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).
