21-018-17 REV. A

Flash: Transmission Shift and Driveability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):P0887 - TCM Power Control Circuit High. P1720 - Output Speed Sensor-Wheel Speed Rationality. P1634 - Output Speed Sensor-Wheel Speed Rationality. P1DCCD - TCM Monitoring Processor Performance Multiple Clutches Locked Up. P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance. P1DAD - Input Shaft-Output Shaft Direction Correlation. P1CC9 - Unable To Engage Gear. In addition the following enhancements are included:Calibrations to support changes in air flow to protect the catalyst. Transmission shift quality. Enable the capability to capture non-DTC control module data through the Uconnect data recording system.