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NHTSA Campaign 84V120000

SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE

Issued by GENERAL MOTORS CORP. · Reported Oct 2, 1984 · 3,948 vehicles affected

What's wrong

THE DUAL AIR RESERVOIRS OF SOME TRUCKS WERE EQUIPPED WITH CARBON STEEL SPRINGS INSTEAD OF STAINLESS STEEL SPRINGS, AS INTENDED. THE CARBON STEEL SPRING IS MORE SUSCEPTIBLE TO RUSTING THAN THE STAINLESS STEEL SPRING. THIS RUSTING COULD CAUSE THE CHECK VALVE TO FAIL, CAUSING TOTAL LOSS OF FRONT AND REAR BRAKES.

Remedy

THE AIR TANK WILL BE INSPECTED AND, IF NECESSARY, THE AIR VALVE WILL BE REPLACED WITH ONE CONTAINING A STAINLESS STEEL SPRING.

Vehicles affected by this recall

Make Model Year Units
CHEVROLET C6 1983 3,948
CHEVROLET C7 1983 3,948
CHEVROLET P6 1983 3,948
GMC C6 1983 3,948
GMC C7 1983 3,948

Source: NHTSA Campaign 84V120000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.