Turn pedal effort into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M630028, a 100% new unit engineered to match the original master cylinder's design, function and performance. It is listed for several models, among them the 1992-2002 Chevrolet C3500HD, 1992-2002 GMC C3500HD and 1993-1999 Chevrolet P30. See the Buyer's Guide tab for the full list.
- Precise replacement: the aluminum cylinder housing is built to match the original part's material for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely of new materials for quality and safety.
- Strict specifications: made to meet rigorous SAE International standards.
Specifications: 40 mm bore diameter, two outlets, and a 1/2-20 secondary outlet thread. The reservoir is included. Mounting hardware and a sensor are not included. Country of origin: China.
The master cylinder converts force from the brake pedal into hydraulic pressure that travels through the brake lines. A soft or sinking pedal, fluid seeping from the unit, or a reservoir level that keeps dropping are signs it may need replacing. Other brake components can cause similar symptoms, so diagnose the cause before you replace the master cylinder.
Interchange: 174-689 · 174-719 · 100-2612 · M-86027 · 13-2608 · 13-2754 · 10-2608 · 10-2754 · 130.66027 · 355-47157
18M949 · 13023 · MC252680 · 18017378 · 18021279 · 18029970 · 18060157 · M2608 · M2754 · NM2754 · MC390278 · F140672 · MC140672 · 174689 · 174719 · 1002612 · M86027 · 132608 · 132754 · 102608 · 102754 · 13066027 · 35547157
This part cross-references / interchanges with the following part numbers:
174-689, 174-719, 18M949, 100-2612, M-86027, 13023, 13-2608, 13-2754, 10-2608, 10-2754, 130.66027, MC252680, 355-47157, 18017378, 18021279, 18029970, 18060157, M2608, M2754, NM2754, MC390278, F140672, MC140672
