Hey guys, don't know if you've run into this. 2010 Chevy 5.3, 6-speed. Went to "read" file and once it reached 50%, it turned the lights on and said power reduction. Once it was done, it has a TCM comm error. There's no gear indicator, doesn't shift and stays in what seems to be 3rd gear. Tried reading again, did identical thing.
Any idea's?
