{"product_id":"dorman-m630027-brake-master-cylinder","title":"Dorman M630027 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Chevrolet and GMC Vans\u003c\/h2\u003e\u003cp\u003eThe Dorman M630027 brake master cylinder is engineered to restore proper brake hydraulics in Chevrolet Express 2500, Express 3500, GMC Savana 2500, and Savana 3500 models. Designed with durable aluminum construction and a built-in reservoir, this master cylinder ensures consistent brake fluid delivery for safe and effective braking performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1.25 inches for precise hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eConstructed from lightweight, corrosion-resistant aluminum\u003c\/li\u003e\n\u003cli\u003eIncludes an integrated reservoir for brake fluid storage\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with rearward outlet size 1\/2-20 and secondary outlet thread diameter 9\/16-18\u003c\/li\u003e\n\u003cli\u003eCompatible with Chevrolet Express 2500\/3500 and GMC Savana 2500\/3500\u003c\/li\u003e\n\u003cli\u003ePart number M630027 for accurate replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder (part number M630027) is designed specifically for brake hydraulics systems in full-size Chevrolet and GMC vans. The 1.25-inch bore diameter provides the correct hydraulic pressure needed for these heavy-duty vehicles. Made from aluminum, the master cylinder offers resistance to corrosion and heat, contributing to longer service life. The included reservoir simplifies installation and maintenance by housing the brake fluid directly on the unit. With two outlets, including a rearward outlet sized 1\/2-20 and a secondary outlet thread diameter of 9\/16-18, this master cylinder matches the original equipment specifications for the Express and Savana series.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake pressure loss due to worn or leaking master cylinder\u003c\/li\u003e\n\u003cli\u003eEliminates spongy or unresponsive brake pedal feel\u003c\/li\u003e\n\u003cli\u003eReplaces master cylinders with damaged or corroded reservoirs\u003c\/li\u003e\n\u003cli\u003eAddresses brake fluid leaks from faulty seals or ports\u003c\/li\u003e\n\u003cli\u003eEnsures proper brake fluid distribution in dual outlet brake systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M630027 brake master cylinder requires basic mechanical skills and proper brake system knowledge. Since mounting hardware is not included, retain original fasteners or source compatible hardware. Bleed the brake system thoroughly after installation to remove air and ensure optimal brake performance. Verify outlet thread sizes (1\/2-20 rearward and 9\/16-18 secondary) match your vehicle’s brake lines before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated reservoir are designed for durability and reliable operation under demanding conditions. While mounting hardware is not included, the product is backed by Dorman’s limited warranty against defects in materials and workmanship, providing confidence in your replacement part.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792211542197,"sku":"BKKX-M630027","price":108.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M630027_Fro.jpg?v=1774997601","url":"https:\/\/www.partcatalog.com\/products\/dorman-m630027-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}