{"title":"2020-2026 GM 2500HD\/3500HD 6.6L L5P Duramax Differential Covers","description":"\u003cdiv\u003e\n\u003cinput id=\"post-1\" class=\"read-more-state\" type=\"checkbox\"\u003e\n\u003cp class=\"read-more-wrap\"\u003e\u003cspan class=\"read-more-target\"\u003eMake your life easier by upgrading the differential cover on your 2020-2026 GM 2500HD\/3500HD 6.6L Duramax! These durable covers are designed to shield your truck's differential from rocks, debris, and harsh conditions, ensuring your driveline stays in top shape during heavy-duty applications. In addition to the added protection, many of these covers offer more fluid capacity and better heat dissipation, helping to improve the overall longevity and efficiency of your differential. Be sure to also check out our selection of \u003ca href=\"2020-2022-gm-duramax-66l-l5p-gear-packages\" title=\"2020-2024 GM 2500HD\/3500HD 6.6L L5P Duramax Gear Packages\" rel=\"noopener\" target=\"_blank\"\u003eGear Packages\u003c\/a\u003e and \u003ca href=\"2020-2022-gm-duramax-66l-l5p-differentials\" title=\"2020-2024 GM 2500HD\/3500HD 6.6L L5P Duramax Differentials\" rel=\"noopener\" target=\"_blank\"\u003eDifferentials\u003c\/a\u003e to ensure your GM 2500HD\/3500HD is fully equipped for any challenge that comes its way. \u003cspan class=\"headerspam\"\u003e\u003cstrong\u003eGM Duramax Fitments:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025, 2026 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\n\u003clabel class=\"read-more-trigger\" for=\"post-1\"\u003e\u003c\/label\u003e\n\u003c\/div\u003e","products":[{"product_id":"ppe-138041000-front-differential-cover-11-16-gm-6-6l-duramax","title":"PPE 138041000 Heavy Duty Cast Aluminum Front Differential Cover with Raw Finish | 2011-2025 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRaw finish for rugged, industrial look\u003c\/li\u003e\n\u003cli\u003eCast from A356-T6 heat-treated aluminum\u003c\/li\u003e\n\u003cli\u003eMassive internal and external cooling fins\u003c\/li\u003e\n\u003cli\u003eIncreases fluid capacity by 3\/4 quart\u003c\/li\u003e\n\u003cli\u003eNeodymium magnetic fill plug captures debris\u003c\/li\u003e\n\u003cli\u003e1\/8\" NPT port for temp sensor\u003c\/li\u003e\n\u003cli\u003eRetains OEM reusable gasket\u003c\/li\u003e\n\u003cli\u003eBoosts cooling and extends fluid life\u003c\/li\u003e\n\u003cli\u003eZinc-plated stainless hardware included\u003c\/li\u003e\n\u003cli\u003eImproves housing strength and durability\u003c\/li\u003e\n\u003cli\u003eCompatible with 2011–2025 GM HD trucks\u003c\/li\u003e\n\u003cli\u003eBacked by a limited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMajor Upgrade In Durability and Cooling Efficiency\u003c\/h4\u003e\n\u003cp\u003eIf you’re putting your heavy-duty GM truck to work, keeping the front differential cool and protected is a smart move, and that’s exactly where the PPE Heavy Duty Cast Aluminum Front Differential Cover shines. Built for 2011–2025 Silverado and Sierra 2500HD\/3500HD models, this cover is engineered to handle real-world abuse while helping extend the life of your front diff components, especially during long hauls, heavy towing, or tough trail days. This raw-finished version is all business. It’s cast from A356-T6 heat-treated aluminum, giving it excellent strength without the added weight of steel. What really sets it apart is the cooling capability. PPE didn’t hold back here, this cover is packed with some of the largest internal and external cooling fins in the industry. That means better heat dissipation, more stable fluid temps, and added confidence when you're pushing your truck in extreme conditions.