{"product_id":"dorman-m39440-brake-master-cylinder","title":"Dorman M39440 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for GM Vehicles\u003c\/h2\u003e\u003cp\u003eThe Dorman M39440 Brake Master Cylinder is engineered to restore proper brake hydraulics for select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models. Designed with precision, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIncludes reservoir and sensor for complete brake system integration\u003c\/li\u003e\n\u003cli\u003eDual bore diameters of 0.938 and 1.25 inches for balanced hydraulic performance\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum for corrosion resistance and longevity\u003c\/li\u003e\n\u003cli\u003eEquipped with five outlets, including rearward outlet sizes M10 x 1.0, M13 x 1.5, and M16 x 1.5\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple GM models such as Buick Century, Cadillac DeVille, Chevrolet Celebrity, Oldsmobile Cutlass Ciera, and Pontiac 6000\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M39440 master cylinder features a dual bore design with diameters of 0.938 and 1.25 inches, optimizing hydraulic pressure distribution for improved brake response. Its aluminum construction offers enhanced durability and resistance to corrosion, critical for maintaining brake system integrity over time. The included reservoir and sensor facilitate seamless integration with the vehicle’s brake fluid monitoring system. With five outlets, including rearward outlet thread sizes M10 x 1.0, M13 x 1.5, and M16 x 1.5, this master cylinder supports complex brake line configurations found in various GM vehicles.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis brake master cylinder is compatible with a range of General Motors vehicles, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBuick Century\u003c\/li\u003e\n\u003cli\u003eCadillac DeVille and Fleetwood\u003c\/li\u003e\n\u003cli\u003eChevrolet Celebrity\u003c\/li\u003e\n\u003cli\u003eOldsmobile Cutlass Ciera\u003c\/li\u003e\n\u003cli\u003ePontiac 6000\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to meet the specific hydraulic requirements of these models, ensuring proper fit and function.\u003c\/p\u003e\u003ch2\u003eCommon Brake System Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal sinking or sponginess due to master cylinder wear\u003c\/li\u003e\n\u003cli\u003eBrake fluid leaks from a failing master cylinder reservoir or seals\u003c\/li\u003e\n\u003cli\u003eInconsistent brake pressure causing uneven braking performance\u003c\/li\u003e\n\u003cli\u003eBrake warning light activation related to sensor failure\u003c\/li\u003e\n\u003cli\u003eCorrosion or damage to the original aluminum master cylinder body\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the brake system is fully depressurized before removal\u003c\/li\u003e\n\u003cli\u003eBleed the brake system thoroughly after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify outlet thread sizes match vehicle brake line fittings (M10 x 1.0, M13 x 1.5, M16 x 1.5)\u003c\/li\u003e\n\u003cli\u003eCheck sensor connections for proper electrical integration\u003c\/li\u003e\n\u003cli\u003eUse recommended brake fluid type as specified by the vehicle manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M39440 master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and included sensor contribute to reliable brake system performance. While specific warranty details vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in product durability.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43789337133237,"sku":"BKKX-M39440","price":113.33,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39440_Fro.jpg?v=1774997471","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39440-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}