Cardone 52-7421 Power Brake Booster

Hydro-Boost Brake Booster for HD Trucks

Cardone 52-7421 is a remanufactured hydro-boost power brake booster built for direct replacement in select Chevrolet Silverado HD and GMC Sierra HD applications. It is re-engineered and tested to match O.E. performance, with fit and function verified before it leaves the factory.

The Cardone Hydro-Boost Power Brake Booster line focuses on restoring consistent hydraulic brake assist with remanufactured components that follow original design intent while incorporating durability improvements where applicable. For buyers searching for a 2015-2020 Chevrolet Silverado 2500 HD brake booster or a 2015-2020 GMC Sierra 3500 HD hydro-boost replacement, this part number provides a targeted OE-style solution.

Key Features

• Remanufactured to match O.E. performance
• 100% tested for reliable fit and function
• 100% O.E. quality seals and check valves installed
• Rust-prohibitive finish helps extend service life
• Guaranteed fit and function
• Master cylinder output rods are pre-adjusted when included
• Cast iron construction with black finish
• Package contents: hydraulic booster, O-ring kit, instruction sheet

Product Details

Cardone 52-7421 is a remanufactured power brake booster for hydro-boost systems. It uses cast iron construction and includes O.E.-quality seals and check valves to support consistent brake assist performance. The unit is finished with a rust-prohibitive coating and is tested for fit and function to help restore proper pedal response in heavy-duty brake systems. This part cross-references Chevrolet and GMC OE numbers, including 22872386 and 84031701, for the same application.

What It Helps Fix

• Hard brake pedal feel caused by a worn hydro-boost unit
• Reduced brake assist in hydraulic brake booster systems
• Brake response issues related to internal seal or check valve wear
• Fitment problems from a damaged or incorrect replacement booster
• Corrosion-related booster deterioration on high-mileage trucks

Installation Notes

• Compatible with vehicles lacking master cylinders.
• Verify master cylinder stud thread size before installation: M12 x 1.75 / M10 x 1.5.
• Confirm the hydraulic connections and mounting points match the original unit.
• Follow the included instruction sheet during installation and bleeding procedures.
• Inspect the master cylinder and related hydraulic components before reassembly.

Quality Assurance

Each Cardone remanufactured booster is re-engineered, built, and tested to meet O.E. performance expectations. The unit is 100% tested for reliable operation and backed by Cardone’s guaranteed fit and function positioning for the listed applications.

Vehicle Fitment

• Fits 2015-2020 Chevrolet Silverado 2500 HD, N/A. Fits vehicles lacking master cylinders; Hydro-Boost Power Brake Booster.
• Fits 2015-2020 Chevrolet Silverado 3500 HD, N/A. Fits vehicles lacking master cylinders; Hydro-Boost Power Brake Booster.
• Fits 2015-2020 GMC Sierra 2500 HD, N/A. Fits vehicles lacking master cylinders; Hydro-Boost Power Brake Booster.
• Fits 2015-2020 GMC Sierra 3500 HD, N/A. Fits vehicles lacking master cylinders; Hydro-Boost Power Brake Booster.
• Fits 2016-2019 Chevrolet Suburban 3500 HD, N/A. Fits vehicles lacking master cylinders; Hydro-Boost Power Brake Booster.
• Fits 2015 Chevrolet Silverado 1500, N/A. Fits vehicles lacking master cylinders; Hydro-Boost Power Brake Booster.