1977 GMC C30 SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

1977 GMC C30 SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM (Change Vehicle)

The following SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM recall/defect on 1977 GMC C30 vehicles was reported to the National Highway Traffic Safety administration on 1977-08-10. For more information contact the National Highway Traffic Safety administration or the US Department of Transportation. See recall summary below.

Build Years/Makes/Models:	1977 CHEVROLET C30 1977 GMC C30
UNits affected:	1232
Recall Number:	77V119000
Summary:	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.
Consequence:
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.
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.
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