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May 27, 2021 Service bulletin

Power train

Chevrolet technical service bulletin PIP5621B for 2015-2018 Chevrolet Malibu, 2017-2018 Chevrolet Silverado 1500 and 2015-2018 Chevrolet Impala and others.

Bulletin number
PIP5621B
Component
Power train
Summary
This Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.

Owners of these vehicles have filed 4,245 complaints in the transmission category.

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