Brake Master Cylinder for 2003-2006 Chevrolet Tahoe & More - Dorman M630284

Turn pedal effort into hydraulic pressure for your brakes with the Dorman First Stop Brake Master Cylinder M630284, a new aluminum unit precision-engineered to match the design, function and performance of the original master cylinder. It fits many vehicles, among them the 2003-2006 Chevrolet Tahoe, 2003-2006 GMC Yukon and 2005-2006 Chevrolet Avalanche 1500. See the Buyer's Guide tab for the full list.

It is a direct-fit replacement for the listed applications. Dorman builds it from new, high-quality materials for a safe, durable replacement.

• Precise replacement: the cylinder housing is built to match the original part's material for similar performance.
• Durable design: all rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
• 100% new: made entirely from new materials for high quality and safety.
• Strict specifications: made to meet rigorous SAE International standards.

This master cylinder has an aluminum body, a 34 mm bore and two outlets. The rearward and secondary outlets both use 1/2-20 threads. A reservoir and a sensor are included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.

Signs a master cylinder may need replacing include a soft or spongy pedal, a pedal that sinks under steady pressure, or brake fluid leaking at the cylinder. Other brake parts can cause similar symptoms, so have the brake system diagnosed first. If the master cylinder is the cause, M630284 replaces it.

Interchange: 174-798 · 100-2638 · 13-3100B · 10-3100 · 130.66049 · 131.66049 · 355-47176
174798 · 1002638 · 133100B · 103100 · 13066049 · 13166049 · 35547176 · 13914 · MC512610 · 15269947 · 18047540 · 19209199 · M4074 · NM4074A · MC390804 · F140377 · MC140377