Convert brake-pedal force into the hydraulic pressure that operates the brakes with the Dorman - First Stop Brake Master Cylinder M390279. It drops in as a direct-fit replacement for the 1994-2000 Chevrolet C3500 and GMC C3500, the 1995-2000 Chevrolet K3500 and GMC K3500, and the 1995-1999 Chevrolet P30 and GMC P3500 (engine code: All), engineered to match the design and function of the original unit on these applications.
- Precise replacement: the aluminum cylinder housing is built to match the casting material of the original part for similar performance.
- Durable design: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely of new materials, not remanufactured.
- Strict specifications: made to meet rigorous SAE International standards.
This master cylinder has a 1.25 in bore diameter, two outlets, and a rearward outlet size of 1/2-20, and it ships with a reservoir. Mounting hardware and a sensor are not included, so consult the vehicle service information for the correct fasteners. If a failed master cylinder is the cause of a sinking or spongy pedal, this replaces it. Country of origin: China.
Interchange: 174-721 · 174721 · 18M742 · 783-44031 · 78344031 · 83-44031 · 8344031 · M900964 · 100-2984 · 1002984 · M-86031 · M86031 · 13252 · 13-2535 · 132535 · 10-2535 · 102535 · 130.66031 · 131.66027 · 131.66031 · MC250250 · 355-40049 · 35540049 · 355-47157 · 35547157 · 18021277 · 18029969 · M2535 · NM2535 · MC390279 · F131509 · MC131509. Manufacturer part number M390279.
This part cross-references / interchanges with the following part numbers:
174-721, 18M742, 783-44031, 83-44031, M900964, 100-2984, M-86031, 13252, 13-2535, 10-2535, 130.66031, 131.66027, 131.66031, MC250250, 355-40049, 355-47157, 18021277, 18029969, M2535, NM2535, MC390279, F131509, MC131509