\u003c\/p\u003e\n\u003ch4\u003eHolds More Fluid Over Stock\u003c\/h4\u003e\n\u003cp\u003eIt also holds three-quarters of a quart more fluid than stock, offering extra protection on those long drives or hot summer days. PPE includes a high-strength Neodymium magnetic fill plug, which helps pull harmful metal particles out of the oil before they can circulate through the gears and bearings. There’s even a 1\/8-inch port ready to accept a temperature probe if you’re monitoring temps through a gauge. Better yet, installation is straightforward, no need to source a special seal, since it’s designed to reuse the factory gasket. PPE also includes zinc-plated stainless hardware, so everything bolts up cleanly and resists corrosion down the road.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra\/Silverado 2500HD\/3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2011–2025 Silverado and Sierra 2500HD\/3500HD, check fitment first.\u003c\/li\u003e\n\u003cli\u003eRaw aluminum finish gives a rugged, industrial look.\u003c\/li\u003e\n\u003cli\u003eAdds 3\/4 quart of fluid for better cooling capacity.\u003c\/li\u003e\n\u003cli\u003eLarge cooling fins improve heat dissipation over stock.\u003c\/li\u003e\n\u003cli\u003eMagnetic fill plug traps metal debris to protect gears.\u003c\/li\u003e\n\u003cli\u003e1\/8-inch NPT port supports an optional temp sensor.\u003c\/li\u003e\n\u003cli\u003eUses factory gasket for a simple, clean install.\u003c\/li\u003e\n\u003cli\u003eZinc-plated stainless hardware resists corrosion.\u003c\/li\u003e\n\u003cli\u003eCast from heat-treated A356-T6 aluminum for strength.\u003c\/li\u003e\n\u003cli\u003eCovered by a limited lifetime warranty.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49526783148316,"sku":"PPE138041000","price":215.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/PPE138041000_20DIFF_20COVER_2000.jpg?v=1722359630"},{"product_id":"ppe-138041010-front-differential-cover-11-16-gm-6-6l-duramax","title":"PPE 138041010 Heavy Duty Cast Aluminum Front Differential Cover with Brushed Finish | 2011-2025 GM Silverado\/Sierra 2500HD\/3500HD","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-strength A356-T6 cast aluminum construction\u003c\/li\u003e\n\u003cli\u003eMassive internal and external cooling fins\u003c\/li\u003e\n\u003cli\u003eAdds 3\/4 quart of fluid capacity\u003c\/li\u003e\n\u003cli\u003eNeodymium magnetic fill plug traps metal\u003c\/li\u003e\n\u003cli\u003e1\/8\" port for temp sensor compatibility\u003c\/li\u003e\n\u003cli\u003eRetains factory-style reusable gasket\u003c\/li\u003e\n\u003cli\u003eImproves housing strength and heat dissipation\u003c\/li\u003e\n\u003cli\u003eZinc-plated stainless steel fasteners included\u003c\/li\u003e\n\u003cli\u003eBrushed finish for a clean, rugged look\u003c\/li\u003e\n\u003cli\u003eHelps reduce differential wear under load\u003c\/li\u003e\n\u003cli\u003eFits 2011–2025 GM 2500\/3500HD trucks\u003c\/li\u003e\n\u003cli\u003eBacked by a limited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdd More Durability to your HD GM Truck with PPE\u003c\/h4\u003e\n\u003cp\u003eIf you're looking to give your front differential a serious upgrade, the PPE Heavy Duty Cast Aluminum Front Differential Cover is built to deliver impressive durability and cooling performance. Designed for 2011–2025 Silverado and Sierra 2500HD\/3500HD trucks, this cover is more than just a cosmetic piece, it's engineered to protect your differential under heavy loads and high-heat conditions, whether you're towing, off-roading, or daily driving with a little extra weight on the axle. What really sets this cover apart is its massive cooling fin design, inside and out. PPE has packed it with the largest set of cast fins in the industry, helping to draw heat away from the fluid more efficiently than the factory stamped steel cover. It also holds an extra three-quarter quart of fluid, giving your front diff a little more thermal buffer on long hauls and during hard pulls. The added capacity and improved cooling help extend fluid life and reduce wear on critical components.