Dorman M630002 brake master cylinder for the 2003-2007 Hummer H2 turns pedal force into hydraulic pressure for the brakes. It is built to follow the design, function and performance of the original master cylinder on these years.
- Sold in Dorman's First Stop line
- Aluminum cylinder housing
- All rubber components are EPDM compound, which resists glycol-based brake fluid
- Made entirely of new materials
- Made to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630002 brake master cylinder
- Fits: 2003-2007 Hummer H2
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, brake fluid wetness on the cylinder or a brake warning light can mean the master cylinder is worn, and these signs can have other causes too. Before replacing anything, look over the cylinder, its line fittings and the firewall behind it for wet brake fluid, with the engine off. A shop can run the pedal and booster tests.
Fits
This is a direct-fit 2003-2007 Hummer H2 master cylinder, and one is needed per vehicle.
Specifications
Fit and size
- Quantity per vehicle: 1
- Master cylinder bore diameter: 37 mm
- Number of outlets: 2
- Rearward outlet size: 1/2-20 in
- Secondary outlet thread diameter: 1/2-20 in
Build and materials
- Master cylinder material: Aluminum
- Rubber components: EPDM compound
- Reservoir: included
- Sensor: included
- Condition: New
- Country of origin: China
In the box
One brake master cylinder with its reservoir and sensor. Mounting hardware is not included, and the old fasteners may not be reusable, so plan on new ones.
Interchange: 100-2631 · 13-3106 · 10-3106 · 130.66042 · 355-47169
18047533 · NM4204 · F140465 · F144044 · MC140465 · MC144044
This part cross-references / interchanges with the following part numbers:
100-2631, 13-3106, 10-3106, 130.66042, 355-47169, 18047533, NM4204, F140465, F144044, MC140465, MC144044
Frequently Asked Questions
Is the Dorman M630002 the right master cylinder for the 2003-2007 Hummer H2?
Yes. Dorman M630002 is a direct-fit replacement for the 2003-2007 Hummer H2, which takes one master cylinder.
Does the Dorman M630002 master cylinder come with a reservoir?
Yes. Dorman M630002 comes with its reservoir and sensor. Mounting hardware is not included.
Is this brake master cylinder made of aluminum?
Yes. The master cylinder material is aluminum, and its rubber components are EPDM compound, which resists glycol-based brake fluid.
Can a sinking brake pedal point to a bad master cylinder?
It can, though other brake parts can cause it too. Fluid on the cylinder or a brake warning light are other signs, so have the brakes checked promptly.
Does Dorman M630002 replace the 355-47169 master cylinder?
Yes. 355-47169 is one of the numbers Dorman M630002 replaces, and it appears on the Interchange line.
