18-009-20

Flash: Powertrain Control Module (PCM) and Transmission Control Module (TCM) Updates This is a coordinated bulletin that involves reprogramming the PCM and TCM,at the same time, with the latest available software.Both the PCM and TCM must be up to date for these changes to be effective. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DiagnosticTrouble Code (DTC):P0456 - EVAP System Small Leak. Customers may also experience the following:Extended engine crank times. The following improvement is also included:Transmission coast-down shift quality improvements.