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Dorman - First Stop Brake Master Cylinder P/N:M630325
$133.99
Convert firm pedal pressure into the hydraulic force that actuates your brakes with the Dorman - First Stop Brake Master Cylinder M630325. It installs as a direct-fit replacement for the 2005-2006 Chevrolet Silverado 1500, 2007 Chevrolet Silverado 1500 Classic, 2005-2006 Chevrolet Silverado 1500 HD, 2005-2006 GMC Sierra 1500, 2007 GMC Sierra 1500 Classic, and 2005-2006 GMC Sierra 1500 HD (All engines). It is precision-engineered to match the design, function, and performance of the original master cylinder for a safe, durable replacement.
- 100% new, not remanufactured: made entirely from new, high-quality materials and built to meet rigorous SAE International standards.
- Aluminum housing: constructed to match the casting material of the original part for similar performance; 1.125 in bore with two outlets and a 1/2-20 secondary/rearward outlet thread.
- Durable seals: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Reservoir and sensor included; mounting hardware not included: consult the vehicle service information for the correct fasteners and whether they may be reused.
Signs the original master cylinder may need replacing include a brake pedal that slowly sinks under steady pressure, a spongy feel, or fluid loss without a visible external leak. If a failed master cylinder is the cause, this unit replaces it. Country of origin: China.
Interchange: 174-1011 · 1741011 · 100-2642 · 1002642 · 13-3193 · 133193 · 10-3082 · 103082 · 10-3193 · 103193 · 130.66053 · 13066053 · 355-47180 · 35547180 · 15183822 · M4109 · NM4109 · MC390930 · F142290 · MC142290
Manufacturer part number M630325
This part cross-references / interchanges with the following part numbers:
174-1011, 100-2642, 13-3193, 10-3082, 10-3193, 130.66053, 355-47180, 15183822, M4109, NM4109, MC390930, F142290, MC142290
Frequently Asked Questions
What vehicles does the M630325 master cylinder fit?
It's a direct-fit replacement for the 2005-2006 Silverado 1500, 2007 Silverado 1500 Classic, 2005-2006 Silverado 1500 HD, 2005-2006 Sierra 1500, 2007 Sierra 1500 Classic, and 2005-2006 Sierra 1500 HD.
Does it come with a reservoir and sensor?
Yes — this master cylinder includes the reservoir and the sensor. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused.
Is this a new or remanufactured unit?
It's 100% new, made entirely from new materials rather than remanufactured, and built to meet SAE International standards.
What is the bore size and outlet configuration?
The master cylinder has a 1.125 in bore, two outlets, and a 1/2-20 secondary/rearward outlet thread.
How do I know the master cylinder is failing?
Signs may include a brake pedal that slowly sinks under steady pressure, a spongy feel, or fluid loss without a visible external leak. Diagnose the cause before replacing.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M630325
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