NHTSA Campaign Id 71V101000; Date: Jun. 11, 1971
1960 GMC 5000; 1961 GMC 5000; 1962 GMC 5000; 1963 GMC 5000; 1964 GMC 5000; 1965 GMC 5000; 1960 GMC 5500; 1961 GMC 5500; 1962 GMC 5500; 1963 GMC 5500; 1964 GMC 5500; 1965 GMC 5500; 1960 GMC 6000; 1961 GMC 6000; 1962 GMC 6000; 1963 GMC 6000; 1964 GMC 6000; 1965 GMC 6000; 1960 GMC 6500; 1961 GMC 6500; 1962 GMC 6500; 1963 GMC 6500; 1964 GMC 6500; 1965 GMC 6500; 1960 GMC S5000; 1961 GMC S5000; 1962 GMC S5000; 1963 GMC S5000; 1964 GMC S5000; 1965 GMC S5000
Component: Engine And Engine Cooling:engine
Manufactured by: General Motors Corp.
Affected Units:: 22,206
GMC campaign no 65-c-2. Series 5000, 5500, 6000 and 6500 truc KS and series5000 school buses equipped with 401 or 478 gasol ine engines. School bus. Possibility that 14" flanged-type f lywheel and clutch assembly has intergralflange as part of FL ywheel. Could create safety hazard when rotating speedsare a pproximately double the governed engine speed. Improper drivi ngtechniques or driver error, such as misshifting transmissio n when downshiftingalso can cause this condition. (correct b y installing new flywheel and clutchassembly. )
Date Owners notified by Manufacturer: Jun 9, 1971
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