Bosch 0204777601 Power Brake Booster

Bosch Hydro-Boost Brake Booster

The Bosch Brake Booster 0204777601 is a hydro-boost assembly built for heavy-duty braking performance in select Chevrolet and GMC trucks and SUVs. It is a direct-fit power brake booster solution for drivers replacing a worn or failing brake booster on compatible Silverado, Sierra, and Suburban HD applications.

Bosch Brake Booster line components are engineered for brake system service where consistent pedal assist and dependable hydraulic operation are required. This hydro-boost assembly supports the braking demands of larger vehicles that rely on hydraulic boost rather than a conventional vacuum booster.

Key Features

• Hydro-boost assembly for power brake assist
• Bosch part number 0204777601 for service identification
• Brake booster replacement for heavy-duty Chevrolet and GMC applications
• Direct fit for select Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, Sierra 3500 HD, and Suburban 3500 HD models
• Interchanges with 84472897 for the same application

Detailed Description

This Bosch power brake booster is intended for vehicles that use hydraulic brake assist to deliver firm, responsive pedal feel. It is a fitment-based replacement for 2015-2019 Chevrolet Silverado 2500 HD, 2015-2019 Chevrolet Silverado 3500 HD, 2016-2019 Chevrolet Suburban 3500 HD, 2015-2019 GMC Sierra 2500 HD, and 2015-2019 GMC Sierra 3500 HD. If you are searching for a Bosch 0204777601 brake booster for a Silverado 2500 HD or Sierra 3500 HD, this hydro-boost assembly matches those listed applications.

Use this part when servicing a brake booster that no longer provides proper assist, has internal hydraulic wear, or is causing inconsistent brake pedal response. The Bosch 0204777601 is a practical replacement for technicians and owners maintaining heavy-duty GM brake systems.

What It Helps Address

• Hard brake pedal feel
• Reduced power assist from a failing hydro-boost unit
• Brake response inconsistency during normal driving or towing use
• Hydraulic booster wear in high-load truck and SUV brake systems
• Replacement needs for a listed OE-style brake booster application

Installation Notes and Tips

Confirm the vehicle’s brake assist system before ordering, since this part is for hydro-boost applications only. Verify the part number 0204777601 against the original unit and match the vehicle year, make, and model exactly to the fitment list. After installation, inspect the brake hydraulic system and bleed as required by the vehicle service procedure.

Quality Assurance

Bosch is a recognized automotive parts manufacturer with a broad brake system catalog. This brake booster is listed for direct application coverage on the specified Chevrolet and GMC models and cross-references 84472897 for the same use.