Foundation components: master cylinderRecall 77V-111 · Chevrolet and GMC vehicles
GENERAL MOTORS CORP. recall 77V-111 covers 12,963 Chevrolet and GMC vehicles for a foundation components: master cylinder problem, reported to NHTSA on July 15, 1977.
Source: NHTSA recall 77V111000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
ON THE INVOLVED VEHICLES, THE BRAKE MASTER CYLINDER MAY HAVE BEEN ASSEMBLED WITH RESERVOIR MOUNTING BOLTS THAT WERE IMPROPERLY PROCESSED. THIS COULD MAKE THESE BOLTS BRITTLE AND SUBJECT TO BREAKING. IF BREAKAGE OCCURS, A BRAKE FLUID LEAK MAY DEVELOP BETWEEN THE RESERVOIR AND MASTER CYLINDER. LOSS OF BRAKE FLUID WOULD ADVERSELY AFFECT VEHICLE BRAKING CAPABILITY.
The fix
DEALER WILL REPLACE THE MASTER CYLINDER RESERVOIR MOUNTING BOLTS WITH AN IMPROVED TYPE, WITHOUT CHARGE TO OWNER.
VEHICLE DESCRIPTION: VANS AND MOTORHOMES EQUIPPED WITH HYDRO-BOOST ASSISTSYSTEMS.SYSTEM: SERVICE BRAKES; HYDRAULIC MASTER CYLINDER.CONSEQUENCES OF DEFECT: PARTIAL LOSS OF BRAKING CAPABILITY COULD OCCUR,RESULTING IN LOSS OF VEHICLE CONTROL AND AN ACCIDENT.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.