{"product_id":"national-wheel-seal-370001a-for-isuzu-chevrolet-gmc-trucks-unitized-oil-bath-spring-loaded-lip","title":"National Wheel Seal 370001A for Isuzu, Chevrolet \u0026 GMC Trucks — Unitized Oil-Bath, Spring-Loaded Lip","description":"\u003cp\u003e\u003cstrong\u003eThe National 370001A Wheel Seal is a rugged, unitized oil-bath seal engineered to stop axle leaks and protect wheel bearings on select Isuzu, Chevrolet and GMC trucks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt by a brand with over seven decades in sealing technology, this wheel seal combines a spring-loaded nitrile lip, abrasion protection, and patented Sure-Lock ribs to offer reliable contact sealing over a wide temperature range. Its unitized design improves structural strength and simplifies installation compared with multi-piece seals, while materials and construction are chosen to withstand heavy-duty driving conditions.\u003c\/p\u003e\n\n\u003ch3\u003eWhat vehicles is the 370001A compatible with?\u003c\/h3\u003e\n\u003cp\u003eThis seal fits a range of medium- and heavy-duty Isuzu, Chevrolet and GMC models from the late 1990s through the 2010s. Always confirm fitment with your vehicle details before ordering to ensure correct application.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIsuzu: 2005–2011 FVR, 2004–2011 FXR, 2005–2007 HTR, 2005–2008 HVR\u003c\/li\u003e\n  \u003cli\u003eChevrolet: 1997–2009 T6500\/T7500; 2003–2009 C6500\/C7500 Kodiak\u003c\/li\u003e\n  \u003cli\u003eGMC: 2003–2009 C6500 TopKick\u003c\/li\u003e\n  \u003cli\u003eUse the seller’s fitment tool (enter year, make, model, engine and trim) and read any fitment notes shown.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the construction improve durability and installation?\u003c\/h3\u003e\n\u003cp\u003eThe seal uses a unitized assembly that strengthens the component and protects the primary sealing lip during installation. A spring-loaded main lip maintains steady contact with the shaft while the abrasion-resistant nitrile body resists wear from contaminants and heat.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUnitized body for increased structural integrity and simpler install\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded main lip for constant shaft contact and leak prevention\u003c\/li\u003e\n  \u003cli\u003eAbrasion-protected nitrile to resist scoring and surface wear\u003c\/li\u003e\n  \u003cli\u003ePatented Sure-Lock ribs on ID\/OD to reduce bore leakage and hold position\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat operating conditions can this wheel seal handle?\u003c\/h3\u003e\n\u003cp\u003eThis design tolerates a wide range of temperatures and typical heavy-duty vehicle environments without rapid degradation. Its oil-bath orientation and material choices provide dependable sealing across cold starts and hot-running conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTemperature rating: -40°F to 225°F (-40°C to 107°C)\u003c\/li\u003e\n  \u003cli\u003eDesigned for oil-bath wheel hubs and axle applications\u003c\/li\u003e\n  \u003cli\u003eResists abrasion, shaft interference and contamination ingress\u003c\/li\u003e\n  \u003cli\u003eRecommended where continuous oil contact and point-contact sealing are required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before buying and installing this part?\u003c\/h3\u003e\n\u003cp\u003eVerify the exact vehicle fitment and read any fitment notes provided by the seller or fitment tool. Inspect the hub bore and shaft for damage, and replace worn bearings or mating hardware to ensure a proper seal life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm fit via the online “Confirmed Fit” tool using full vehicle specs\u003c\/li\u003e\n  \u003cli\u003eCheck for fitment notes (look for the blue “i” indicator before purchase)\u003c\/li\u003e\n  \u003cli\u003eClean and inspect mating surfaces; replace damaged hubs or shafts\u003c\/li\u003e\n  \u003cli\u003eFollow proper installation technique to avoid nicking the sealing lip\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The National 370001A is aimed at professional technicians, fleet maintenance crews and DIY mechanics servicing medium- and heavy-duty Isuzu, Chevrolet and GMC trucks that require a durable, oil-bath wheel seal. Choose this part when you need a robust, ready-to-install seal with proven sealing features and broad compatibility—but always confirm vehicle fitment and prepare the hub and shaft correctly for best results.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this seal fit my Chevrolet Kodiak?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This 370001A fits many 2003–2009 Chevrolet C6500 and C7500 Kodiak models; confirm year, model and trim with the fitment tool before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the seal handle extreme cold?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the seal is rated down to -40°F (-40°C), suitable for cold-start conditions in heavy-duty vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":48084755906718,"sku":"B001L5OVN0","price":38.9,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/national-370001a-front-view.jpg?v=1785861855","url":"https:\/\/northtrailauto.ca\/products\/national-wheel-seal-370001a-for-isuzu-chevrolet-gmc-trucks-unitized-oil-bath-spring-loaded-lip","provider":"North Trail Auto","version":"1.0","type":"link"}