18-059-17

Flash: Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. 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:P0000-00 - Will be displayed but should really be displaying P0326-00 (Knock Sensor 1 Circuit Performance). The customer may notice one of the following condition(s):Incorrect ambient temperature readings on the Instrument Panel Cluster (IPC). Engine knock issues. In addition, the following software enhancement is also available:4-3 and 3-2 downshift improvements.