1984 Gmc B6p042 Recalls

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NHTSA Campaign Number: 87V121000
Manufacturer: GENERAL MOTORS LLC
Manufactured Begin Date: October 1st, 1982
Manufactured End Date: June 1st, 1987
Date of Owner Notification: August 6th, 1987

Defect Summary:
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 Summary:
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.

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

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

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NHTSA Campaign Number: 86V086000
Manufacturer: GENERAL MOTORS LLC
Manufactured Begin Date: October 1st, 1982
Manufactured End Date: January 1st, 1986
Date of Owner Notification: August 15th, 1986

Defect Summary:
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 OF DEFECT: BRACKETS CAN BREAK, RESULTING IN LOSS OF BRAKING ABILITY AT THE FRONT WHEEL, AND POSSIBLY RESTRICT STEERING, WHICH COULD LEAD TO A VEHICLE CRASH WITHOUT PRIOR WARNING.

Corrective Summary:
AS NECESSARY, REPLACE FRONT BRAKE CHAMBER MOUNTING BRACKETS AND INSTALL A FRONT BRAKE LIMITING VALVE.

Recall Notes:
SYSTEM: BRAKES. VEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH A 7500 LB. FRONT AXLE AND WITHOUT A FRONT BRAKE LIMITING VALVE.

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NHTSA Campaign Number: 84V134000
Manufacturer: GENERAL MOTORS LLC
Manufactured Begin Date: November 1st, 1981
Manufactured End Date: April 1st, 1984
Date of Owner Notification: October 26th, 1984

Defect Summary:
VEHICLES HAVE A PRIMARY AND A RESERVE BRAKING SYSTEM. IF THE PRIMARY BRAKE SYSTEM BOOSTER FAILS, UNDER SOME CIRCUMSTANCES THE RESERVE SYSTEM MAY ALSO MALFUNCTION AND BRAKING ABILITY WILL BE IMPAIRED.

Corrective Summary:
DEALER WILL INSTALL A NEW RESERVE BRAKE CONTROL MODULE AT NO COST TO OWNER.

Recall Notes:
VEHICLE DESCRIPTION: SCHOOL BUSES AND FORWARD CONTROL CHASSIS TRUCKS EQUIPPEDWITH HYPOWER DUAL HYDRAULIC BRAKE SYSTEMS.SYSTEM: SERVICE BRAKES; HYDRAULIC BRAKE SYSTEM, RESERVE BRAKES SYSTEMELECTRONIC CONTROL MODULE.CONSEQUENCES OF DEFECT: A REDUCTION OF BRAKING ABILITY IN A SITUATION WHENMINIMUM STOPPING DISTANCE IS REQUIRED COULD RESULT IN AN ACCIDENT WITHOUT PRIORWARNING.