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Vehicle Make / Model:     Model Year(s):
     CHEVROLET / AVALANCHE     2004-2005
     CHEVROLET / EXPRESS     2004-2005
     CHEVROLET / KODIAK     2004-2005
     CHEVROLET / SILVERADO     2004-2005
     CHEVROLET / SUBURBAN     2004-2005
     GMC / SAVANA     2004-2005
     GMC / SIERRA     2004-2005
     GMC / TOPKICK     2004-2005
     GMC / YUKON XL     2004-2005
     HUMMER / H2     2004-2005
Manufacturer: GENERAL MOTORS CORP. Mfr's Report Date: FEB 04, 2005
NHTSA CAMPAIGN ID Number: 05V043000 NHTSA Action Number: N/A
Component: SERVICE BRAKES, HYDRAULIC
Potential Number of Units Affected: 77411
Summary:
 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.
Notes:
 GM RECALL NO. 05006. CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

 
 

 

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