Dorman M39413 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, GMC, and Jeep Vehicles

The Dorman M39413 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Chevrolet, GMC, and Jeep models. Designed with durable aluminum construction and a dual bore design, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Compatible with Chevrolet Blazer, C10, C1500, C2500, and Suburban models
• Fits GMC K5 Blazer, K10, K1500, K2500, and Suburban variants
• Also fits Jeep Cherokee, Grand Wagoneer, and Wagoneer models
• Aluminum master cylinder material for corrosion resistance and durability
• Includes reservoir for brake fluid storage
• Dual bore diameters: 1.125 inch and 1.578 inch for precise hydraulic control
• Two outlet ports with rearward outlet size 1/2-20 and secondary outlet thread diameter 9/16-18
• Part number M39413 for accurate replacement

Product Features and Specifications

The Dorman M39413 master cylinder features a dual bore design with bore diameters of 1.125 inches and 1.578 inches, allowing it to provide balanced hydraulic pressure to the front and rear brakes. Constructed from aluminum, this master cylinder offers enhanced resistance to corrosion and wear compared to traditional cast iron units. The included reservoir simplifies installation by providing an integrated brake fluid container. This unit has two outlets: a rearward outlet sized at 1/2-20 and a secondary outlet with a 9/16-18 thread diameter, ensuring compatibility with the brake lines on compatible Chevrolet, GMC, and Jeep models.

Common Applications and Problem Resolution

• Restores brake fluid pressure in Chevrolet C10 and C1500 Suburban brake systems
• Replaces worn or leaking master cylinders in GMC K20 and K1500 models
• Addresses brake pedal sinking or sponginess in Jeep Grand Wagoneer and Cherokee vehicles
• Fixes brake fluid leaks caused by damaged or corroded master cylinders
• Improves overall brake system responsiveness and safety

Installation Notes and Tips

Installation of the Dorman M39413 master cylinder requires basic mechanical knowledge and proper brake system bleeding procedures. Note that mounting hardware is not included and must be reused from the original unit or sourced separately. Ensure all brake lines are properly connected to the correct outlet ports based on thread size and orientation. After installation, thoroughly bleed the brake system to remove air and verify proper brake pedal feel before driving.

Quality Assurance and Warranty Information

Dorman manufactures the M39413 master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction provides long-lasting durability under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components. Consult product documentation or the manufacturer for exact warranty terms.