**UPDATE** I removed the TC today as I had some serious electronic issues come up early last week. Monday while driving to work my truck went into "limp mode" as I wasn't able to drive faster that 10 mph. I had all types of lights warning in instrument cluster. I pulled over and shut the truck off and let it sit for a few, but no change. Thankfully I was close to work, so I parked it for the day. That same day I received 3 emails from OnStar Notifications, "Issue with Anti-Lock Braking System, Issue with StabiliTrak Stability Control System and Issue with Engine and Transmission, all recommend immediate service.
When I left work, I started the truck and it ran like shit, it felt like it was missing cylinders. I went under the dash unplugged the TC, plugged it back in and everything went away with the exception of the engine light. I was able to drive it normally so when I got home I disconnected the battery and reprogrammed the TC. The engine light went off, but over the past couple of days, the truck didn't feel right. While driving and maintaining 60 mph, then engine would surge. It wasn't crazy I but could hear it (aftermarket exhaust) and watch the tach move about 1/8 of an inch.
It was nice to have the added throttle response but the risk of this happening again, isn't worth it. So this will sit in my garage and collect dust. Hopefully this doesn't happen to anyone else, but if you get some crazy warnings, I'll bet it is the TC.