Recalls › 77V119000

NHTSA recall 77V119000

Service brakes, hydraulic › Power assist › Vacuum

Chevrolet C30 and 1 more

Reported Aug 10, 19771,232 vehicles affectedGENERAL MOTORS CORP.

The defect

On the involved vehicles, the nuts which attach the brake master cylinder to the hydro-boost unit may have been over-tightened. This could have caused stripped threads and cracked attaching flanges. Should these nuts fail, the parts may separate and loss of service brakes would result.

The remedy

Dealer will inspect for cracks in the attaching flanges; units with cracks present will be replaced. If no cracks are found, the studs will be removed and the holes drilled out. The unit will be reassembled using bolts and nuts in place of the existing studs.

Official recall at NHTSA ↗

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Vehicles in this recall

Chevrolet C30
1977
GMC C30
1977

Notes

Vehicle description: light trucks.system: service brakes; master cylinder to hydro-boost unit attaching nuts.consequences of defect: loss of braking capability could occur without priorwarning and could cause loss of vehicle control and an accident.