Supersedes Technical Service Bulletin Group 24 number 12-38 dated August 24, 2012. A delay and shudder is felt when vehicle is driven from a stop. Shuddering is felt on acceleration from under 15 mph. The complaint can be reproduced, but no fault can be found. Incorrect calibration of the engine control module (ECM), J623 (address word 01) and of the transmission control module (TCM), J217 (address word 02).
