Turn pedal effort into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M98952, a new cast iron replacement built around the design of the original unit. It fits many vehicles, among them the 1975-1980 Chevrolet C10, 1975-1980 Chevrolet G10 and 1979-1980 GMC C1500 with all engines. See the Buyer's Guide tab for the full list.
Dorman engineered this master cylinder to match the original's design, function and performance on the listed applications, and built it from new, high-quality materials for a dependable replacement. If you need a master cylinder for a 1975-1980 Chevrolet C10, this one comes with the reservoir included.
- Precise replacement: the cast iron cylinder housing is built to match the casting material of the original part and is intended to deliver similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely from new materials for quality and safety.
- Strict specifications: produced to meet rigorous SAE International standards.
Specifications: 1 in bore diameter, two outlets, 1/2-20 rearward outlet size, reservoir included. Mounting hardware and sensor are not included. Country of origin: China.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, fluid leaking at the master cylinder, or a steadily dropping fluid level in the reservoir. Diagnose the cause before replacing parts, and bleed the brake system after installation as directed by the vehicle service information.
