MPA Electrical NM2029 Brake Master Cylinder

Brake Master Cylinder for GM Front Disc Brake Vans

Restore consistent brake pedal feel with this new brake master cylinder from MPA Electrical. Part number NM2029 is a standard replacement unit built for GM chassis applications with front disc brakes, including Chevrolet Express 3500, Chevrolet G30, GMC G3500, GMC Savana 3500, Chevrolet P30, GMC P3500, Chevrolet P20, and GMC P2500 models.

MPA Electrical NM2029 is engineered with a 1.575-inch bore, an aluminum body, and an included reservoir and cap for a direct hydraulic service replacement. It uses DOT 3 brake fluid and is built as a new unit for vehicles that need dependable master cylinder performance after wear, leakage, or internal bypass.

Key Features

• Part number NM2029 brake master cylinder
• Standard replacement grade for brake hydraulic service
• Aluminum master cylinder construction
• 1.575-inch bore diameter
• Reservoir and master cylinder cap included
• Uses DOT 3 brake fluid
• 2 mounting holes with 0.425-inch mounting hole diameter
• New condition for front disc brake applications

Product Details

This MPA Electrical brake master cylinder is built for GM van and chassis-cab applications that use front disc brakes. It is a direct hydraulic replacement for worn or leaking units on Chevrolet Express 3500, Chevrolet G30, GMC G3500, GMC Savana 3500, Chevrolet P30, GMC P3500, Chevrolet P20, and GMC P2500 models. The aluminum housing helps keep the assembly lightweight, while the included reservoir and cap simplify brake system service.

MPA Electrical uses OE sample data and testing protocols to verify dimensional and functional consistency against original specifications. This part cross-references 18013441 for the same application.

Vehicle Fitment

• Fits 1996 Chevrolet Express 3500, N/A, New with front disc brakes
• Fits 1985-1996 Chevrolet G30, N/A, New with front disc brakes
• Fits 1985-1996 GMC G3500, N/A, New with front disc brakes
• Fits 1996 GMC Savana 3500, N/A, New with front disc brakes
• Fits 1985-1994 Chevrolet P30, N/A, New with front disc brakes
• Fits 1985-1994 GMC P3500, N/A, New with front disc brakes
• Fits 1985-1989 Chevrolet P20, N/A, New with front disc brakes
• Fits 1985-1989 GMC P2500, N/A, New with front disc brakes

Common Issues This Part Addresses

• Low or sinking brake pedal caused by internal master cylinder bypass
• Brake fluid leakage at the master cylinder body or reservoir area
• Uneven hydraulic pressure affecting front disc brake performance
• Soft pedal response after master cylinder wear or contamination
• Brake system service needs on GM Express, Savana, G30, P30, P20, G3500, P3500, and P2500 applications

Installation Notes and Quality Assurance

Before installation, confirm bore size, mounting hole spacing, and brake line connection points match the original unit. Bench bleeding is recommended before the master cylinder is installed on the vehicle to help remove trapped air from the hydraulic circuit. Use only DOT 3 brake fluid and inspect the rest of the brake system for contamination or leaks during service.

MPA Electrical manufactures this master cylinder as a new standard replacement part and tests units against OE specifications using controlled inspection processes. That approach supports consistent brake pedal response and proper hydraulic operation after installation.