Dorman - First Stop Brake Master Cylinder P/N:M98952

Convert brake-pedal force into the hydraulic pressure that operates the wheel brakes with the Dorman - First Stop Brake Master Cylinder M98952. It installs as a direct-fit replacement for a range of 1974-1980 Chevrolet and GMC trucks, vans, and Suburbans — including the 1975-1980 Chevrolet C10, 1975-1980 Chevrolet G10, 1974-1975 Chevrolet C10 Suburban, 1975-1978 GMC C15, and 1979-1980 GMC G1500 (engine: All). See the Buyer's Guide tab for the full 14-application list.

Dorman builds it to match the design, function, and performance of the original master cylinder on the listed applications, using new, high-quality materials.

• Cast-iron housing: constructed to match the casting material of the original part for similar performance.
• EPDM rubber components: made from a high-quality EPDM compound for resistance to glycol-based brake fluid.
• 100% new: made entirely of new materials, not remanufactured.
• Built to spec: made to meet rigorous SAE International standards.

This unit has two outlets, a 1-inch bore, and a 1/2-20 rearward outlet size. The reservoir is included; no sensor and no mounting hardware are supplied — consult the vehicle service information for the correct fasteners and whether they may be reused. If a leaking or internally bypassing master cylinder is behind a sinking or spongy pedal, this replaces it. Country of origin: China.

Interchange: Manufacturer part number M98952.