NHTSA Campaign Id 78V162000; Date: Jul. 27, 1978
1977 Chevrolet J95; 1977 GMC HE75; 1978 GMC HE75; 1977 GMC JH95; 1978 GMC JH95; 1977 GMC JJ95; 1978 GMC JJ95
Component: Service Brakes, Air:supply:hoses, Lines/piping, And Fittings
Manufactured by: General Motors Corp.
Affected Units:: 1,278
The rear brake line may have been improperly routed to the main air tank. Should a major air leak develop in the rear brake system, the vehicle would fail to comply with the requirements of federal motor vehicle safety standard no. 121, "air brake systems". This would cause the entire brake system to vent to the atmosphere and braking effectiveness would be lost.
The dealer will properly route the air brake line to the main air tank, if necessary, at no cost to owner.
Vehicle description: heavy trucks. System: service brakes; rear brake line. Consequences of defect: loss of brakes could lead to loss of vehicle controland an accident.
Date Owners notified by Manufacturer: Jul 31, 1978
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