{"product_id":"dorman-m630509-brake-master-cylinder","title":"Dorman M630509 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Chevrolet and GMC Trucks\u003c\/h2\u003e\u003cp\u003eThe Dorman M630509 Brake Master Cylinder is engineered to restore proper brake hydraulics for Chevrolet Sierra, Sierra 1500, and Silverado 1500 models. Designed with precision, this master cylinder includes a reservoir and sensor to ensure optimal brake system performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 0.813 inches for accurate hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum material for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir and sensor for complete brake system integration\u003c\/li\u003e\n\u003cli\u003eTwo outlets with rearward outlet size M12 x 1.0 and secondary outlet thread diameter 10 mm\u003c\/li\u003e\n\u003cli\u003eThread pitch of 1.0 for secure fitting\u003c\/li\u003e\n\u003cli\u003ePackage contains the master cylinder only; mounting hardware not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M630509 brake master cylinder is designed specifically for select Chevrolet and GMC trucks, including the Sierra, Sierra 1500, and Silverado 1500. Its aluminum construction provides strength and resistance to corrosion, which is essential for maintaining brake system integrity over time. The 0.813-inch bore diameter ensures precise hydraulic pressure delivery, while the included reservoir and sensor support proper fluid management and brake system monitoring. Featuring two outlets, including a rearward outlet sized M12 x 1.0 and a secondary outlet with a 10 mm thread diameter, this master cylinder is engineered for compatibility with the original brake hydraulics setup. The thread pitch of 1.0 ensures a secure and leak-free connection during installation.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake pressure loss due to worn or damaged master cylinder\u003c\/li\u003e\n\u003cli\u003eEliminates brake fluid leaks from faulty reservoir or seals\u003c\/li\u003e\n\u003cli\u003eResolves brake warning light issues related to sensor failure\u003c\/li\u003e\n\u003cli\u003eImproves brake pedal feel and responsiveness in Chevrolet Sierra and Silverado trucks\u003c\/li\u003e\n\u003cli\u003eReplaces corroded or cracked aluminum master cylinders in GMC Sierra 1500\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M630509 master cylinder requires careful attention to brake fluid handling and bleeding procedures. Since mounting hardware is not included, reuse existing hardware or acquire compatible fasteners. Ensure all connections, including the rearward and secondary outlets, are tightened to manufacturer specifications to prevent leaks. Properly bleed the brake system after installation to remove air and restore full braking performance. Verify sensor connections to maintain brake system monitoring functions.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M630509 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to long-term reliability. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship under normal use conditions.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792309092533,"sku":"BKKX-M630509","price":122.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M630509_Fro.jpg?v=1774997695","url":"https:\/\/www.partcatalog.com\/products\/dorman-m630509-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}