{"product_id":"dorman-m390259-brake-master-cylinder","title":"Dorman M390259 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Select GM and Dodge Models\u003c\/h2\u003e\u003cp\u003eThe Dorman M390259 Brake Master Cylinder is engineered to restore proper brake hydraulics in your vehicle. Designed for compatibility with various Cadillac, Chevrolet, Dodge, and GMC trucks and SUVs, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable aluminum for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid storage\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with precise thread sizes (1\/2-20 rearward, 9\/16-18 secondary)\u003c\/li\u003e\n\u003cli\u003eMaster cylinder bore diameter of 40 mm \u0026amp; 1-1\/8 inch for accurate fluid displacement\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple models including Chevrolet Blazer, C1500, Escalade, Dodge Ram 1500, and GMC Yukon\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M390259 master cylinder features a robust aluminum body that resists wear and corrosion, extending the service life of your brake system. It comes complete with an integrated reservoir, eliminating the need for separate fluid storage components. The unit has two outlets designed to fit specific brake line connections, with a rearward outlet size of 1\/2-20 and a secondary outlet thread diameter of 9\/16-18. The bore diameter measures 40 mm \u0026amp; 1-1\/8 inch, ensuring proper hydraulic pressure for effective braking performance. This part is compatible with a range of vehicles including Cadillac Escalade, Chevrolet Tahoe, GMC Yukon, and Dodge Ram 1500 models, making it a versatile replacement option.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake fluid pressure in vehicles experiencing soft or spongy brake pedal feel\u003c\/li\u003e\n\u003cli\u003eReplaces master cylinders with internal leaks or worn seals\u003c\/li\u003e\n\u003cli\u003eAddresses brake fluid reservoir damage or contamination issues\u003c\/li\u003e\n\u003cli\u003eSolves inconsistent braking caused by faulty hydraulic components\u003c\/li\u003e\n\u003cli\u003eImproves brake system reliability in older Chevrolet, GMC, Cadillac, and Dodge trucks and SUVs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M390259 master cylinder requires basic brake system knowledge and tools. Since mounting hardware is not included, retain original fasteners or source compatible replacements. Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic function. Verify thread sizes on brake lines match the 1\/2-20 rearward and 9\/16-18 secondary outlets before installation. Always follow vehicle-specific service manual instructions for safety and accuracy.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures this brake master cylinder to meet or exceed OEM specifications, using quality aluminum materials and precise machining. While mounting hardware is not included, the product is designed for direct replacement fitment on compatible Cadillac, Chevrolet, Dodge, and GMC models. Please consult Dorman’s warranty policy for coverage details on the M390259 part number.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792139485365,"sku":"BKKX-M390259","price":62.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M390259_Fro_83465e0e-13cf-490f-94f9-10a15c16e6d7.jpg?v=1774997563","url":"https:\/\/www.partcatalog.com\/products\/dorman-m390259-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}