weld-On Billet Radiator Neck is precision machined from 6061-T6 Aluminum to ensure long lasting and durable functionality for your custom radiator applications. Billet Aluminum allows for greater thermal conductivity and resistance to high temperatures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Universal\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor use with a Stant Lev-R-Vent\u003c\/li\u003e\n\u003cli\u003e16lbs. cap for Duramax applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527583736092,"sku":"PPE518001000","price":22.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe_20518001000_01.jpg?v=1722359984"},{"product_id":"ppe-119030100-304-stainless-steel-coolant-tube-pump-to-oil-cooler-01-24-gm-66l-duramax","title":"PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRaw Finish\u003c\/li\u003e\n\u003cli\u003eSpecifically designed for use with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange.\u003c\/li\u003e\n\u003cli\u003eSuperior to OEM mild steel pipe, which is prone to rusting and leaking.\u003c\/li\u003e\n\u003cli\u003eEnsures a precise fit and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRobust \u0026amp; Reliable\u003c\/h4\u003e\n\u003cp\u003eUpgrade your engine's reliability with this premium coolant pipe, specifically designed for use with the factory oil cooler filter housing. Custom fabricated with a heavy-duty flange, this coolant pipe ensures a secure and durable connection. Constructed from 304 stainless steel, it offers superior resistance to corrosion, preventing the rusting and leaking issues commonly associated with OEM mild steel pipes. Enhance your vehicle's performance and longevity with this robust and reliable coolant pipe, engineered for optimal functionality and long-lasting performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2025 Silverado\/Sierra 2500HD \u0026amp; 3500HD with 6.6L Duramax.\u003c\/li\u003e\n\u003cli\u003eDesigned to work with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel to resist rust and corrosion.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange provides a secure, leak-free seal.\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM mild steel pipe prone to failure.\u003c\/li\u003e\n\u003cli\u003eRaw finish offers a simple, durable look.\u003c\/li\u003e\n\u003cli\u003eImproves long-term reliability of the cooling system.\u003c\/li\u003e\n\u003cli\u003eEngineered for a precise fit, no modifications required.\u003c\/li\u003e\n\u003cli\u003eIdeal for stock or performance-built Duramax trucks.\u003c\/li\u003e\n\u003cli\u003eHelps protect engine by reducing risk of coolant leaks.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527590977820,"sku":"PPE119030100","price":197.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe119030100_6.jpg?v=1743084820"},{"product_id":"ppe-119030130-304-stainless-steel-coolant-tube-pump-to-oil-cooler-01-24-gm-66l-duramax","title":"PPE 119030130 Polished 304 Stainless Steel Coolant Tube (pump to oil cooler) | 2001-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePolished Finish\u003c\/li\u003e\n\u003cli\u003eSpecifically designed for use with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange.\u003c\/li\u003e\n\u003cli\u003eSuperior to OEM mild steel pipe, which is prone to rusting and leaking.\u003c\/li\u003e\n\u003cli\u003eEnsures a precise fit and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRobust \u0026amp; Reliable\u003c\/h4\u003e\n\u003cp\u003eEnhance your engine's reliability with our premium coolant pipe, expertly designed to integrate seamlessly with the factory oil cooler filter housing. Featuring a custom-fabricated, heavy-duty flange, this coolant pipe guarantees a secure and robust connection, ensuring your vehicle operates at its best. Crafted from 304 stainless steel, this coolant pipe offers exceptional resistance to corrosion, effectively preventing the rust and leaks that often plague OEM mild steel pipes. Upgrade your vehicle's performance and longevity with this durable and reliable coolant pipe, engineered for optimal functionality and enduring performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2025 Silverado\/Sierra 2500HD \u0026amp; 3500HD with 6.6L Duramax.\u003c\/li\u003e\n\u003cli\u003eDesigned to work with the factory oil cooler filter housing.\u003c\/li\u003e\n\u003cli\u003eMade from 304 stainless steel for superior corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty flange ensures a strong, leak-free connection.\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM mild steel pipe prone to rust and failure.\u003c\/li\u003e\n\u003cli\u003eProvides long-term reliability and reduced maintenance concerns.