Cardone 54-74831 Power Brake Booster

Vacuum Power Brake Booster for GM and Saab Applications

The Cardone 54-74831 remanufactured vacuum power brake booster is built for vehicles that need a direct replacement brake assist unit with OE-style fit and function. It is engineered and tested to match original performance for 2006-2008 Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, Saab 9-7x, Buick Rainier, Trailblazer EXT, and Envoy XL applications that do not include a master cylinder.

Key Features

• Remanufactured to match original equipment performance
• Dual-diaphragm design for brake assist support
• 10.3 in. diaphragm diameter
• Steel construction with gray finish
• 100% tested for fit and function
• O.E.-quality seals and check valves installed on every unit
• Rust-prohibitive finish helps extend service life
• Master cylinder output rods are pre-adjusted when included
• Master cylinder not included

Detailed Description

Cardone Vacuum Power Brake Booster 54-74831 is a remanufactured brake booster assembly designed for consistent pedal assist and dependable braking response. The dual diaphragm layout, 261.62 mm diaphragm diameter, and steel housing support OE-style operation, while the remanufacturing process includes design review and testing to help deliver a precise fit. This part cross-references Isuzu 8152670050 and Saab 15267005 for the same application. It is a direct replacement choice for 2006-2008 Chevrolet Trailblazer, 2006-2008 GMC Envoy, 2006-2008 Isuzu Ascender, 2006-2008 Saab 9-7x, 2006-2007 Buick Rainier, 2006 Chevrolet Trailblazer EXT, and 2006 GMC Envoy XL.

Common Problems This Part Can Address

• Hard brake pedal feel from a worn booster diaphragm
• Reduced brake assist during normal stopping
• Vacuum-related brake booster leakage
• Inconsistent pedal response caused by internal wear
• Fitment issues when replacing a failed original booster

Installation Notes and Tips

Verify that the vehicle is equipped without a master cylinder before ordering. Confirm the master cylinder stud thread size is M10x1.5 and compare the original booster configuration before installation. The package includes the booster and instruction manual only. Follow factory service procedures for vacuum line connection, pedal linkage alignment, and final brake system checks after installation.

Quality Assurance

Cardone remanufactures this vacuum power brake booster to OE performance standards and tests every unit for fit and function. The unit also receives O.E.-quality seals and check valves, along with a rust-prohibitive finish, to support reliable service life.