It sounds like there may be a fix??
Hello all, last night the service manager from the dealership I 5163482)purchased my 19' Silverado Duramax came by and gave me a copy of a bulletin (#18-NA-334: Information on perceived longer crank, hesitation feel and / or surge - dated Feb 2, 2019 - document #5163482). It appears to me that there are three sections that may apply to my / our issue(s) (Transmission Torque Request Override, Transmission Adapt Learns and Change in Torque Converter Lock Up Strategy). He told me that he was not accepting what the bulletin was saying because he didn't feel he could go to his customers (three more complaining just last week) and tell them this is how it is and to keep driving their truck and it should eventually correct itself. So, he asked me to drop my truck off this week for a day or two and they have a procedure to perform that he believes may solve the issue. He said they have a test procedure from the GM field reps that they will perform which will probably result in from one to three sensors needing to be replaced as well as a re-flash of the computer which will reset the Adapt Learning of the transmission all over again. I will report how this goes.