Dorman M630031 Brake Master Cylinder — Compatible with Cadillac, Chevrolet and GMC

Overview

The Dorman M630031 brake master cylinder is a precision replacement designed to mirror the original component found in selected Cadillac, Chevrolet, and GMC vehicles from the late 1990s to early 2000s. Crafted with new materials for a safe, durable swap, this part aims to restore dependable braking performance in everyday driving. With a factory-style fit, it supports a straightforward upgrade that respects your vehicle’s braking geometry and pedal feel during routine stops or family trips.

Designed to pair with the vehicle’s hydraulic system, this cylinder emphasizes reliability and consistency. If you’re working on a project like replacing worn components in full-size GM trucks or SUVs, this part is tested to align with the look and function of the original master cylinder and to fit within the space and mounting points you expect from your ride.

Compatibility and fitment

This unit is listed for models including Cadillac Escalade EXT and Escalade (2002), Chevrolet Silverado 1500 (1999–2002), Tahoe (2000–2002), Suburban 1500 (2000–2002), Silverado 1500 HD (2001–2002), and select GMC Sierra and Yukon variants. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. If there is an “i” in a blue circle, additional verification notes may apply — hover over the icon to view details.

Key benefits at a glance

• Precise replacement that mirrors the original housing and function
• Durable design with EPDM rubber components resistant to glycol-based brake fluid
• 100% new materials for quality and safety, not remanufactured
• Meets SAE International standards for reliable performance
• Garage tool fit verification helps ensure you select the right part

What you get

• 100% new brake master cylinder components
• EPDM rubber seals and diaphragms
• Compatibility with listed Cadillac, Chevrolet, and GMC models
• Design to support straightforward installation and factory-like alignment

Real-world use and performance expectations

In everyday driving, a properly installed replacement can contribute to a more predictable brake pedal feel and steady hydraulic response. The outcome depends on overall system condition and correct installation. This part is designed to integrate with your vehicle’s original dimensions and mounting points for a smooth, factory-inspired restoration of braking performance.

Why choose Dorman

Dorman delivers parts designed to meet or exceed original specifications across a wide range of vehicles. The M630031 uses fresh materials and adheres to strict benchmarks, offering a non-remanufactured option that aligns with the vehicle’s engineering intent and supports safe, long-lasting replacements.