Convert every press of the pedal into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M630325, a new aluminum unit built to replicate the original master cylinder's design, function and performance. It fits many vehicles, among them the 2005-2006 Chevrolet Silverado 1500, 2005-2006 GMC Sierra 1500 and 2007 Chevrolet Silverado 1500 Classic. See the Buyer's Guide tab for the full list.
The master cylinder converts force from the brake pedal into hydraulic pressure and sends it through the brake lines to the wheels. The reservoir and sensor come included with this Dorman unit.
- Precise replacement: the cylinder housing is constructed to match the casting material of the original part and is intended to deliver similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- All-new construction: made entirely of new, high-quality materials.
- Strict specifications: built to meet rigorous SAE International standards.
Specifications: aluminum master cylinder, 1.125 in bore diameter, two outlets, 1/2-20 rearward outlet and 1/2-20 secondary outlet threads. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether the originals may be reused. Country of origin: China.
Signs the master cylinder may need replacing include a soft or sinking brake pedal and brake fluid leaking at the cylinder or reservoir. Have the brake system diagnosed before replacing parts, and bleed the system after installation per the service procedure.
Interchange: 174-1011 · 100-2642 · 13-3193 · 10-3082 · 10-3193 · 130.66053 · 355-47180
1741011 · 1002642 · 133193 · 103082 · 103193 · 13066053 · 35547180 · 15183822 · M4109 · NM4109 · MC390930 · F142290 · MC142290
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
