Help turn pedal effort into hydraulic brake pressure with this Dorman brake master cylinder, Dorman - First Stop part number M630792. It is a direct-fit replacement for many Chevrolet, GMC and Isuzu truck models, among them the 1999-2007 Chevrolet W5500 Tiltmaster, 2004-2007 Chevrolet W5500HD Tiltmaster and 1999-2007 GMC W5500 Forward. It is precision-engineered to match the original master cylinder's design, function and performance.
The master cylinder is where the braking system starts. When the pedal is pressed, it pushes brake fluid through the lines to the wheel brakes. The M630792 is made of new, high-quality materials and is intended as a safe, durable replacement.
- Precise replacement: The cylinder housing is built to match the casting material of the original part and is designed to deliver similar performance.
- Durable design: Every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: It is made entirely of new materials for quality and safety.
- Strict specifications: It is built to meet rigorous SAE International standards.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, fluid leaking around the cylinder, or a brake fluid level that keeps dropping. These symptoms can have other causes, so diagnose the brake system before replacing parts. After installation, bleed the brakes as directed by the vehicle service information. See the Buyer's Guide tab for the full list of applications.
Interchange: 100-2941 · 13-3940 · 11-3940 · 11-3943 · 11-3970 · 130.76012 · 355-47206
1002941 · 133940 · 113940 · 113943 · 113970 · 13076012 · 35547206 · 97186688 · 97254771 · 8971866880 · 8971866910 · 8972077030 · 8972243790 · 8972547710 · NM9000 · NM9002 · F140751 · MC140751
This part cross-references / interchanges with the following part numbers:
100-2941, 13-3940, 11-3940, 11-3943, 11-3970, 130.76012, 355-47206, 97186688, 97254771, 8971866880, 8971866910, 8972077030, 8972243790, 8972547710, NM9000, NM9002, F140751, MC140751
