{"title":"LLY Duramax Oil Coolers","description":"\u003cp\u003eDirect-fit oil coolers for the LLY Duramax diesel. Every part here is matched to the LLY Duramax platform — confirm your model year before ordering to be sure of fitment. Orders ship fast, free over $70.\u003c\/p\u003e","products":[{"product_id":"lly-duramax-oil-cooler-kit-2001-2005-oem-89040217","title":"LLY Duramax Oil Cooler Kit 2001-2005 OEM 89040217","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an engine oil cooler \/ oil-cooler service kit for the Chevrolet, GMC LLY Duramax diesel (2001-2005). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LLY Duramax repair or service. Every order ships fast and is backed by our support team.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler is a heat exchanger that sheds heat from the engine oil into the coolant. On the 6.0L Power Stroke it is a known weak point: its narrow passages plug with casting sand and coolant scale, oil temperature climbs, the gap between oil (EOT) and coolant (ECT) temperature grows, and the EGR cooler downstream soon fails too. A new oil cooler — or a full cooler kit with gaskets and O-rings — restores proper oil cooling and protects everything downstream, making it one of the most valuable services you can do on these trucks.\u003c\/p\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003ethe oil cooler and\/or its gaskets and O-rings as specified\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eFits Chevrolet, GMC trucks equipped with the LLY Duramax diesel engine, 2001-2005. Please confirm your engine and year before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms \u0026amp; When to Use\u003c\/h4\u003e\u003cp\u003eConsider this LLY Duramax part when you experience:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ehigh oil temperature or oil and coolant intermixing\u003c\/li\u003e\n\u003cli\u003ean EOT-ECT delta fault (6.0 Power Stroke)\u003c\/li\u003e\n\u003cli\u003ea clogged or leaking oil cooler\u003c\/li\u003e\n\u003cli\u003ean oil cooler service or replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 89040217\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e LLY Duramax\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear Range:\u003c\/strong\u003e 2001-2005\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eQuality \u0026amp; Service\u003c\/h4\u003e\u003cp\u003eFast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LLY Duramax diesel parts.\u003c\/p\u003e","brand":"CoreDieselParts.com","offers":[{"title":"Default Title","offer_id":48895869386977,"sku":"CDP-OC-lly-duramax-01","price":351.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/lly-duramax-oil-cooler-kit-2001-2005-1.jpg?v=1786366488"},{"product_id":"lly-duramax-oil-cooler-kit-2001-2007-fleece","title":"LLY Duramax Oil Cooler Kit 2001-2007 - Fleece","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an engine oil cooler \/ oil-cooler service kit for the Chevrolet, GMC LLY Duramax diesel (2001-2007). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LLY Duramax repair or service. Every order ships fast and is backed by our support team.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler is a heat exchanger that sheds heat from the engine oil into the coolant. On the 6.0L Power Stroke it is a known weak point: its narrow passages plug with casting sand and coolant scale, oil temperature climbs, the gap between oil (EOT) and coolant (ECT) temperature grows, and the EGR cooler downstream soon fails too. A new oil cooler — or a full cooler kit with gaskets and O-rings — restores proper oil cooling and protects everything downstream, making it one of the most valuable services you can do on these trucks.\u003c\/p\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003ethe oil cooler and\/or its gaskets and O-rings as specified\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eFits Chevrolet, GMC trucks equipped with the LLY Duramax diesel engine, 2001-2007. Please confirm your engine and year before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms \u0026amp; When to Use\u003c\/h4\u003e\u003cp\u003eConsider this LLY Duramax part when you experience:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ehigh oil temperature or oil and coolant intermixing\u003c\/li\u003e\n\u003cli\u003ean EOT-ECT delta fault (6.0 Power Stroke)\u003c\/li\u003e\n\u003cli\u003ea clogged or leaking oil cooler\u003c\/li\u003e\n\u003cli\u003ean oil cooler service or replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e LLY Duramax\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear Range:\u003c\/strong\u003e 2001-2007\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eQuality \u0026amp; Service\u003c\/h4\u003e\u003cp\u003eFast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LLY Duramax diesel parts.\u003c\/p\u003e","brand":"Fleece","offers":[{"title":"Default Title","offer_id":48895869419745,"sku":"CDP-OC-lly-duramax-02","price":155.