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March 24, 2015 Service bulletin

Power train: manual transmission

Chevrolet technical service bulletin 15178 for 2015 Chevrolet Silverado 1500, 2015 GMC Sierra 1500 and 2015 GMC Yukon and others.

Bulletin number
15178
Component
Power train: manual transmission
Summary
15178 - service update (drive audit message only). General motors has decided that certain vehicles equipped with 8-speed transmission (rpo m5u) may have transmission gear whine noise. To address this condition we will be releasing service update bulletin 15178 as soon as a sufficient quantity of replacement parts is available. It is estimated that only 5% of the involved vehicles will require repair.

Owners of these vehicles have filed 364 complaints in the transmission category.

Vehicles covered

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