Saw this TSB 11-183-18 9/19/18 on Techinfo:
This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM’s diagnosis of DTC P0045: TURBOCHARGER / SUPERCHARGER BOOST CONTROL “A” CIRCUIT OPEN. In some cases, an engine RPM drop may occur when selecting D or R range too quickly following ignition on and before the engine reaches full operation during the ECM’s initial control of the waste gate valve. Should this occur P0045 may set the next time the engine is started.
The new ECM logic was incorporated into production starting with VIN K3414977.
The new ECM logic was incorporated into production starting with VIN K3414977.