\u003c\/li\u003e\n\u003cli\u003ePolished finish adds durability and a clean engine bay look.\u003c\/li\u003e\n\u003cli\u003eRecommended for stock or performance-built Duramax trucks.\u003c\/li\u003e\n\u003cli\u003eUpgrades cooling system integrity and overall engine protection.\u003c\/li\u003e\n\u003cli\u003eBuilt for a precise fit, no modifications required.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527591371036,"sku":"PPE119030130","price":197.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe119030130_2.jpg?v=1743084746"},{"product_id":"fleece-fpe-dmax-ocadpt","title":"Fleece FPE-DMAX-OCADPT Duramax Oil Cooler Adapter | 2001-2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFixes common Duramax oil leaks\u003c\/li\u003e\n\u003cli\u003eIntegral square cut seal design\u003c\/li\u003e\n\u003cli\u003eEliminates factory metal gasket\u003c\/li\u003e\n\u003cli\u003eProvides improved long term sealing\u003c\/li\u003e\n\u003cli\u003eReduces oil cooler flex leaks\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on replacement\u003c\/li\u003e\n\u003cli\u003eSlotted holes ease installation\u003c\/li\u003e\n\u003cli\u003eOEM fit and factory alignment\u003c\/li\u003e\n\u003cli\u003eFits 2001-2019 Duramax engines\u003c\/li\u003e\n\u003cli\u003eReplaces GM oil adapter numbers\u003c\/li\u003e\n\u003cli\u003eHigh quality Fleece Performance construction\u003c\/li\u003e\n\u003cli\u003eOne year limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eA Simple Upgrade That Puts An End To Oil Leaks\u003c\/h4\u003e\n\u003cp\u003eIf you have owned a Duramax long enough, you know how frustrating oil cooler leaks can be once they start. The factory adapter relies on a thin metal gasket that eventually gives up as the oil cooler flexes with heat cycles and vibration. Fleece Performance designed this oil cooler adapter to eliminate that weak point and restore confidence under the hood. The integrated square cut seal provides a far more reliable seal that holds up over time, even on high mileage or hard working trucks. Additionally, the adapter installs as a direct replacement, so there is no guesswork or custom fitting involved. Slotted mounting holes make alignment easier during installation, saving time and reducing frustration. It is a smart upgrade for anyone who wants to fix the problem once instead of chasing recurring leaks.\u003c\/p\u003e\n\u003ch4\u003eEngineered To Improve Sealing On Duramax Oil Coolers\u003c\/h4\u003e\n\u003cp\u003eFrom a technical standpoint, this Fleece Performance oil cooler adapter is designed to address a known failure point in the Duramax oiling system. Rather than relying on a separate metal gasket, the adapter uses an integral square cut seal ring at the oil cooler mating surface. This design helps maintain consistent sealing pressure as the cooler expands and contracts during normal engine operation. Furthermore, the adapter is machined to bolt directly in place of the factory unit and replaces GM part numbers 97941206 and 12684475. It is compatible with 2001-2007 and 2011-2019 6.6L Duramax engines, making it a versatile solution across multiple generations. The slotted mounting holes allow for slight adjustment, which helps ensure proper fitment and reduces installation issues. Backed by a one year limited warranty, this adapter offers a practical and long lasting improvement over the original design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LB7\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned to fix a known factory oil cooler leak issue.\u003c\/li\u003e\n\u003cli\u003eReplaces the factory metal gasket with a sealed adapter.\u003c\/li\u003e\n\u003cli\u003eUses an integrated square cut seal ring.\u003c\/li\u003e\n\u003cli\u003eDirect replacement for specific GM oil adapters.\u003c\/li\u003e\n\u003cli\u003eCompatible with select Duramax model years only.\u003c\/li\u003e\n\u003cli\u003eFits 2001-2007 and 2011-2019 engines.\u003c\/li\u003e\n\u003cli\u003eSlotted mounting holes aid installation alignment.\u003c\/li\u003e\n\u003cli\u003eNo additional sealing gasket required.\u003c\/li\u003e\n\u003cli\u003eIntended as a permanent leak prevention solution.\u003c\/li\u003e\n\u003cli\u003eIdeal for high mileage or leaking engines.\u003c\/li\u003e\n\u003cli\u003eIncludes one year limited parts warranty.\u003c\/li\u003e\n\u003cli\u003eprop 65 warning label.