Flash: Transmission Shift And Drivability Enhancements
This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software.
Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one of the following Diagnostic Trouble Code (DTCs) stored
in the TCM memory:
P061B-00 - Internal Control Module Torque Calculation Performance.
P072F-00 - Stuck In Gear 4.The following enhancements are included in the software update:
Transmission shift quality enhancement in conjunction with Powertrain Control Module (PCM) reprogram.
7-8 gear increase shift at higher speed.
8-9 gear shift will happen on a downhill only.
Coast down bump on 7-6, 6-5, 5-4, 5-3 downshift improvements.
Cold 1-2, 2-3 upshift improvements.
1-2, 2-3 upshift flare control improvements.
Power-on upshift improvements.
Lift Foot Upshift 2-3, 4-5, 8-9 improvements.
Improve transmission shift enhancements for sand and snow mode.
Vehicle performance enhancements.
