TSB Document:

• SB-10047821-5000.pdf

Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

Summary

CHEVROLET: WHEN DRIVING AT HIGH SPEEDS, DO NOT HAVE THE ABILITY TO DOWNSHIFT, UNTIL VEHICLE SPEED IS REDUCED TO LOWEST POSSIBLE SPEED (100MPH). MODEL 2012-2013 IMPALA. *PE

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