{"product_id":"sumyola-rear-main-seal-gasket-cover-for-gm-chevy-ls-engines-replacement-cover-bolts-oem-fit","title":"Sumyola Rear Main Seal Gasket Cover for GM Chevy LS Engines - Replacement Cover \u0026 Bolts, OEM Fit","description":"\u003cp\u003e\u003cstrong\u003eSumyola Rear Main Seal Gasket Cover \u0026amp; Bolts replace OEM rear main cover parts for GM Chevy LS engines, restoring a secure seal at the back of the crankcase.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis rear main seal gasket cover kit is engineered to match the fit and function of the original GM components for a long list of Chevrolet, GMC, Cadillac and related models that use LS-series engines. The kit replaces part numbers 635-518, 12633579 and 12639250 and ships with the cover and the hardware needed for installation. Sumyola combines factory production experience and certified quality control to deliver a ready-to-install replacement that helps stop leaks and maintain proper crankcase sealing when performing engine repair or rebuild work.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and part numbers does this cover fit?\u003c\/h3\u003e\n\u003cp\u003eThis Sumyola rear main seal cover is made to replace the listed OEM part numbers and fits a wide range of GM vehicles that use the LS engine family. Compatibility covers many Chevrolet, GMC, Cadillac, Pontiac, Saab and Hummer models across model years noted in the product specs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces part numbers: 635-518, 12633579, 12639250.\u003c\/li\u003e\n  \u003cli\u003eChevrolet: Avalanche, Camaro, Caprice, Colorado, Corvette, Express, Silverado, SSR, Suburban, Tahoe, Trailblazer.\u003c\/li\u003e\n  \u003cli\u003eGMC: Canyon, Envoy, Savana, Sierra, Yukon.\u003c\/li\u003e\n  \u003cli\u003eAlso fits select Cadillac, Buick, Hummer, Pontiac and Saab models using GM LS engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is the quality and what certifications back the part?\u003c\/h3\u003e\n\u003cp\u003eSumyola manufactures this cover in a facility with over 16 years of production experience and follows formal quality systems. The factory holds IATF 16949:2016 certification and each unit undergoes inspection by an independent QC department before shipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIATF 16949:2016 certified production standards.\u003c\/li\u003e\n  \u003cli\u003eIndependent quality control inspections and repeated testing per unit.\u003c\/li\u003e\n  \u003cli\u003eOne-year limited warranty covering manufacturing defects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the kit and what support is available during installation?\u003c\/h3\u003e\n\u003cp\u003eThe package includes the rear main seal gasket cover plus the bolts required for installation, prepared to match the OEM attachment points. Sumyola offers technical support from an engineering team that can help diagnose fitment questions or fault codes encountered after installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete cover plus mounting bolts to replace the factory unit.\u003c\/li\u003e\n  \u003cli\u003eRemote engineering support for installation troubleshooting and fault-code help.\u003c\/li\u003e\n  \u003cli\u003eFast VIN fitment check service—provide your VIN and Sumyola will verify fit within one business day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill I get a refund if the part doesn’t fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eYes. If you can't confirm fitment, supply your vehicle VIN prior to purchase and Sumyola will verify compatibility within one business day. If the part is found non-applicable, the purchase will be refunded promptly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVIN-based compatibility verification available on request.\u003c\/li\u003e\n  \u003cli\u003eNon-applicable parts are eligible for immediate refund.\u003c\/li\u003e\n  \u003cli\u003eOne-year warranty covers manufacturing-related failures only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This rear main seal gasket cover kit is aimed at professional mechanics, automotive technicians, and experienced DIYers who are repairing or rebuilding GM LS engines and need a reliable OEM-equivalent replacement. It is particularly suited for owners of the vehicles listed in the compatibility notes who want a certified, inspected part backed by a warranty and technical support. If you need fitment assurance, provide your VIN for a confirmation before installation.\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: Does this cover fit my Chevy LS engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Provide your VIN and Sumyola will verify fitment within one business day to confirm compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What warranty and support come with the part?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The part includes a one-year warranty plus remote engineering support and QC-tested inspection.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sumyola","offers":[{"title":"Default Title","offer_id":48086777200798,"sku":"B0D5B5L929","price":51.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/sumyola-rear-main-cover-front-view.jpg?v=1785904690","url":"https:\/\/northtrailauto.ca\/products\/sumyola-rear-main-seal-gasket-cover-for-gm-chevy-ls-engines-replacement-cover-bolts-oem-fit","provider":"North Trail Auto","version":"1.0","type":"link"}