18-001-14

Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code (DTC) has been set: ? P0456 - Evap System Small Leak In addition, the following software enhancements are available for D2, DJ, and DD vehicles equipped with a 5.7L engine (sales code EZC) ? Transmission torque management enhancement when shifting from drive to reverse. ? Additional powertrain enhancements to the intake manifold Short Runner Valve (SRV) system. ? Additional powertrain enhancements for block heater applications (sales code NHK).