{"product_id":"dorman-m390257-brake-master-cylinder","title":"Dorman M390257 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Chevrolet, Dodge, and GMC Vehicles\u003c\/h2\u003e\u003cp\u003eThe Dorman M390257 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Chevrolet, Dodge, and GMC trucks and SUVs. Designed with an aluminum body and a 1.25-inch bore diameter, this master cylinder includes a reservoir and supports dual outlet connections for efficient brake fluid distribution.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1.25 inches for precise hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eDurable aluminum construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid storage\u003c\/li\u003e\n\u003cli\u003eTwo outlets with rearward outlet size 1\/2-20 and secondary outlet thread diameter 9\/16-18\u003c\/li\u003e\n\u003cli\u003eCompatible with Chevrolet Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, K1500, K1500 Suburban, K2500, K2500 Suburban, GMC Yukon, Tahoe, and Dodge Ram 1500 and 2500 models\u003c\/li\u003e\n\u003cli\u003eMounting hardware not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M390257 brake master cylinder is constructed from aluminum, providing a lightweight yet durable component that resists corrosion and wear. Its 1.25-inch bore diameter ensures consistent hydraulic pressure for reliable braking performance. The included reservoir allows for proper brake fluid containment and circulation. This master cylinder features two outlets: a rearward outlet sized at 1\/2-20 and a secondary outlet with a 9\/16-18 thread diameter, accommodating the brake line connections required for the specified vehicle models. 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 a range of Chevrolet, Dodge, and GMC trucks and SUVs, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChevrolet Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, K1500, K1500 Suburban, K2500, K2500 Suburban\u003c\/li\u003e\n\u003cli\u003eGMC Yukon and Tahoe\u003c\/li\u003e\n\u003cli\u003eDodge Ram 1500 and Ram 2500\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to replace the original master cylinder in these models, ensuring proper brake system function and safety.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Master Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal sinking or sponginess due to internal leaks\u003c\/li\u003e\n\u003cli\u003eBrake fluid leaks around the master cylinder area\u003c\/li\u003e\n\u003cli\u003eReduced braking efficiency or inconsistent brake pressure\u003c\/li\u003e\n\u003cli\u003eBrake warning light activation related to master cylinder failure\u003c\/li\u003e\n\u003cli\u003eContaminated or damaged reservoir affecting brake fluid supply\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the brake system is properly bled after installation to remove air pockets\u003c\/li\u003e\n\u003cli\u003eVerify compatibility with your specific vehicle model and year before installation\u003c\/li\u003e\n\u003cli\u003eUse appropriate brake fluid as specified by the vehicle manufacturer\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse existing hardware or source separately\u003c\/li\u003e\n\u003cli\u003eInspect brake lines and fittings for wear or damage during installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The M390257 brake master cylinder undergoes rigorous quality control to ensure durability and reliable performance. Please refer to Dorman's warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792138928309,"sku":"BKKX-M390257","price":81.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M390257_Fro.jpg?v=1774997562","url":"https:\/\/www.partcatalog.com\/products\/dorman-m390257-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}