{"id":949,"date":"2026-10-11T13:49:33","date_gmt":"2026-10-11T13:49:33","guid":{"rendered":"https:\/\/www.jlinlin.com\/?post_type=product&p=949"},"modified":"2026-10-12T02:41:00","modified_gmt":"2026-10-12T02:41:00","slug":"upper-radiator-hose-kit-for-2020-2025-l5p-duramax-6-6l-aluminum-upper-radiator-coolant-hose-replacement-upgrade","status":"publish","type":"product","link":"https:\/\/www.jlinlin.com\/index.php\/product\/upper-radiator-hose-kit-for-2020-2025-l5p-duramax-6-6l-aluminum-upper-radiator-coolant-hose-replacement-upgrade\/","title":{"rendered":"Upper Radiator Hose Kit for 2020-2025 L5P Duramax 6.6L, Aluminum Upper Radiator Coolant Hose Replacement Upgrade"},"content":{"rendered":"

Specifications<\/h2>\n<\/p>\n\n\n\n\n\n\n\n
Brand<\/td>\n<\/td>\n<\/tr>\n
Material<\/td>\n6063 Aluminum Alloy + 5-Ply Silicone Hose<\/td>\n<\/tr>\n
Item Weight<\/td>\n2.38 lbs<\/td>\n<\/tr>\n
OEM Part Number<\/td>\n84813629, 85122989<\/td>\n<\/tr>\n
Compatibility<\/td>\nFor GMC Models:
2020-2025 Sierra 2500 HD\/3500 HD L5P 6.6L Duramax
For Chevrolet Models:
2020-2025 Silverado 2500 HD\/3500 HD L5P 6.6L Duramax<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Description<\/h2>\n

<\/p>\n

upper radiator hose<\/strong>\u00a0<\/span>is a direct-fit aluminum coolant pipe kit for\u00a0<\/span>2020-2025 Chevrolet Silverado 2500 HD\/3500 HD<\/strong>\u00a0<\/span>and\u00a0<\/span>2020-2025 GMC Sierra 2500 HD\/3500 HD<\/strong>\u00a0<\/span>with the\u00a0<\/span>L5P 6.6L Duramax<\/strong>\u00a0<\/span>engine. This\u00a0<\/span>L5P Duramax radiator hose<\/strong>\u00a0<\/span>replaces OEM part numbers\u00a0<\/span>84813629<\/strong>\u00a0<\/span>and\u00a0<\/span>85122989<\/strong>.<\/p>\n

This product is built for buyers searching for a\u00a0<\/span>chevy silverado coolant hose<\/strong>,\u00a0<\/span>chevy radiator hose<\/strong>,\u00a0<\/span>coolant hose chevrolet<\/strong>, or\u00a0<\/span>GMC radiator hose<\/strong>\u00a0<\/span>for compatible Duramax trucks. It is not a universal\u00a0<\/span>car coolant hose<\/strong>\u00a0<\/span>or random-fit\u00a0<\/span>car radiator hose<\/strong>.<\/span><\/p>\n

\"Upper<\/div>\n

What Does This Upper Radiator Hose Replace?<\/span><\/h2>\n

This\u00a0<\/span>upper radiator hose<\/strong>\u00a0upgrades the factory upper radiator hose assembly with a precision-formed aluminum coolant pipe. It follows the OEM coolant routing path for a bolt-on installation without cutting, welding, or modifying factory components. Unlike universal\u00a0<\/span>radiator hoses<\/strong>\u00a0or a generic\u00a0<\/span>car radiator hose<\/strong>, this kit is built for specific Silverado and Sierra L5P Duramax applications.<\/span><\/span><\/p>\n

Compared with universal\u00a0radiator hoses<\/strong>\u00a0or a generic\u00a0car coolant hose<\/strong>, this kit is vehicle-specific. It is designed for the listed L5P Duramax applications and should be checked against OEM numbers\u00a084813629<\/strong>\u00a0and\u00a085122989<\/strong> before purchase.<\/span><\/span><\/p>\n