\u003c\/p\u003e\n\u003ch4\u003ePremium Aluminum Construction with Magnetic Fill Plug\u003c\/h4\u003e\n\u003cp\u003eTo keep things clean inside the housing, PPE includes a high-powered Neodymium magnetic fill plug that pulls metallic particles from the oil before they can cycle through your gears and bearings. It also comes with a 1\/8-inch stainless port for a temp sensor, making it easy to monitor your fluid temps if you're running gauges. Install is straightforward and uses the factory reusable gasket, so there’s no need to mess with RTV or custom seals. The cover itself is cast from A356.0-T6 heat-treated aluminum, giving it excellent strength without adding unnecessary weight. It’s finished in a clean brushed aluminum look that pairs well with both stock and modified undercarriages. Included zinc-plated hardware rounds out the package, making this a complete bolt-on upgrade that’s both functional and good-looking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra\/Silverado 2500HD\/3500HD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2011–2025 Silverado and Sierra 2500HD\/3500HD, check fit before buying.\u003c\/li\u003e\n\u003cli\u003eAdds 3\/4 quart of fluid for better cooling capacity.\u003c\/li\u003e\n\u003cli\u003eLarge cooling fins pull heat away faster than stock covers.\u003c\/li\u003e\n\u003cli\u003eHelps extend fluid life and reduce gear wear under load.\u003c\/li\u003e\n\u003cli\u003eMagnetic fill plug traps harmful metal particles.\u003c\/li\u003e\n\u003cli\u003e1\/8-inch port allows for an optional temp sensor.\u003c\/li\u003e\n\u003cli\u003eReuses factory gasket, no RTV needed.\u003c\/li\u003e\n\u003cli\u003eCast from heat-treated A356-T6 aluminum for strength.\u003c\/li\u003e\n\u003cli\u003eIncludes zinc-plated hardware for a secure, rust-free install.\u003c\/li\u003e\n\u003cli\u003eBrushed aluminum finish adds a clean, rugged look.\u003c\/li\u003e\n\u003cli\u003eBacked by a limited lifetime warranty.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49526783213852,"sku":"PPE138041010","price":233.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/795-138041010.webp?v=1743007609"},{"product_id":"100114-20-24-silverado-sierra-25003500hd-r-19-23-ram-25003500-wehrli-rear-differential-cover","title":"Wehrli 100114 Rear Differential Cover | 2020-2026 GM Silverado\/Sierra 2500HD\/3500HD Duramax \u0026 2019-2024 Ram 2500\/3500","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFabricated from lightweight aluminum\u003c\/li\u003e\n\u003cli\u003eIncludes stainless steel hardware\u003c\/li\u003e\n\u003cli\u003eIntegrated fill plug for easy service\u003c\/li\u003e\n\u003cli\u003eImproves rear axle durability and style\u003c\/li\u003e\n\u003cli\u003eCustom powder coat color options available\u003c\/li\u003e\n\u003cli\u003eDirect replacement for factory cover\u003c\/li\u003e\n\u003cli\u003eCompatible with GM and Ram HD trucks\u003c\/li\u003e\n\u003cli\u003eBuilt for strength and heat resistance\u003c\/li\u003e\n\u003cli\u003eClean, low-profile design\u003c\/li\u003e\n\u003cli\u003ePrecision-welded construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCustom Differential Cover Add Style and Durability\u003c\/h4\u003e\n\u003cp\u003eIf you're looking to upgrade the rear end of your GM or Ram heavy-duty truck, the Wehrli Rear Differential Cover offers a clean, functional, and durable solution that stands out from stock. Built specifically for 2020–2026 Silverado\/Sierra 2500HD and 3500HD, as well as 2019–2026 Ram 2500 and 3500 trucks, this cover blends premium materials with a custom finish to give your rig both added protection and a serious visual upgrade. This isn’t your typical cast piece, it’s a fully fabricated aluminum cover, hand-welded for strength and designed to handle the demands of towing, hauling, or aggressive use. Unlike factory stamped steel or basic aftermarket options, this cover provides a higher level of durability while shedding some weight in the process. It's built to perform, but also looks sharp doing it.