{"product_id":"a-premium-engine-rear-main-seal-cover-kit-for-gm-ohv-v8-4-8-7-0l-complete-gasket-seal-replacement","title":"A-Premium Engine Rear Main Seal Cover Kit for GM OHV V8 4.8–7.0L — Complete Gasket \u0026 Seal Replacement","description":"\u003cp\u003e\u003cstrong\u003eA-Premium Engine Rear Main Seal Cover Kit is a complete replacement cover assembly engineered to reseal the rear of OHV V8 engines (4.8L–7.0L) used across many Chevrolet, GMC, Cadillac, Hummer, Pontiac, Saab, Buick and Isuzu models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit replaces the rear main seal cover and related seals and gaskets to stop engine rear-seal leaks and restore proper oil containment at the back of the crankshaft on overhead valve GM V8 engines. Built to match factory dimensions and indexed mounting points, the cover is supplied with a one-year unlimited-mileage guarantee and comes with part references for cross-checking compatibility. Below you’ll find concise answers to common fitment, installation, and performance questions, plus specific vehicle and dimension details to confirm this part fits your vehicle.\u003c\/p\u003e\n\n\u003ch3\u003eWill this rear main seal cover fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eCheck the model years and engine family carefully: this A-Premium kit is designed for GM OHV V8 engines in 4.8L, 5.3L, 5.7L, 6.0L, 6.2L and 7.0L displacements and fits a wide list of Chevrolet and GMC trucks, SUVs, vans and high-performance cars. The product references and OEM cross numbers are provided so you can verify against your vehicle’s original part number before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible Chevrolet models include Avalanche, Camaro, Corvette, Silverado, Suburban, Tahoe, Impala and more (various years listed).\u003c\/li\u003e\n  \u003cli\u003eGMC fitment covers Sierra, Canyon, Savana, Yukon and Envoy families across multiple model years.\u003c\/li\u003e\n  \u003cli\u003eAlso fits Cadillac Escalade\/CTS, Hummer H2\/H3, Pontiac models, Saab 9-7X, Buick Rainier\/LaCrosse and Isuzu NPR variants.\u003c\/li\u003e\n  \u003cli\u003eCross-reference numbers: 635-518, 12633579, 12639250, 12615666, 12598301 and others for verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key dimensions and part references I should confirm?\u003c\/h3\u003e\n\u003cp\u003eThe kit lists clear physical dimensions and common reference numbers so you can confirm fitment without removing the old cover. Use these specs to match your engine’s rear cover dimensions and cross-reference the OEM numbers against your vehicle’s service manual or parts registry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInside diameter: 2.7 inches — critical for seal seating around the crankshaft.\u003c\/li\u003e\n  \u003cli\u003eCover length: 10 inches and width: 6 inches — compare to the original cover outline.\u003c\/li\u003e\n  \u003cli\u003eReference part numbers included to cross-check: SK635518, 8-12633-579-0, 8-12639-250-0, and similar OEM codes.\u003c\/li\u003e\n  \u003cli\u003eIncludes gaskets and sealing components sized to the listed dimensions for a straightforward replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the kit help during a rear main seal replacement?\u003c\/h3\u003e\n\u003cp\u003eThe A-Premium kit supplies a direct-fit replacement cover and the necessary seals to restore a leak-free rear crankshaft interface, simplifying installation and reducing the need to source multiple parts. Quality-matched sealing surfaces and accurate mounting points make it suitable for professional shops and experienced DIYers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete cover assembly reduces parts hunting — seal and cover designed to mate precisely.\u003c\/li\u003e\n  \u003cli\u003eSaves time by including compatible gaskets and seal components sized for listed engines.\u003c\/li\u003e\n  \u003cli\u003eManufactured to OEM-style dimensions to prevent misalignment and premature wear.\u003c\/li\u003e\n  \u003cli\u003eBacked by a one-year unlimited-mileage guarantee for added confidence.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this kit for? If you own or maintain GM vehicles with OHV V8 engines in the 4.8L through 7.0L range and you need a reliable replacement for a leaking or damaged rear main seal cover, this A-Premium kit is built to be a direct-fit option. It’s suitable for fleet technicians, independent mechanics, and confident DIYers who will verify cross-reference numbers and vehicle years before installation. Always confirm compatibility with the listed reference numbers and dimensions, and follow proper engine removal and installation procedures for rear main seal replacement.\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 kit include the rear main seal and gaskets?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit supplies the rear main seal cover plus the necessary gaskets and seal components sized for the listed engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What engine sizes and vehicles does it fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Fits OHV V8 engines 4.8L–7.0L across many Chevrolet, GMC, Cadillac, Hummer, Pontiac, Saab, Buick and Isuzu models; verify with provided part numbers.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"A-Premium","offers":[{"title":"Default Title","offer_id":48082957369502,"sku":"B082X9HMHG","price":60.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/a-premium-rear-main-seal-cover-front-view.jpg?v=1785820378","url":"https:\/\/northtrailauto.ca\/products\/a-premium-engine-rear-main-seal-cover-kit-for-gm-ohv-v8-4-8-7-0l-complete-gasket-seal-replacement","provider":"North Trail Auto","version":"1.0","type":"link"}