NHTSA Campaign 05V043000

SERVICE BRAKES, HYDRAULIC

Issued by GENERAL MOTORS CORP. · Reported Feb 8, 2005 · 77,411 vehicles affected

What's wrong

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.

Consequence

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.

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.

Vehicles affected by this recall

Make Model Year Units
CHEVROLET AVALANCHE 2004 77,411
CHEVROLET AVALANCHE 2005 77,411
CHEVROLET EXPRESS 2004 77,411
CHEVROLET EXPRESS 2005 77,411
CHEVROLET KODIAK 2004 77,411
CHEVROLET KODIAK 2005 77,411
CHEVROLET SILVERADO 2004 77,411
CHEVROLET SILVERADO 2005 77,411
CHEVROLET SUBURBAN 2004 77,411
CHEVROLET SUBURBAN 2005 77,411
GMC SAVANA 2004 77,411
GMC SAVANA 2005 77,411
GMC SIERRA 2004 77,411
GMC SIERRA 2005 77,411
GMC TOPKICK 2004 77,411
GMC TOPKICK 2005 77,411
GMC YUKON XL 2004 77,411
GMC YUKON XL 2005 77,411
HUMMER H2 2004 77,411
HUMMER H2 2005 77,411

Source: NHTSA Campaign 05V043000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.