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/lly-duramax-oil-cooler-kit-2001-2007-1.jpg?v=1786366493"},{"product_id":"lly-duramax-oil-cooler-kit-2003-2005","title":"LLY Duramax Oil Cooler Kit 2003-2005","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an engine oil cooler \/ oil-cooler service kit for the Chevrolet, GMC LLY Duramax diesel (2003-2005). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LLY Duramax repair or service. Every order ships fast and is backed by our support team.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler is a heat exchanger that sheds heat from the engine oil into the coolant. On the 6.0L Power Stroke it is a known weak point: its narrow passages plug with casting sand and coolant scale, oil temperature climbs, the gap between oil (EOT) and coolant (ECT) temperature grows, and the EGR cooler downstream soon fails too. A new oil cooler — or a full cooler kit with gaskets and O-rings — restores proper oil cooling and protects everything downstream, making it one of the most valuable services you can do on these trucks.\u003c\/p\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003ethe oil cooler and\/or its gaskets and O-rings as specified\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eFits Chevrolet, GMC trucks equipped with the LLY Duramax diesel engine, 2003-2005. Please confirm your engine and year before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms \u0026amp; When to Use\u003c\/h4\u003e\u003cp\u003eConsider this LLY Duramax part when you experience:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ehigh oil temperature or oil and coolant intermixing\u003c\/li\u003e\n\u003cli\u003ean EOT-ECT delta fault (6.0 Power Stroke)\u003c\/li\u003e\n\u003cli\u003ea clogged or leaking oil cooler\u003c\/li\u003e\n\u003cli\u003ean oil cooler service or replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e LLY Duramax\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear Range:\u003c\/strong\u003e 2003-2005\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eQuality \u0026amp; Service\u003c\/h4\u003e\u003cp\u003eFast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LLY Duramax diesel parts.\u003c\/p\u003e","brand":"CoreDieselParts.com","offers":[{"title":"Default Title","offer_id":48910154563809,"sku":"CDP-OC-lly-duramax-03","price":716.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/lly-duramax-oil-cooler-kit-2003-2005-1.jpg?v=1786577636"},{"product_id":"lly-duramax-oil-cooler-kit-2004-2010","title":"LLY Duramax Oil Cooler Kit 2004-2010","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an engine oil cooler \/ oil-cooler service kit for the Chevrolet, GMC LLY Duramax diesel (2004-2010). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LLY Duramax repair or service. Every order ships fast and is backed by our support team.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler is a heat exchanger that sheds heat from the engine oil into the coolant. On the 6.0L Power Stroke it is a known weak point: its narrow passages plug with casting sand and coolant scale, oil temperature climbs, the gap between oil (EOT) and coolant (ECT) temperature grows, and the EGR cooler downstream soon fails too. A new oil cooler — or a full cooler kit with gaskets and O-rings — restores proper oil cooling and protects everything downstream, making it one of the most valuable services you can do on these trucks.\u003c\/p\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003ethe oil cooler and\/or its gaskets and O-rings as specified\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eFits Chevrolet, GMC trucks equipped with the LLY Duramax diesel engine, 2004-2010. Please confirm your engine and year before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms \u0026amp; When to Use\u003c\/h4\u003e\u003cp\u003eConsider this LLY Duramax part when you experience:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ehigh oil temperature or oil and coolant intermixing\u003c\/li\u003e\n\u003cli\u003ean EOT-ECT delta fault (6.0 Power Stroke)\u003c\/li\u003e\n\u003cli\u003ea clogged or leaking oil cooler\u003c\/li\u003e\n\u003cli\u003ean oil cooler service or replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e LLY Duramax\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear Range:\u003c\/strong\u003e 2004-2010\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eQuality \u0026amp; Service\u003c\/h4\u003e\u003cp\u003eFast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LLY Duramax diesel parts.\u003c\/p\u003e","brand":"CoreDieselParts.com","offers":[{"title":"Default Title","offer_id":48913438802145,"sku":"CDP-OC-lly-duramax-05","price":140.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/lly-duramax-oil-cooler-kit-2004-2010-1.jpg?v=1786639164"},{"product_id":"lly-duramax-oil-cooler-kit-2001-2005","title":"LLY Duramax Oil Cooler Kit 2001-2005","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an engine oil cooler \/ oil-cooler service kit for the Chevrolet, GMC LLY Duramax diesel (2001-2005). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LLY Duramax repair or service. Every order ships fast and is backed by our support team.