What Is Included in the Kit?<\/span><\/h3>\n

This\u00a0<\/span>car radiator hose<\/strong>\u00a0<\/span>upgrade includes the core parts needed for the upper cooling system connection:<\/p>\n

\n
    \n
  • \n
    \nred aluminum upper <\/strong>coolant<\/strong> pipe *1<\/strong>\n<\/div>\n<\/li>\n
  • \n
    \nreinforced 5-<\/strong>ply<\/strong> silicone radiator hose couplers *2<\/strong>\n<\/div>\n<\/li>\n
  • \n
    stainless steel T-bolt clamps *4<\/strong><\/div>\n<\/li>\n<\/ul>\n<\/div>\n

    The included\u00a0<\/span>silicone coolant hoses<\/strong>\u00a0<\/span>and T-bolt clamps help secure the aluminum pipe connection. For buyers comparing replacement\u00a0<\/span>radiator hoses<\/strong>, this kit provides a more complete installation package than a single rubber hose.<\/p>\n

    \nSize Details of the kit<\/span>\u00a0<\/span>
    \n<\/h3>\n
    \n
      \n
    • \n
      Aluminum pipe end size: approximately ID 1.84 in \/ 46.8 mm<\/strong>\n<\/div>\n<\/li>\n
    • \n
      Aluminum pipe outer size: approximately OD<\/strong> 2.0 in \/ 50.8 mm<\/strong>\n<\/div>\n<\/li>\n
    • \n
      Silicone coupler size shown: approximately 2.01 in \/ 51 mm<\/strong>\n<\/div>\n<\/li>\n
    • \n
      Silicone coupler length shown: approximately 3.54 in \/ 90 mm<\/strong>\n<\/div>\n<\/li>\n
    • \n
      Clamp range shown: approximately 2.04-2.36 in \/ 52-60 mm<\/strong>\n<\/div>\n<\/li>\n<\/ul>\n<\/div>\n
      \n

      These measurements help you compare the kit with the factory car coolant hose routing before installation.<\/p>\n<\/div>\n

      \"Complete<\/div>\n

      Why Choose This Aluminum Coolant Pipe Kit?<\/span><\/h2>\n

      Choose this\u00a0<\/span>L5P Duramax radiator hose<\/strong>\u00a0if you want to replace the factory upper radiator hose assembly with a complete aluminum coolant pipe kit. It is designed for a cleaner engine bay appearance, secure upper cooling system connection, and direct-fit installation on compatible Silverado and Sierra Duramax trucks.<\/span><\/span><\/p>\n

      1. 6063-T6 Aluminum Construction<\/span><\/h3>\n

      Built with\u00a0<\/span>6063-T6 aluminum construction<\/strong>, this\u00a0<\/span>upper radiator hose<\/strong>\u00a0<\/span>kit uses high-strength aluminum, precision CNC machining, and an anodized finish to create a cleaner and more rigid upper coolant pipe structure than the bulky factory rubber hose appearance.<\/p>\n

      For buyers comparing standard\u00a0<\/span>radiator hoses<\/strong>\u00a0<\/span>with an aluminum coolant pipe setup, this product offers a more performance-inspired engine bay look while keeping the original upper cooling path.<\/p>\n

      \"6063-T6<\/div>\n

      2. Reinforced Silicone Couplers<\/span><\/h3>\n

      This kit uses reinforced\u00a0<\/span>silicone radiator hose<\/strong>\u00a0couplers to complete the upper cooling system connection. The 5-ply\u00a0<\/span>silicone coolant hoses<\/strong>\u00a0are designed to support a secure fit with the included stainless steel T-bolt clamps. This combination helps create a reliable connection for daily driving, towing, hauling, and long-term diesel truck use.<\/span><\/span><\/p>\n

      \"Red<\/div>\n

      3. Built for Real Use<\/h3>\n

      Designed for heavy-duty applications including towing, daily driving, and custom engine bay builds. This upper radiator coolant pipe upgrade provides long-lasting durability, dependable coolant flow, and a stronger cooling system connection for demanding Duramax trucks.<\/p>\n

