1976 GMC C30 Recall

Campaign:: 75V214000 on 10/11/1979
Component:: Service brakes, hydraulic:foundation components:differential proportional valve
Affected:: 39,278
Notes:: Chevrolet campaign no 76c04, pontiac campaign no. 76c7, oldsmobile campaign no.76c1, buick campaign no. 76c1.possibility that the combination valve, whichis a part of the hydraulic service brake system may have been improperlymanufactured and could malfunction.should this condition occur while vehicleis in motion at a time when minimum stopping distance is required.a vehiclecrash could occur without prior warning.(correct by inspecting and replacingvalve where necessary.) passenger cars and light trucks.