{"product_id":"autobaba-engine-rear-main-seal-cover-kit-for-gm-4-8-5-3-6-0-6-2l-aluminum-with-gasket-bolts","title":"AUTOBABA Engine Rear Main Seal Cover Kit for GM 4.8\/5.3\/6.0\/6.2L — Aluminum with Gasket \u0026 Bolts","description":"\u003cp\u003e\u003cstrong\u003eAUTOBABA Engine Rear Main Seal Cover Kit with gasket and bolts replaces GM part numbers 635-518, 12633579, 12639250 for many Cadillac, Chevy, GMC, Buick and other GM-based vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement rear main seal cover is designed to match OEM form and function for a secure, long-lasting seal at the back of the engine. Manufactured from corrosion-resistant aluminum and supplied with a pre-cut gasket and mounting bolts, the kit helps restore proper sealing where the crankshaft exits the block. Before ordering, confirm vehicle fitment against the included part numbers and the compatibility list to ensure an exact match for your model year and engine.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and engines does this rear main seal cover fit?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit covers a broad range of GM models across multiple brands and years, including Cadillac Escalade, GMC Sierra\/Yukon, Chevy Silverado\/Suburban\/Tahoe, and many others using GM small- and big-block V8s. Fitment extends to 4.8L, 5.3L, 6.0L and 6.2L engine families listed in the compatibility notes. Always cross-reference your VIN, engine code, or original part number to confirm compatibility.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eChevy: Avalanche, Camaro, Corvette, Express, Silverado, Suburban, Tahoe and more (years vary).\u003c\/li\u003e\n  \u003cli\u003eGMC: Sierra, Yukon, Savana, Canyon, Envoy and other compatible models.\u003c\/li\u003e\n  \u003cli\u003eOther makes: Buick, Cadillac, Hummer, Isuzu, Pontiac, Saab in specified years.\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM numbers: 635-518, 12633579, 12639250 — verify before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is this cover kit built and what materials are used?\u003c\/h3\u003e\n\n\u003cp\u003eConstructed from high-grade aluminum, the cover is machined to meet OEM-like tolerances for a stable fit and improved corrosion resistance. The package includes a precisely cut gasket and hardware so you have the required components for installation. The aluminum body reduces the risk of rust compared with some stamped-steel aftermarket alternatives, while the gasket provides the sealing surface between cover and block.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHigh-quality aluminum housing for corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003ePre-cut gasket matched to the cover’s sealing flange.\u003c\/li\u003e\n  \u003cli\u003eIncluded mounting bolts to replace worn fasteners.\u003c\/li\u003e\n  \u003cli\u003eEngineered to align with factory bolt patterns and sealing surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation requires typical engine access to the rear crank area and basic mechanical skills; removal of drivetrain components or engine support may be necessary on some vehicles. Clean mating surfaces thoroughly and follow torque specs for bolts to prevent leaks. Routine inspection after installation is recommended to verify the seal is performing as intended and to catch any adjacent oil leaks early.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePrepare by cleaning the block sealing surface and checking for damage.\u003c\/li\u003e\n  \u003cli\u003eUse correct torque values and sequence when tightening bolts.\u003c\/li\u003e\n  \u003cli\u003eMay require transmission\/driveshaft removal on certain models.\u003c\/li\u003e\n  \u003cli\u003eInspect after initial road use to confirm no seepage at the joint.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose this AUTOBABA kit over a single-part replacement?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit approach supplies the cover, gasket and bolts together so you replace all sealing elements at once, reducing the chance of rework from missing or corroded hardware. Buying a full kit simplifies procurement and helps ensure a consistent fit and finish comparable to the engine’s original sealing surfaces. It’s particularly useful when replacing an older, damaged or corroded rear cover.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete kit minimizes parts mismatch and follow-up repairs.\u003c\/li\u003e\n  \u003cli\u003eHardware included to replace brittle or corroded bolts.\u003c\/li\u003e\n  \u003cli\u003eAluminum cover reduces long-term corrosion risk compared to some alternatives.\u003c\/li\u003e\n  \u003cli\u003eManufactured to align with common OEM mounting patterns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This AUTOBABA rear main seal cover kit is intended for professional mechanics, experienced DIYers and fleet technicians working on GM-platform vehicles that use the listed engine sizes and part numbers. If you need a direct replacement for part 635-518 \/ 12633579 \/ 12639250, want a corrosion-resistant aluminum cover, and prefer a complete gasket-and-bolt kit to streamline installation, this product is a suitable choice. Always verify compatibility with your vehicle’s year, model, and engine before ordering.\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 gasket and bolts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The AUTOBABA kit includes the aluminum cover, pre-cut gasket and the mounting bolts needed for installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit my 5.3L Silverado?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Possibly — this kit lists compatibility with many Silverado 1500\/2500 models. Verify your VIN, engine code, or OEM part number (635-518\/12633579\/12639250).\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AUTOBABA","offers":[{"title":"Default Title","offer_id":48083303858334,"sku":"B0CZLBB9GP","price":58.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/autobaba-rear-main-seal-cover-front-view.jpg?v=1785831051","url":"https:\/\/northtrailauto.ca\/products\/autobaba-engine-rear-main-seal-cover-kit-for-gm-4-8-5-3-6-0-6-2l-aluminum-with-gasket-bolts","provider":"North Trail Auto","version":"1.0","type":"link"}