      \"Before<\/div>\n

      4. Cleaner Engine Bay Upgrade<\/h3>\n

      Replaces the bulky factory rubber coolant hose with a sleek aluminum upper coolant tube setup to create a cleaner and more aggressive under-hood appearance. A popular engine bay upgrade for L5P Duramax performance and diesel truck enthusiasts.<\/p>\n

      \"Direct-fit<\/div>\n

      5. Direct-Fit for Chevrolet Silverado<\/span><\/h3>\n

      This Chevy Silverado<\/strong><\/span>\u00a0coolant hose<\/strong>\u00a0<\/span>fits\u00a0<\/span>2020-2025 Chevy Silverado 2500 HD\/3500 HD L5P 6.6L Duramax<\/strong>. It works as a direct-fit\u00a0<\/span>Chevy radiator hose<\/strong>\u00a0<\/span>and\u00a0<\/span>coolant hose Chevrolet<\/strong>\u00a0<\/span>replacement when the vehicle matches OEM part numbers\u00a0<\/span>84813629<\/strong>\u00a0<\/span>or\u00a0<\/span>85122989<\/strong>.<\/p>\n

      6. Direct-Fit for GMC Sierra<\/span><\/h3>\n

      This kit also fits\u00a0<\/span>2020-2025 GMC Sierra 2500 HD\/3500 HD L5P 6.6L Duramax<\/strong>, making it a compatible\u00a0<\/span>GMC radiator hose<\/strong>\u00a0<\/span>for listed Sierra models. It installs along the original coolant hose routing and is designed for a clean under-hood fit.<\/p>\n

      Where Can This Upper Radiator Hose Kit Be Used?<\/span><\/h2>\n
        \n
      • Factory upper radiator hose replacement<\/span><\/li>\n
      • Chevy Silverado coolant hose replacement<\/li>\n
      • GMC Sierra radiator hose replacement<\/li>\n
      • L5P Duramax radiator hose upgrade<\/li>\n
      • Daily driving cooling system maintenance<\/li>\n
      • Towing and hauling applications<\/li>\n
      • Heavy-duty diesel truck use<\/li>\n
      • Work truck cooling system repair<\/li>\n
      • Long-distance driving and road trip preparation<\/li>\n
      • Custom diesel engine bay builds<\/li>\n
      • Performance-inspired under-hood styling<\/li>\n
      • Long-term upper coolant pipe upgrade<\/li>\n
      • Replacement for aging or worn factory rubber radiator hoses<\/li>\n
      • Cooling system service during radiator, thermostat, or coolant maintenance<\/li>\n<\/ul>\n

        Who Should Confirm Fitment Before Ordering?<\/span><\/h2>\n

        This\u00a0<\/span>upper radiator hose<\/strong>\u00a0<\/span>is not a universal\u00a0<\/span>car coolant hose<\/strong>, lower radiator hose, heater hose, EGR coolant hose, or coolant fluid product. Before ordering this\u00a0<\/span>Chevy radiator hose<\/strong>, Chevy Silverado<\/strong><\/span>\u00a0coolant hose<\/strong>,\u00a0<\/span>coolant hose Chevrolet<\/strong>, or\u00a0<\/span>GMC radiator hose<\/strong>, confirm your vehicle is a\u00a0<\/span>2020-2025 Silverado\/Sierra 2500 HD\/3500 HD with the L5P 6.6L Duramax engine<\/strong>\u00a0<\/span>and matches OEM part number\u00a0<\/span>84813629<\/strong>\u00a0<\/span>or\u00a0<\/span>85122989<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Specifications Brand Material 6063 Aluminum Alloy + 5-P […]<\/p>\n","protected":false},"featured_media":1093,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[67],"product_tag":[68,69,70],"class_list":["post-949","product","type-product","status-publish","has-post-thumbnail","product_cat-upper-coolant-hose-kit","product_tag-cooling-system","product_tag-radiator-hose","product_tag-upper-coolant-hose-kit","first","instock","shipping-taxable","purchasable","product-type-variable","has-default-attributes"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/product\/949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/comments?post=949"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/media\/1093"}],"wp:attachment":[{"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/media?parent=949"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=949"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=949"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.jlinlin.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}