GMC Safari owners have reported 2 problems related to driveshaft (under the power train category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of GMC Safari based on all problems reported for the Safari.
While driving over 50 mph vehicle vibrated. Consumer was in touch with the dealer and manufacturer, but the problem still existed. Consumer stated that the driveshaft was the problem, yet they won't do anything about it.
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The drive shaft splines needs constant lubrication. There is also leaking from the transmission extension housing.