The defect
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 remedy
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.
NHTSA's own wording · initiated by MFR
Vehicles covered
Components: SERVICE BRAKES, HYDRAULIC
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Chevrolet Avalanche | 2004 | 165 | 5 |
| Chevrolet Avalanche | 2005 | 71 | 3 |
| Chevrolet Express | 2004 | 21 | 6 |
| Chevrolet Express | 2005 | 23 | 8 |
| Chevrolet Kodiak | 2004 | 5 | 5 |
| Chevrolet Kodiak | 2005 | 3 | 3 |
| Chevrolet Silverado | 2004 | 622 | 8 |
| Chevrolet Silverado | 2005 | 316 | 8 |
| Chevrolet Suburban | 2004 | 204 | 4 |
| Chevrolet Suburban | 2005 | 129 | 6 |
| GMC Savana | 2004 | 12 | 7 |
| GMC Savana | 2005 | 13 | 5 |
| GMC Sierra | 2004 | 188 | 7 |
| GMC Sierra | 2005 | 117 | 9 |
| GMC Topkick | 2004 | 5 | 5 |
| GMC Topkick | 2005 | 1 | 3 |
| GMC Yukon XL | 2004 | 87 | 3 |
| GMC Yukon XL | 2005 | 42 | 5 |
| Hummer H2 | 2004 | 59 | 3 |
| Hummer H2 | 2005 | 79 | 2 |
Other service brakes, hydraulic recalls in 2005
25 of the 562 recall campaigns reported to NHTSA in 2005 concerned the service brakes, hydraulic; GENERAL MOTORS CORP. filed 1,195 campaigns in all.
| 05V564000 13 Dec 2005 | WABASH NATIONAL CORPORATION |
| 05V554000 8 Dec 2005 | DAIMLERCHRYSLER CORPORATION |
| 05V452000 5 Oct 2005 | AMERICAN SUZUKI MOTOR CORP. |
| 05V428000 22 Sept 2005 | HARLEY-DAVIDSON MOTOR COMPANY |
| 05V426000 20 Sept 2005 | FREIGHTLINER LLC |
| 05V409000 15 Sept 2005 | MITSUBISHI MOTORS NORTH AMERICA, INC. |
| 05V379000 29 Aug 2005 | GENERAL MOTORS CORP. |
| 05V367000 26 Aug 2005 | BMW OF NORTH AMERICA, LLC |
NHTSA recalls (public domain) · all recalls of 2005