NHTSA Campaign Id 71V140000; Date: Aug. 19, 1971
1971 Chevrolet C20; 1971 Chevrolet K20; 1971 Chevrolet K30; 1971 GMC C2500; 1971 GMC C3500; 1971 GMC K2500
Component: Service Brakes, Hydraulic:power Assist:vacuum
Manufactured by: General Motors Corp.
Affected Units:: 136,000
Chevrolet campaign no 71-c-18. GMC campaign no 71-c-10. Exce pt rpo h-22w/11,000 axle. Possibility that power brake vacuu m cylinder (booster can)and/or attaching brackets may developfatigue cracks. If bracket cracks,could permit excessive mo vement of brake cylinder assembly. Continuedoperation couldcrack front hydraulic brake resultant loss of brake fluid in part of dual braking system. Braking system. (correct by repl acing componentswhere necessary. )
Date Owners notified by Manufacturer: Aug 18, 1971
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