Turn pedal effort into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M630440, a new unit precision-engineered to match the design, function and performance of the original master cylinder. It fits many vehicles, among them the 2006-2008 Chevrolet Trailblazer, 2006-2008 GMC Envoy and 2006 Chevrolet Trailblazer EXT, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list.
Built from new, high-quality materials, this master cylinder is designed to be a safe, durable replacement.
- Precise replacement: the aluminum cylinder housing is made to match the casting material of the original part for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely of new materials for quality and safety.
- Strict specifications: made to meet rigorous SAE International standards.
Specifications: 1.063 in bore diameter; two outlets, with 1/2-20 rearward and secondary outlet threads; reservoir and sensor included; mounting hardware not included. Country of origin: China.
A replacement master cylinder is normally bled as part of installation. Follow the vehicle service information for the bleeding procedure and for the correct fasteners.
Interchange: 100-2644 · 13-3273 · 10-3273 · 130.66055 · 355-47181
1002644 · 133273 · 103273 · 13066055 · 35547181 · 15142479 · M4105 · MC390983 · F142289 · MC142289
This part cross-references / interchanges with the following part numbers:
100-2644, 13-3273, 10-3273, 130.66055, 355-47181, 15142479, M4105, MC390983, F142289, MC142289
