The problem
Certain trucks, sport utility vehicles, and vans equipped with Bosch hydro-boost brake assemblies, the hydraulic brake booster pressure accumulator May crack and separate from the hydro-boost assembly during normal operating conditions.
The risk
If a separation occurred and the hood of the vehicle were open, fragments from the accumulator could cause injury to people in the immediate area. The presence of this crack or fractured surface could allow the hydraulic fluid to leak from the accumulator circuit of the booster assembly. The loss of fluid would cause increased steering and braking effort and a crash May occur without prior warning.
The fix
Dealers will test the hydro-boost assembly for functional operation of the two-function valve. If the hydro-boost assembly fails the test, dealers will replace the assembly free of charge. The recall began on March 23, 2005. Owners May contact Chevrolet at 1-800-630-2438, GMC trucks at 1-866-996-9463 and Hummer at 1-800-732-5493.
Recall details
| NHTSA campaign | 05V-043 (05V043000) |
|---|---|
| Manufacturer number | 05006 |
| Manufacturer | General Motors, LLC |
| Component | Service brakes, hydraulic |
| Report date | February 8, 2005 |
| Owners notified | March 23, 2005 |
| Vehicles affected | 77,411 |
| Initiated by | Manufacturer |
Vehicles covered
- 2004 Chevrolet Avalanche
- 2005 Chevrolet Avalanche
- 2004 Chevrolet Express
- 2005 Chevrolet Express
- 2004 Chevrolet Kodiak
- 2005 Chevrolet Kodiak
- 2004 Chevrolet Silverado
- 2005 Chevrolet Silverado
- 2004 Chevrolet Suburban
- 2005 Chevrolet Suburban
- 2004 GMC Savana
- 2005 GMC Savana
- 2004 GMC Sierra
- 2005 GMC Sierra
- 2004 GMC Topkick
- 2005 GMC Topkick
- 2004 GMC Yukon XL
- 2005 GMC Yukon XL
- 2004 Hummer H2
- 2005 Hummer H2
Owner complaints about the brakes
- 2004 Chevrolet Avalanche brake problems 42
- 2005 Chevrolet Avalanche brake problems 5
- 2004 Chevrolet Express brake problems 6
- 2005 Chevrolet Express brake problems 6
- 2004 Chevrolet Kodiak brake problems 1
- 2005 Chevrolet Kodiak brake problems 2
- 2004 Chevrolet Silverado brake problems 211
- 2005 Chevrolet Silverado brake problems 87
- 2004 Chevrolet Suburban brake problems 49
- 2005 Chevrolet Suburban brake problems 25
- 2004 GMC Savana brake problems 2
- 2005 GMC Savana brake problems 2
Frequently asked questions
Is the recall 05V-043 repair free?
Yes. Chevrolet dealers will fix the problem at no cost: Dealers will test the hydro-boost assembly for functional operation of the two-function valve. If the hydro-boost assembly fails the test, dealers will replace the assembly free of charge. The recall began on March 23, 2005.
How do I know if my car is included?
Not every vehicle of the listed model years is affected — the recall covers 77,411 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.