GMC TSB #18NA379

2019 GMC Terrain

TSB Document:

Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION

Summary
This technical bulletin provides a procedure to program the TCM to correct the customers concern of a MIL Illuminated, Vehicle wont go above 25 mph and/or 1-2 Shifts feel like a momentary tie up.

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Date Published
OCT 12, 2020
NHTSA TSB #
10183163
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