NHTSA Campaign Id 67V070000; Date: Aug. 29, 1967
1966 Chevrolet HG70; 1966 Chevrolet HM70; 1966 GMC HG5500; 1966 GMC HG7500; 1966 GMC HM5500; 1966 GMC HM7500
Component: Steering:wheel And Handle Bar
Manufactured by: General Motors Corp.
Affected Units:: 3,440
Possibility that the lower steering shaft flexible coupling may have reduced flexibility due to insuffi- cient tolerance in assembly. Normal differences in movement between vehicle cab and chassis components could force the coupling upward and cause the lower steering shaft splines to become disengaged from matching splines on the lower steering shaft flange, with resultant loss of steering control. (inspect and replace coupling with adjustable spline type as required. )
Date Owners notified by Manufacturer: Aug 24, 1967
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