{"product_id":"dorman-m39077-brake-master-cylinder","title":"Dorman M39077 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Chevrolet and GMC Vans\u003c\/h2\u003e\u003cp\u003eThe Dorman M39077 brake master cylinder is engineered to restore proper brake hydraulics in Chevrolet and GMC vans, including G10, G20, P10, and P1500 models. Designed with a cast iron body and a 1.125-inch bore diameter, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1.125 inches for precise hydraulic control\u003c\/li\u003e\n\u003cli\u003eDurable cast iron construction for long-lasting service\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid storage\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with rearward outlet size of 9\/16-18 and secondary outlet thread diameter of 0.5 inches\u003c\/li\u003e\n\u003cli\u003eCompatible with Chevrolet G10, G20, P10, and GMC P1500 models\u003c\/li\u003e\n\u003cli\u003ePart number M39077 for accurate replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder features a cast iron material that provides strength and resistance to wear under demanding braking conditions. The 1.125-inch bore diameter is designed to match the hydraulic requirements of the specified Chevrolet and GMC vans, ensuring proper brake fluid displacement. The included reservoir allows for adequate brake fluid storage, while the two outlet ports facilitate fluid distribution to the brake lines. The rearward outlet size measures 9\/16-18, and the secondary outlet thread diameter is 0.5 inches, matching OEM specifications for a direct fit replacement. Note that mounting hardware is not included with this part.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis brake master cylinder is compatible with the following vehicles:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChevrolet G10\u003c\/li\u003e\n\u003cli\u003eChevrolet G20\u003c\/li\u003e\n\u003cli\u003eChevrolet P10\u003c\/li\u003e\n\u003cli\u003eGMC P1500\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to replace worn or failing master cylinders in these models, restoring proper brake system function.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Master Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpongy or unresponsive brake pedal\u003c\/li\u003e\n\u003cli\u003eBrake fluid leaks from the master cylinder or reservoir\u003c\/li\u003e\n\u003cli\u003eReduced braking efficiency or uneven brake pressure\u003c\/li\u003e\n\u003cli\u003eBrake warning light activation due to hydraulic failure\u003c\/li\u003e\n\u003cli\u003eContaminated or deteriorated internal seals causing brake failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman M39077 brake master cylinder, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Verify that the reservoir is filled with the correct brake fluid type recommended for your vehicle. Since mounting hardware is not included, retain or source the necessary bolts and fittings from your original assembly or a trusted supplier. Proper torque specifications should be followed to avoid leaks or damage.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and precise bore diameter contribute to reliable brake system performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components to ensure customer confidence and product durability.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52089071075509,"sku":"BKKX-M39077","price":74.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39077_Fro.jpg?v=1775148223","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39077-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}