NHTSA Campaign Id 67V089000; Date: Oct. 9, 1967
1967 GMC E4500; 1967 GMC E5500; 1967 GMC E6500; 1967 GMC S5500; 1967 GMC S6500
Component: Service Brakes, Hydraulic:power Assist
Manufactured by: General Motors Corp.
Affected Units:: 14,012
Possibility that a lack of brake power assist may be caused by a defective check valve or by possible interference between the booster actuating huband dust seal retainer on the firewall. Loss of power assist will result in higher than normal brake pedal effort and make it difficult to stop within a satisfac- tory distance. (inspect, test, and replace parts as required. )
Date Owners notified by Manufacturer: Oct 9, 1967
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