Cardone 54-74821 Power Brake Booster

Vacuum Power Brake Booster for GM SUVs

The Cardone 54-74821 vacuum power brake booster is a remanufactured replacement built to restore brake assist and pedal response on select Chevrolet, GMC, Buick, Isuzu, Oldsmobile, and Saab applications. It is re-engineered and 100% tested for fit and function, with O.E.-quality seals, check valves, and a rust-prohibitive finish for dependable service.

Compatible With 2002-2006 Chevrolet Trailblazer, 2002-2005 GMC Envoy, and related platform vehicles that use a vacuum power brake booster. This Cardone Vacuum Power Brake Booster, part number 54-74821, is built for direct replacement where the original booster has lost assist or shows signs of wear.

Key Features

• Remanufactured to match original equipment performance
• Dual-diaphragm design for vacuum-assisted braking support
• 100% tested for reliable 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
• Steel construction with gray finish
• Package includes booster and instruction manual

Product Details

The Cardone Vacuum Power Brake Booster line focuses on remanufactured brake boosters that are inspected, re-engineered, and tested to meet original equipment performance targets. For this application, the 54-74821 uses a dual diaphragm style with a 10.915-inch diaphragm diameter and an M10x1.5 master cylinder stud thread size. The booster is supplied without a master cylinder and is intended for vehicles listed in the fitment data, including Chevrolet SSR, Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Isuzu Ascender, Oldsmobile Bravada, and Saab 9-7x.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Brake Assist Problems It Can Address

• Hard brake pedal feel from a weak or leaking booster
• Reduced vacuum assist during normal braking
• Brake pedal effort that increases over time
• Loss of consistent pedal response after booster wear
• Replacement needs after corrosion or internal seal failure

Installation Notes and Tips

• Verify vehicle configuration before ordering; some listed applications require the vehicle to be without a master cylinder or without a vacuum switch port and master cylinder.
• Confirm master cylinder and pushrod alignment before installation.
• Inspect vacuum supply, check valves, and related brake components during replacement.
• Follow the included instruction manual and vehicle service procedures for proper installation.

Quality Assurance

Cardone remanufactured brake boosters are built and tested to match O.E. performance, with design review and upgrades applied where applicable to improve durability. Every unit is 100% tested before release to help ensure proper fit and function.

• Fits 2003-2006 Chevrolet SSR, N/A; fits vehicles lacking master cylinders
• Fits 2004-2005 Buick Rainier, N/A; fits vehicles lacking master cylinders
• Fits 2005 Chevrolet Trailblazer, N/A; without vacuum switch port and master cylinder
• Fits 2005 Chevrolet Trailblazer EXT, N/A; without vacuum switch port and master cylinder
• Fits 2005 GMC Envoy, N/A; without vacuum switch port and master cylinder
• Fits 2005 GMC Envoy XL, N/A; without vacuum switch port and master cylinder
• Fits 2005 GMC Envoy XUV, N/A; without vacuum switch port and master cylinder
• Fits 2003-2005 Isuzu Ascender, N/A; fits vehicles lacking master cylinders
• Fits 2005 Saab 9-7x, N/A; fits vehicles lacking master cylinders
• Fits 2002-2004 Chevrolet Trailblazer, N/A; fits vehicles lacking master cylinders
• Fits 2002-2004 Chevrolet Trailblazer EXT, N/A; fits vehicles lacking master cylinders
• Fits 2002-2004 GMC Envoy, N/A; fits vehicles lacking master cylinders
• Fits 2002-2004 GMC Envoy XL, N/A; fits vehicles lacking master cylinders
• Fits 2004 GMC Envoy XUV, N/A; fits vehicles lacking master cylinders
• Fits 2002-2004 Oldsmobile Bravada, N/A; fits vehicles lacking master cylinders