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Dorman - First Stop Brake Master Cylinder P/N:M630505
$169.99
Feed firm, consistent hydraulic pressure to your truck's brake lines with the Dorman - First Stop Brake Master Cylinder M630505. It drops in as a direct-fit replacement for the 2009-2013 Chevrolet Silverado 2500 HD, 2009-2014 Chevrolet Silverado 3500 HD, 2009-2013 GMC Sierra 2500 HD, and 2009-2014 GMC Sierra 3500 HD (All engines). The master cylinder converts brake-pedal force into the hydraulic pressure that operates the braking system; if a leaking or internally bypassing original is the cause of a sinking or spongy pedal, this replaces it. It's precision-engineered to match the design, function, and performance of the original unit on the listed applications.
- Aluminum housing: constructed to match the casting material of the original part for similar performance.
- 100% new: built entirely from new, high-quality materials — not remanufactured.
- Glycol-resistant seals: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Built to spec: made to meet rigorous SAE International standards; features a 1.5 in bore and three outlets.
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. Country of origin: China.
Interchange: 174-1188 · 1741188 · 100-3892 · 1003892 · 10-4117 · 104117 · 130.66069 · 13066069 · 355-47195 · 35547195 · 15935842 · 15935843 · NM4214 · MC391183 · F144394 · MC144394. Manufacturer part number M630505.
This part cross-references / interchanges with the following part numbers:
174-1188, 100-3892, 10-4117, 130.66069, 355-47195, 15935842, 15935843, NM4214, MC391183, F144394, MC144394
Frequently Asked Questions
Which vehicles does the M630505 master cylinder fit?
It's a direct-fit replacement for the 2009-2013 Chevrolet Silverado 2500 HD, 2009-2014 Silverado 3500 HD, 2009-2013 GMC Sierra 2500 HD, and 2009-2014 GMC Sierra 3500 HD (All engines). Check the Buyer's Guide tab to confirm.
Does it include a reservoir and sensor?
Yes. Both the reservoir and the sensor are included with this master cylinder.
Is mounting hardware included?
No. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused.
What is this master cylinder made of?
It has an aluminum housing constructed to match the casting material of the original part, with EPDM rubber components that resist glycol-based brake fluid. It's 100% new, not remanufactured.
What are signs my master cylinder may need replacing?
A brake pedal that slowly sinks to the floor, a soft or spongy pedal, or brake fluid leaking at the unit can be signs. Diagnose the cause first, since other components can produce the same symptoms.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M630505
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