Dorman M630530 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet and GMC Trucks

The Dorman M630530 Brake Master Cylinder is engineered to restore proper brake function in select Chevrolet and GMC heavy-duty vehicles. Designed with precision, this master cylinder ensures consistent hydraulic pressure for safe and effective braking performance.

• Master cylinder bore diameter of 37 mm for optimal hydraulic control
• Durable aluminum construction for corrosion resistance and longevity
• Includes reservoir and sensor for complete brake system integration
• Two outlet ports with rearward outlet size M14 x 1.5 and 14 mm secondary outlet thread diameter
• Compatible with Chevrolet Express 2500/3500, GMC Savana 2500/3500, Suburban 2500, and Yukon XL 2500 models

Product Details and Specifications

The Dorman M630530 brake master cylinder features a 37 mm bore diameter, providing precise hydraulic pressure control essential for heavy-duty braking systems. Constructed from aluminum, this master cylinder offers enhanced durability and resistance to corrosion, extending the service life of your vehicle's brake hydraulics. It comes complete with an integrated reservoir and sensor, ensuring seamless compatibility with the vehicle’s brake fluid monitoring system. The unit includes two outlets, with a rearward outlet thread size of M14 x 1.5 and a secondary outlet thread diameter of 14 mm, designed to match factory specifications for a direct replacement.

Compatible Vehicles and Applications

• Chevrolet Express 2500 and Express 3500
• GMC Savana 2500 and Savana 3500
• Chevrolet Suburban 2500
• GMC Yukon XL 2500

This master cylinder is specifically designed for these models, ensuring proper fitment and reliable brake system performance.

Common Brake System Issues Addressed

• Spongy or unresponsive brake pedal
• Brake fluid leaks from the master cylinder
• Brake warning light activation due to sensor failure
• Reduced hydraulic pressure affecting braking efficiency
• Contaminated or damaged reservoir affecting fluid levels

Installation Notes and Tips

When installing the Dorman M630530 master cylinder, ensure the brake system is properly bled to remove air pockets and maintain hydraulic integrity. Verify that the sensor connections are secure to avoid brake warning light issues. This part does not include mounting hardware, so retain original fasteners or source appropriate replacements. Follow manufacturer torque specifications for outlet fittings to prevent leaks.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards, using high-quality aluminum materials and precise machining. The included sensor and reservoir are tested for compatibility and durability. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components to ensure customer confidence and product reliability.