\u003c\/p\u003e\n\u003ch4\u003eHigh-Quality Hardware and Straightforward Install\u003c\/h4\u003e\n\u003cp\u003eWehrli includes stainless steel hardware for a clean, corrosion-resistant install, along with an integrated fill plug to make fluid service simple. You won’t have to remove the cover just to top off or check gear oil. And like all Wehrli components, this one comes finished in your choice of their signature custom powder coat colors, letting you match your truck's look or stand out with something bold. Whether you’re dressing up the axle, adding protection for hard use, or simply replacing a worn or rusted factory cover, this piece checks every box. It fits right, looks sharp, and is built to handle whatever you throw at it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2020, 2021, 2022, 2023, 2024, 2025, 2026 GM 2500HD\/3500HD\u003c\/li\u003e\n\u003cli\u003e2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 Ram 2500\/3500\u003c\/li\u003e\n\u003cli\u003eFits AAM 12\" Rear Differential\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2020–2026 GM 2500HD\/3500HD trucks\u003c\/li\u003e\n\u003cli\u003eFits 2019–2026 Ram 2500\/3500 trucks\u003c\/li\u003e\n\u003cli\u003eDesigned for AAM 11.5\" or 12\" rear axles\u003c\/li\u003e\n\u003cli\u003eWorks with both gas and diesel models\u003c\/li\u003e\n\u003cli\u003eDoes not fit 2025 Ram models unless verified\u003c\/li\u003e\n\u003cli\u003eReplaces MOPAR 68458937AB \/ 68458937AA covers\u003c\/li\u003e\n\u003cli\u003eAlso replaces GM part number 84757353\u003c\/li\u003e\n\u003cli\u003eMust confirm axle type before purchasing\u003c\/li\u003e\n\u003cli\u003eIntegrated fill plug allows easier fluid service\u003c\/li\u003e\n\u003cli\u003eOffered in custom powder coat color options\u003c\/li\u003e\n\u003cli\u003eIdeal for towing, hauling, and heavy-duty use\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wehrli Custom Fab","offers":[{"title":"Gloss Black","offer_id":49527167844636,"sku":"WCF100114-GB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Fine Texture Black","offer_id":51294157799708,"sku":"WCF100114-FTB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Gun Metal","offer_id":51294157865244,"sku":"WCF100114-GM","price":377.33,"currency_code":"USD","in_stock":true},{"title":"WCFab Grey","offer_id":51294157898012,"sku":"WCF100114-GRY","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Gloss White","offer_id":51294157930780,"sku":"WCF100114-GW","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Illusion Blueberry","offer_id":51294157963548,"sku":"WCF100114-IBB","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Illusion Purple","offer_id":51294157996316,"sku":"WCF100114-IP","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Kiwi Green","offer_id":51294158029084,"sku":"WCF100114-KIWI","price":377.33,"currency_code":"USD","in_stock":true},{"title":"WCFab Red","offer_id":51294158094620,"sku":"WCF100114-RED","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Sparkle Bomber Orange","offer_id":51294158127388,"sku":"WCF100114-SBO","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Sparkle Copper","offer_id":51294158160156,"sku":"WCF100114-SC","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Semi-Gloss Black","offer_id":51294158192924,"sku":"WCF100114-SGB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Sparkle Granny Smith","offer_id":51294158225692,"sku":"WCF100114-SGS","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Bengal Blue","offer_id":51294158291228,"sku":"WCF100114-BB","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Bronze Chrome","offer_id":51294158356764,"sku":"WCF100114-BC","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Bengal Grey","offer_id":51294158389532,"sku":"WCF100114-BG","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Bengal Red","offer_id":51294158422300,"sku":"WCF100114-BR","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Brizzle Blue","offer_id":51294158455068,"sku":"WCF100114-BRZ","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Bengal