21-018-14 REV. B

Flash: Transmission Shift and Diagnostic Enhancements This bulletin involves flash reprogramming of the Transmission Control Module (TCM) with new software.Vehicles that are being updated from TCM software p/n 682235$$AN or 682354$$AN ($$ are wild cards for any number) will not require the 9 Speed Adaptation Drive Learn Procedure to be performed. However, vehicles being updated from any other software part number will require the Adaptation Drive Learn Procedure to be performed. Refer to all applicable published service bulletins regarding the 9 Speed Adaptation Drive Learn procedure for detailed repair procedures and labor times. Diagnostic Trouble Code (DTC) robustness improvements are included in this software release. These improvements apply to the following DTCs: P072F- Stuck in Gear 4 P076F- Gear 7 shift incorrect ratio P0810- Clutch position control error P1CC9- Unable to engage gear P0734- Gear 4 shift incorrect ratio P061B- Internal control module torque calculation performance