It was also causing my truck to go into "reduced engine power mode" which makes my throttle completly useless...

*My truck has the u7192. It is a 2007 silverado classic, 4.8. My tuner is v9r04.
I have had the tuner installed and running the 93 octane tune for almost 6 months now. Recently started recieving 3 engine codes, all relating to my t.a.c. module (throttle acutator control). I reinstalled my factory ...