Drum: chamberRecall 87V-121 · Chevrolet and GMC vehicles

GENERAL MOTORS CORP. recall 87V-121 covers 7,870 Chevrolet and GMC vehicles for a drum: chamber problem, reported to NHTSA on August 3, 1987.

Vehicles repairedNo manufacturer report yet

Vehicles affected7,8702 models

ReportedAug 3, 1987Owners notified Aug 6, 1987

Complaints since0Same system, after the recall

Source: NHTSA recall 87V121000 and manufacturer quarterly reports. Started by the manufacturer.

What's wrong

The problem

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.

The risk

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.

What to do

The fix

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

SYSTEM: BRAKESVEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH 7,500 LB. FRONT AXLE AND MEDIUMDUTY TRUCKS EQUIPPED WITH A 7,000 LB. FRONT AXLE.

Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.

2 models

Vehicles in this recall

Chevrolet B6P0421983, 1984, 1985, 1986, 1987

GMC B6P0421983, 1984, 1985, 1986, 1987

Built from October 1, 1982 to June 1, 1987. Not every vehicle in these model years is included; check by VIN.