Some customers may experience transmission shift or performance concerns as follows:
Intermittent delayed transmission engagement into Drive from initial engine start.
This may be described as no engagement or in some cases harsh engagement if the engine RPM is increased when drive engagement occurs. Further investigation by the technician may find the Clutch Volume Index learned extremely high.
Harsh 2 - 1 Coast Down shifts.
1 - 2 Upshift consistency, quality or smoothness.
Using a Scan Tool (StarSCAN ) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the above symptom/condition is experienced or can be verified, perform the Repair Procedure.
REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE
NOTE:If this flash process is interrupted/aborted, the flash should be restarted.
Reprogram the PCM with the latest software. Follow the detailed service procedures available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Powertrain Control > Standard Procedures > PCM/ECM Programming - Gas.
Perform the Quick Learn function, found in the StarSCAN Misc Function Menu.
Type the necessary information on the "Authorized Modification Label" and attach it near the VECI label.
Reimbursable within the provisions of the warranty.
Tuesday, December 7th, 2010 AT 1:16 AM