Dorman M630034 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, GMC, and Oldsmobile

The Dorman M630034 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Chevrolet, GMC, and Oldsmobile vehicles. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Master cylinder bore diameter: 1 inch for accurate fluid displacement
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for brake fluid storage
• Equipped with sensor for brake system monitoring
• Two outlets with secondary outlet thread diameter of 0.5 inches
• Rearward outlet size: 1/2-20 thread
• Package contains the master cylinder only; mounting hardware not included

Technical Details and Compatibility

This Dorman brake master cylinder (part number M630034) is specifically designed for compatibility with Chevrolet Blazer, GMC Jimmy, GMC Sonoma, Oldsmobile Bravada, and Chevrolet S10 models. The 1-inch bore diameter and aluminum construction provide reliable hydraulic pressure and resistance to wear. The included reservoir and sensor support proper brake fluid management and system diagnostics. With two outlets and precise thread sizes, this master cylinder integrates seamlessly into the brake hydraulic system of the listed vehicles.

Common Applications and Problem Resolution

• Restores brake fluid pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces master cylinders with internal leaks or worn seals
• Addresses brake warning light activation due to sensor issues
• Solves brake fluid reservoir leaks or damage
• Improves overall brake system responsiveness and safety

Installation Notes and Tips

Installation of the Dorman M630034 master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. Mounting hardware is not included, so reuse existing hardware or acquire appropriate fasteners. Verify compatibility with your Chevrolet Blazer, GMC Jimmy, GMC Sonoma, Oldsmobile Bravada, or Chevrolet S10 before installation. Sensor connections should be securely attached to maintain brake system monitoring.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications, using corrosion-resistant aluminum for durability. The included sensor and reservoir are designed for reliable operation within the brake hydraulic system. While mounting hardware is not included, the product undergoes quality checks to ensure fit and function. Warranty details are provided by Dorman and should be reviewed at the time of purchase.