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NHTSA Campaign 87V121000

SERVICE BRAKES, AIR:DRUM:CHAMBER

Issued by GENERAL MOTORS CORP. · Reported Aug 3, 1987 · 7,870 vehicles affected

What's wrong

SEVERE BRAKE CHATTER MAY CAUSE THE BRAKE CHAMBER MOUNTING BRACKETS ON EITHER SIDE TO DEVELOP CRACKS IN THE WELD AREA WHERE THE S CAM SHAFT TUBE ATTACHES TO THE CHAMBER SUPPORT SECTION.

Consequence

BRACKETS CAN BREAK, RESULTING IN LOSS OF BRAKING ABILITYAT THAT FRONT WHEEL, AND POSSIBLY RESTRICTED STEERING, WHICH COULD LEAD TO AVEHICLE CRASH WITHOUT PRIOR WARNING.

Remedy

AS NECESSARY, INSTALL NEW REINFORCED FRONT BRAKE CHAMBER MOUNTING BRACKETS AND INSTALL A FRONT BRAKE LIMITING VALVE ON VEHICLES WITHOUT ONE.

Vehicles affected by this recall

Make Model Year Units
CHEVROLET B6P042 1983 7,870
CHEVROLET B6P042 1984 7,870
CHEVROLET B6P042 1985 7,870
CHEVROLET B6P042 1986 7,870
CHEVROLET B6P042 1987 7,870
GMC B6P042 1983 7,870
GMC B6P042 1984 7,870
GMC B6P042 1985 7,870
GMC B6P042 1986 7,870
GMC B6P042 1987 7,870

Source: NHTSA Campaign 87V121000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.