21-011-16

Flash: Transmission Enhancements This bulletin involves reprogramming of the Transmission Control Module (TCM) with the latest available software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following Diagnostic Trouble Code (DTC) stored in the TCM memory: U0404 - Invalid Data Received From Gear Shift Control Module "A". In addition, some customers may experience the following condition: The M on the shifter and Instrument cluster may be blinking.