Silver","offer_id":51294158487836,"sku":"WCF100114-BS","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Cat Yellow","offer_id":51294158520604,"sku":"WCF100114-CAT","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Candy Red","offer_id":51294158651676,"sku":"WCF100114-CR","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Chevy Orange","offer_id":51294158684444,"sku":"WCF100114-CRO","price":377.33,"currency_code":"USD","in_stock":true},{"title":"Candy Teal","offer_id":51294158717212,"sku":"WCF100114-CT","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Deore Gold","offer_id":51294158749980,"sku":"WCF100114-DG","price":401.58,"currency_code":"USD","in_stock":true},{"title":"Flat Black","offer_id":51294158782748,"sku":"WCF100114-FB","price":377.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/100114_1.jpg?v=1722344920"},{"product_id":"ppe-138053010-115in12in-14-heavy-duty-cast-aluminum-rear-diff-cover-brushed-20-24-gm-66l-duramax","title":"PPE 138053010 11.5in\/12 inch - 14 Heavy Duty Cast Aluminum Rear Diff Cover - Brushed | 2020-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-grade A356.0-T6 heat treated cast aluminum alloy\u003c\/li\u003e\n\u003cli\u003eIncreases oil capacity by 1.43 quarts\u003c\/li\u003e\n\u003cli\u003eCompatible with both the 11.5” or 12” rear axle\u003c\/li\u003e\n\u003cli\u003eDesigned with specially engineered internal ribs to minimize friction and maximize lubrication\u003c\/li\u003e\n\u003cli\u003eDurable, heat-treated cast A356.0-T6 aluminum for optimum heat dissipation\u003c\/li\u003e\n\u003cli\u003eSignificant reduction in differential fluid temperatures\u003c\/li\u003e\n\u003cli\u003eAdds additional strength to the gear housing\u003c\/li\u003e\n\u003cli\u003eHigh-power Neodymium magnet equipped, billet 304 stainless steel fill plug\u003c\/li\u003e\n\u003cli\u003e1\/8-inch stainless steel NPT port for optional temperature probe\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eExceptional Strength \u0026amp; Cooling Capacity\u003c\/h4\u003e\n\u003cp\u003eCrafted for reduced friction and enhanced lubrication efficiency, ensure your GM rear differential stays cool and clean with an upgraded cover from PPE. Constructed from high-quality cast A356.0-T6 aluminum, it offers exceptional strength and superior heat dissipation capabilities. Couple this with PPE's exclusive fill plug which features a high-power Neodymium magnet that pulls harmful metal particles away from the gears before they do damage.\u003c\/p\u003e\n\u003ch4\u003eIncreased Fluid Capacity and Cooling Fins\u003c\/h4\u003e\n\u003cp\u003ePPEs Heavy Duty Cast Aluminum Rear Diff Cover Increased fluid capacity provides increased thermal stamina. This new cover is equipped with specially designed internal heat sinks and external cooling fins which increase the pan’s surface area helping dissipate heat. This keeps your differential oil running cooler, the oil will keep its viscosity which helps extend differential service life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2020, 2021, 2022, 2023, 2024, 2025 GM 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\u003eMade from heat-treated A356.0-T6 cast aluminum for strength and cooling.\u003c\/li\u003e\n\u003cli\u003eIncreases oil capacity by 1.43 quarts for better thermal stability.\u003c\/li\u003e\n\u003cli\u003eFits both 11.5-inch and 12-inch GM rear axles, verify your application before purchase.\u003c\/li\u003e\n\u003cli\u003eInternal ribs and external cooling fins improve lubrication and heat dissipation.\u003c\/li\u003e\n\u003cli\u003eHelps reduce differential fluid temperatures, extending service life.\u003c\/li\u003e\n\u003cli\u003eEquipped with a stainless steel fill plug containing a powerful Neodymium magnet to capture metal particles.\u003c\/li\u003e\n\u003cli\u003eIncludes 1\/8-inch NPT port for optional temperature probe installation.\u003c\/li\u003e\n\u003cli\u003eAdds strength to the gear housing compared to stock covers.