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Dorman - First Stop Brake Master Cylinder P/N:M630595
$159.99
Convert brake-pedal force into the hydraulic pressure that feeds both brake circuits with the Dorman - First Stop Brake Master Cylinder M630595. This 100% new unit installs as a direct-fit replacement for the 2009-2017 Chevrolet Express 2500, 3500 and 4500, 2015-2017 Chevrolet Express Cargo and Pasajeros, 2009-2013 Chevrolet Silverado 2500 HD, 2009-2014 Silverado 3500 HD, 2009-2017 GMC Savana 2500 and 3500, 2009-2016 Savana 4500, 2009-2013 GMC Sierra 2500 HD, and 2009-2014 Sierra 3500 HD (all engines) — see the Buyer's Guide tab for the full list.
- Aluminum housing: constructed to match the casting material of the original part for similar performance.
- EPDM rubber components: made of a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: built entirely of new materials — not remanufactured — and made to meet rigorous SAE International standards.
- Specs: two outlets, a 1.5 in bore, and M12 x 1.0 outlet threads (1 mm primary thread pitch).
Precision-engineered to match the design, function, and performance of the original master cylinder on the listed applications. Includes the reservoir and sensor; mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. If a worn or leaking master cylinder is the cause of a low or sinking pedal, this replaces it. Country of origin: China.
Interchange: 19420963 · 100-2901 · 1002901 · 13-4019 · 134019 · 10-4019 · 104019 · 130.66068 · 355-47194 · 35547194 · 15936936 · NM4215 · MC391168 · F144392 · MC144392. Manufacturer part number M630595.
This part cross-references / interchanges with the following part numbers:
19420963, 100-2901, 13-4019, 10-4019, 130.66068, 355-47194, 15936936, NM4215, MC391168, F144392, MC144392
Frequently Asked Questions
What does this master cylinder do?
It converts brake-pedal force into hydraulic pressure, sending brake fluid from the reservoir through its two outlets to the vehicle's brake circuits.
Does it come with a reservoir and sensor?
Yes. The reservoir and sensor are included. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused.
Is this unit new or remanufactured?
It is 100% new, built entirely of new materials rather than remanufactured, and made to meet SAE International standards.
What are the key specifications?
It has an aluminum housing, a 1.5 in bore, two outlets, and M12 x 1.0 outlet threads with a 1 mm primary outlet thread pitch.
Which vehicles does it fit?
It fits applications such as the 2009-2017 Chevrolet Express 2500/3500/4500 and GMC Savana 2500/3500, plus select Silverado and Sierra 2500/3500 HD models. See the Buyer's Guide tab for the full list.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M630595
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