\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for best results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"file:\/\/\/C:\/Users\/edgar.ramirez\/Downloads\/FPE-2021-52_FPE-DMAX-OCADPT.pdf\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Fleece Performance Products","offers":[{"title":"Default Title","offer_id":53854934303004,"sku":"FLCFPE-DMAX-OCADPT","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/fpe-dmax-ocadpt-f1.png?v=1770065840"},{"product_id":"fleece-fpe-dmax-cbop-billet-coolant-block-off-plate-2001-2025-gm-silverado-sierra-2500hd-3500hd-6-6l-duramax","title":"Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBillet aluminum construction for durability\u003c\/li\u003e\n\u003cli\u003eIntegrated O-ring, no gasket required\u003c\/li\u003e\n\u003cli\u003eEliminates common coolant leaks\u003c\/li\u003e\n\u003cli\u003eThicker than factory plate design\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part numbers\u003c\/li\u003e\n\u003cli\u003ePrecision machined for exact fit\u003c\/li\u003e\n\u003cli\u003eCorrosion resistant billet finish\u003c\/li\u003e\n\u003cli\u003eDesigned for 6.6L Duramax engines\u003c\/li\u003e\n\u003cli\u003eFits 2001-2025 Silverado\/Sierra HD models\u003c\/li\u003e\n\u003cli\u003eSimple bolt-on installation\u003c\/li\u003e\n\u003cli\u003eImproves long-term engine reliability\u003c\/li\u003e\n\u003cli\u003eBacked by one-year limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePut An End To Duramax Coolant Leaks For Good\u003c\/h4\u003e\n\u003cp\u003eIf you have ever dealt with a slow coolant leak at the rear of your Duramax, you already know how frustrating it can be to track down and fix. This billet coolant block off plate from Fleece Performance is built to solve that problem with confidence and keep it from coming back. The factory plate is known to weaken over time, which leads to seepage and repeat repairs that no one wants to deal with. This upgraded design is thicker and far more durable, giving you peace of mind every time you fire up your truck. Additionally, the integrated O-ring eliminates the need for a traditional gasket, which is often the weak point in sealing surfaces. Installation is straightforward, making it an easy upgrade when you are already working in that area of the engine. Once installed, you can count on a tighter seal and a cleaner engine bay without the constant worry of leaks. It is a simple upgrade that makes a noticeable difference in long term reliability.\u003c\/p\u003e\n\u003ch4\u003ePrecision Machined Upgrade Designed For Long Term Sealing Performance\u003c\/h4\u003e\n\u003cp\u003eBuilt from high quality billet aluminum, this coolant block off plate is engineered to outperform the stock stamped component in both strength and sealing capability. The increased thickness adds rigidity, which helps maintain consistent clamping force across the sealing surface under heat and pressure. Furthermore, the integrated square cut O-ring is designed to provide a more reliable seal compared to traditional flat gaskets that can degrade over time. This design reduces the chances of coolant seepage, especially in high mileage or heavily used engines. It is a direct replacement for OEM part numbers 97941204 and 12698239, ensuring proper fitment on 2001-2025 GM Silverado and Sierra 2500HD and 3500HD models equipped with the 6.6L Duramax. The precision machining process ensures a tight, accurate fit that aligns perfectly with factory mounting points. Corrosion resistance is another key benefit, helping the plate hold up in harsh engine bay conditions. Backed by a one year limited warranty, this component delivers both performance and confidence where it matters most.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces known leak-prone factory rear cover plate\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Duramax rear engine location\u003c\/li\u003e\n\u003cli\u003eUses integrated O-ring instead of traditional gasket\u003c\/li\u003e\n\u003cli\u003eEnsure proper surface cleaning before installation\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part numbers listed\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple Duramax model years\u003c\/li\u003e\n\u003cli\u003eIdeal during rear engine or transmission service\u003c\/li\u003e\n\u003cli\u003eBillet design differs from factory stamped steel\u003c\/li\u003e\n\u003cli\u003eCheck O-ring condition before final install\u003c\/li\u003e\n\u003cli\u003eCovered by one year limited parts warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fleece Performance Products","offers":[{"title":"Default Title","offer_id":54039381901596,"sku":"FLCFPE-DMAX-CBOP","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/plate1.jpg?v=1776182584"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/collections\/GM_Duramax_Radiator_Thumb_1_52a7a844-4d96-41d2-8e1b-236cab2d11ed.jpg?v=1728596105","url":"https:\/\/www.alligatorperformance.com\/collections\/2017-2019-gm-2500hd-3500hd-duramax-66l-l5p-cooling-upgrades.oembed?page=2","provider":"Alligator Performance","version":"1.0","type":"link"}