Turn pedal effort into hydraulic brake pressure with the new Dorman First Stop Brake Master Cylinder M631053. It is a direct-fit replacement for the 2015-2018 Chevrolet Silverado 2500 and Silverado 3500, the 2015-2019 Chevrolet Silverado 2500 HD and Silverado 3500 HD, the 2015-2019 GMC Sierra 2500 HD and Sierra 3500 HD, and the 2016-2019 Chevrolet Suburban 3500 HD (All engines).
Dorman precision-engineered this master cylinder to match the original unit's design, function and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
- Precise replacement: The cylinder housing is made to match the casting material of the original part for similar performance.
- Durable design: Every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: Made entirely from new materials, with a focus on quality and safety.
- Strict specifications: Made to meet rigorous SAE International standards.
Specifications: The master cylinder material is cast iron. It has a 1.5 in bore diameter, two outlets and two mounting holes. The rearward outlet size and the secondary outlet thread diameter are both M14-1.5. A single reservoir, the master cylinder cap and a sensor are included. Mounting hardware, a mounting bracket, bleeder hoses, a push rod and a brake booster are not included. Country of origin: China.
A soft or sinking brake pedal, fluid leaking at the cylinder, or a lit brake warning light may be signs that a master cylinder needs replacing. Diagnose the cause before replacing the unit.
Interchange: 130.66078
13066078 · 22989338 · MC391534
This part cross-references / interchanges with the following part numbers:
130.66078, 22989338, MC391534