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler is a heat exchanger that sheds heat from the engine oil into the coolant. On the 6.0L Power Stroke it is a known weak point: its narrow passages plug with casting sand and coolant scale, oil temperature climbs, the gap between oil (EOT) and coolant (ECT) temperature grows, and the EGR cooler downstream soon fails too. A new oil cooler — or a full cooler kit with gaskets and O-rings — restores proper oil cooling and protects everything downstream, making it one of the most valuable services you can do on these trucks.\u003c\/p\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\u003cli\u003ethe oil cooler and\/or its gaskets and O-rings as specified\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eFits Chevrolet, GMC trucks equipped with the LLY Duramax diesel engine, 2001-2005. Please confirm your engine and year before ordering to ensure correct fitment.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms \u0026amp; When to Use\u003c\/h4\u003e\u003cp\u003eConsider this LLY Duramax part when you experience:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ehigh oil temperature or oil and coolant intermixing\u003c\/li\u003e\n\u003cli\u003ean EOT-ECT delta fault (6.0 Power Stroke)\u003c\/li\u003e\n\u003cli\u003ea clogged or leaking oil cooler\u003c\/li\u003e\n\u003cli\u003ean oil cooler service or replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e LLY Duramax\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear Range:\u003c\/strong\u003e 2001-2005\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eQuality \u0026amp; Service\u003c\/h4\u003e\u003cp\u003eFast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LLY Duramax diesel parts.\u003c\/p\u003e","brand":"CoreDieselParts.com","offers":[{"title":"Default Title","offer_id":48923483078881,"sku":"CDP-OC-lly-duramax-06","price":143.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/lly-duramax-oil-cooler-kit-2001-2005-1_a6abc4ab-a879-4a24-8649-1f9bc6df4175.jpg?v=1786762349"},{"product_id":"lly-duramax-oil-cooler-2005","title":"LLY Duramax Oil Cooler 2005 - New Direct-Fit Diesel Replacement","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an direct-fit oil cooler for the LLY Duramax diesel (2005). It is a quality new, direct-fit replacement built to OEM-equivalent specification for a professional-grade repair that restores proper function and reliability to your truck.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler sheds heat from the engine oil into the coolant. When it plugs, oil temperature climbs and downstream parts fail. A fresh unit restores proper oil cooling.\u003c\/p\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eConfirm your engine and model year before ordering. Not sure it fits? Email sales@coredieselparts.com with your VIN or engine and year and we will confirm the correct unit.\u003c\/p\u003e\u003ch4\u003eOrdering \u0026amp; Shipping\u003c\/h4\u003e\u003cp\u003eThis part is made to order and typically ships within 2–5 business days. Orders ship fast with tracking. Questions about fitment or your order? Email sales@coredieselparts.com and we are happy to help.\u003c\/p\u003e","brand":"CoreDieselParts.com","offers":[{"title":"Default Title","offer_id":49029379457249,"sku":"CDP-OILC-970313","price":295.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/s-l1600_ae12ea37-3d1f-43ab-b417-5450e72c3cbd.jpg?v=1788469530"},{"product_id":"lly-duramax-oil-cooler-2004-2016","title":"LLY Duramax Oil Cooler 2004-2016 - New Direct-Fit Diesel Replacement","description":"\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis is an direct-fit oil cooler for the LLY Duramax diesel (2004-2016). It is a quality new, direct-fit replacement built to OEM-equivalent specification for a professional-grade repair that restores proper function and reliability to your truck.\u003c\/p\u003e\u003ch4\u003eWhat It Does \u0026amp; How It Helps\u003c\/h4\u003e\u003cp\u003eThe oil cooler sheds heat from the engine oil into the coolant. When it plugs, oil temperature climbs and downstream parts fail. A fresh unit restores proper oil cooling.\u003c\/p\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cp\u003eConfirm your engine and model year before ordering. Not sure it fits? Email sales@coredieselparts.com with your VIN or engine and year and we will confirm the correct unit.\u003c\/p\u003e\u003ch4\u003eOrdering \u0026amp; Shipping\u003c\/h4\u003e\u003cp\u003eThis part is made to order and typically ships within 2–5 business days. Orders ship fast with tracking. Questions about fitment or your order? Email sales@coredieselparts.com and we are happy to help.\u003c\/p\u003e","brand":"CoreDieselParts.com","offers":[{"title":"Default Title","offer_id":49029396463841,"sku":"CDP-OILC-987130","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/6593\/4817\/files\/lly-duramax-oil-cooler-2004-2016-new-direct-fit-diesel-repla-1.jpg?v=1788533763"}],"url":"https:\/\/www.coredieselparts.com\/collections\/lly-duramax-oil-coolers.oembed","provider":"CoreDieselParts.com","version":"1.0","type":"link"}