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Dorman - First Stop Brake Master Cylinder P/N:M630452
$108.99
Turn firm brake-pedal pressure into the hydraulic force that operates the entire brake system with the Dorman First Stop Brake Master Cylinder M630452. It drops in as a direct-fit replacement for the 2007 Chevrolet Silverado 1500 [All] and 2007 GMC Sierra 1500 [All], and is precision-engineered to match the design, function, and performance of the original master cylinder on those applications.
- 100% new: built entirely from new materials — not remanufactured.
- Aluminum housing: constructed to match the casting material of the original part for similar performance.
- Durable seals: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Ready to install: reservoir and sensor are included; made to meet SAE International standards.
Specs: 1.125 in bore, 2 outlets, with M12 x 1.0 outlet thread size and a 1 mm primary outlet thread pitch. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Signs the original may need replacing include a pedal that slowly sinks under steady pressure, a spongy pedal, or fluid loss at the master cylinder; diagnose the cause before replacing. Country of origin: China.
Interchange: 100-2649 · 1002649 · 13-3320 · 133320 · 10-3320 · 103320 · 130.66060 · 355-47186 · 35547186 · 15183823 · NM4188 · MC391080 · F142291 · MC142291. Manufacturer part number M630452.
This part cross-references / interchanges with the following part numbers:
100-2649, 13-3320, 10-3320, 130.66060, 355-47186, 15183823, NM4188, MC391080, F142291, MC142291
Frequently Asked Questions
What vehicles does this master cylinder fit?
It's a direct-fit replacement for the 2007 Chevrolet Silverado 1500 [All] and 2007 GMC Sierra 1500 [All]. Check the Buyer's Guide tab to confirm your vehicle.
Does it come with the reservoir and a sensor?
Yes — the reservoir and sensor are included. Mounting hardware is not included; consult the service information for the correct fasteners and whether they may be reused.
What are the bore and outlet specs?
It has a 1.125 in bore and 2 outlets, with M12 x 1.0 outlet thread size and a 1 mm primary outlet thread pitch.
Is this part new or remanufactured?
It's 100% new, built entirely from new materials rather than remanufactured, and made to meet SAE International standards.
What are signs the master cylinder may need replacing?
A pedal that slowly sinks under steady pressure, a spongy pedal, or fluid loss at the master cylinder. Diagnose the cause before replacing, as other parts can cause these symptoms.
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Dorman - First Stop Brake Master Cylinder P/N:M630452
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