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Showing results for tags '8 speed transmission clunk'.
Good Day All. I own a 2016 GMC Sierra 5.3 V8 with equipped with the 8 speed transmission and 12,500 miles. After about 6 months or so, I began to notice a distinct 'clunk' when upshifting at moderate to light acceleration. Initially, I ignored it, since it was random and occurred relatively infrequently. Since then, the hesitation & clunking has increased in frequency, especially on cold morning starts when taking the truck out after sitting overnight. Subsequently, I did a search of this forum and others, and saw other 8 speed Sierra/Silverado owners were experiencing the