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for 2020–2025 Silverado and Sierra 2500HD\/3500HD with 6.6L Duramax.\u003c\/li\u003e\n\u003cli\u003eBacked by a limited lifetime warranty for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527571644700,"sku":"PPE138053010","price":314.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe_20138053010_01.jpg?v=1722359645"},{"product_id":"ppe-138053020-115in12in-14-heavy-duty-cast-aluminum-rear-diff-cover-black-20-24-gm-66l-duramax","title":"PPE 138053020 11.5in\/12 inch - 14 Heavy Duty Cast Aluminum Rear Diff Cover - Black | 2020-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-grade A356.0-T6 heat treated cast aluminum alloy\u003c\/li\u003e\n\u003cli\u003eIncreases oil capacity by 1.43 quarts\u003c\/li\u003e\n\u003cli\u003eCompatible with both the 11.5” or 12” rear axle\u003c\/li\u003e\n\u003cli\u003eDesigned with specially engineered internal ribs to minimize friction and maximize lubrication\u003c\/li\u003e\n\u003cli\u003eDurable, heat-treated cast A356.0-T6 aluminum for optimum heat dissipation\u003c\/li\u003e\n\u003cli\u003eSignificant reduction in differential fluid temperatures\u003c\/li\u003e\n\u003cli\u003eAdds additional strength to the gear housing\u003c\/li\u003e\n\u003cli\u003eHigh-power Neodymium magnet equipped, billet 304 stainless steel fill plug\u003c\/li\u003e\n\u003cli\u003e1\/8-inch stainless steel NPT port for optional temperature probe\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eImpressive Strength \u0026amp; Cooling Capacity\u003c\/h4\u003e\n\u003cp\u003eCrafted for reduced friction and enhanced lubrication efficiency, ensure your GM rear differential stays cool and clean with an upgraded cover from PPE. Constructed from high-quality cast A356.0-T6 aluminum, it offers exceptional strength and superior heat dissipation capabilities. Couple this with PPE's exclusive fill plug which features a high-power Neodymium magnet that pulls harmful metal particles away from the gears before they do damage.\u003c\/p\u003e\n\u003ch4\u003eIncreases Fluid Capacity and Cooling Fins\u003c\/h4\u003e\n\u003cp\u003ePPEs Heavy Duty Cast Aluminum Rear Diff Cover Increased fluid capacity provides increased thermal stamina. This new cover is equipped with specially designed internal heat sinks and external cooling fins which increase the pan’s surface area helping dissipate heat. This keeps your differential oil running cooler, the oil will keep its viscosity which helps extend differential service life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 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 2020–2025 GM Silverado\/Sierra 2500HD and 3500HD 6.6L Duramax, confirm fit before purchase.\u003c\/li\u003e\n\u003cli\u003eAdds 1.43 quarts of extra oil capacity for better cooling and protection.\u003c\/li\u003e\n\u003cli\u003eInternal ribs and external fins improve lubrication and heat dissipation.\u003c\/li\u003e\n\u003cli\u003eHelps keep differential oil cooler and maintain viscosity under load.\u003c\/li\u003e\n\u003cli\u003eStrengthens the gear housing compared to stock covers.\u003c\/li\u003e\n\u003cli\u003eMagnetic fill plug captures metal particles to prevent gear damage.\u003c\/li\u003e\n\u003cli\u003eIncludes a 1\/8-inch NPT port for optional temp probe installation.\u003c\/li\u003e\n\u003cli\u003eMade from heat-treated A356.0-T6 cast aluminum for durability and heat control.\u003c\/li\u003e\n\u003cli\u003eEngineered to extend differential service life by reducing wear and heat stress.\u003c\/li\u003e\n\u003cli\u003eBacked by a limited lifetime warranty for added confidence.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527571710236,"sku":"PPE138053020","price":314.