Hello, I just want to give everyone an update to this topic. I was battling with my deal for a couple years to get this issue resolved. It was the same answer over and over, "we are waiting for GM to come out this a solve for the issue, yadda yadda." Well about a month ago, I received a call stating there was a bulletin out for the issue and to bring my truck in. They told me there is a new transmission fluid out to make the torque converter run smoother and they were going to have to flush the tranny and reflash the computer with an update. I'm happy to say that for over two or three months and a couple oil changes, I have not experienced any shutter what do ever.