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February 21, 2019 Service bulletin

Power train

Chevrolet technical service bulletin PIP4021D for 2007-2019 Chevrolet Silverado 1500, 2009-2019 Chevrolet Tahoe and 2009-2019 GMC Sierra 1500 and others.

Bulletin number
PIP4021D
Component
Power train
Summary
This Preliminary Information communication provides information to the technician that a whine noise heard from the automatic transmission fluid pan hear with the the key on and engine off, or for up to one minute after the vehicle has been shut off should be deemed a normal characteristic.

Owners of these vehicles have filed 3,994 complaints in the transmission category.

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