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe_20138053020_01.jpg?v=1722359646"},{"product_id":"ppe-138053000-115inch12inch-14-heavy-duty-cast-aluminum-rear-diff-cover-raw-20-24-gm-66l-duramax","title":"PPE 138053000 11.5in\/12 inch - 14 Heavy Duty Cast Aluminum Rear Diff Cover - Raw | 2020-2025 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-quality A356.0-T6 heat treated cast aluminum alloy\u003c\/li\u003e\n\u003cli\u003eIncreases oil capacity by 1.43 quarts\u003c\/li\u003e\n\u003cli\u003eCompatible with both the 11.5” or 12” rear axle\u003c\/li\u003e\n\u003cli\u003eDesigned with specially engineered internal ribs\u003c\/li\u003e\n\u003cli\u003eOptimum heat dissipation\u003c\/li\u003e\n\u003cli\u003eSignificant reduction in differential fluid temperatures\u003c\/li\u003e\n\u003cli\u003eAdds additional strength to the gear housing\u003c\/li\u003e\n\u003cli\u003eHigh-power Neodymium magnet drain plug\u003c\/li\u003e\n\u003cli\u003e1\/8-inch stainless steel NPT port for exceptional temperature probe\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAdds Strength and Enhances Cooling Capacity\u003c\/h4\u003e\n\u003cp\u003ePPE designed their Heavy-Duty Cast Aluminum Rear Diff Cover to add strength and improve cooling capabilities. By constructing their diff cover with high grade A356.0-T6 aluminum, they not only improve the strength over the OEM cover, but also the heat dissipation. Additionally, the increased fluid capacity offered by PPE's diff cover allows for greater thermal stamina. Designed with internal heat sinks and external cooling fins increases the covers surface area which also aids in dissipating heat. A cooler running differential means a longer differential service life, safeguarding it from premature wear and tear.\u003c\/p\u003e\n\u003ch4\u003eExclusive Magnetic Drain Plug Safeguards Differential\u003c\/h4\u003e\n\u003cp\u003ePPE further enhances their Rear Diff Cover by adding their exclusive magnetic drain plug. Their magnetic drainplug acts as a crucial safeguard from metallic shards that are common occurrences in differentials. These shards can wreak havoc on the differential internals and lead to an expensive repair bill. That's where the metallic drain plug comes in, it catches these metallic shards before they have a chance to do any damage. PPE's Heavy Duty Cast Aluminum Rear Diff Cover Raw is the ultimate upgrade for your differentials providing cooler oil, stronger materials, and a magnetic drain plug.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 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\u003eBuilt for 2020–2025 GM Silverado\/Sierra 2500HD and 3500HD 6.6L Duramax, confirm fit before purchase.\u003c\/li\u003e\n\u003cli\u003eAdds 1.43 quarts of extra oil capacity for better cooling and thermal stability.\u003c\/li\u003e\n\u003cli\u003eInternal ribs and external fins improve lubrication and heat dissipation.\u003c\/li\u003e\n\u003cli\u003eHelps lower differential fluid temps, extending service life.\u003c\/li\u003e\n\u003cli\u003eStronger than the stock cover, adding extra housing support.\u003c\/li\u003e\n\u003cli\u003eMagnetic drain plug captures metal particles to protect gears and bearings.\u003c\/li\u003e\n\u003cli\u003eIncludes a 1\/8-inch NPT port for an optional temp sensor.\u003c\/li\u003e\n\u003cli\u003eConstructed from heat-treated A356.0-T6 aluminum for long-lasting durability.\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty included for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca title=\"Installation Instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0611\/8539\/2883\/files\/138053000_Install_Guide_v2.pdf?v=1645643534\" target=\"_blank\"\u003e Installation Instructions\u003c\/a\u003e \u003c\/strong\u003e\u003c\/p\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":49527573315868,"sku":"PPE138053000","price":296.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/ppe138053000_01.jpg?v=1722359644"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/collections\/GM_Duramax_Differential_Cover_Thumb_1.jpg?v=1728574450","url":"https:\/\/www.alligatorperformance.com\/collections\/2020-2026-gm-duramax-66l-l5p-differential-covers.oembed","provider":"Alligator Performance","version":"1.0","type":"link"}