MyDefectiveGMC

So love my AT4 3L diesel but since April had nothing but trouble with the transmission. They flew in a GM engineer. He said it was a module. It finally came in. Changed it out. Didn't go 10 miles down the road before it started doing the same thing. Now they've changed out the transmission. Didn't even take it for a test drive after replacing it very next morning had the same problems.. now they're telling me they're supposedly an update coming out in October that will fix it. Meanwhile I have 50K plus vehicle that is practically undrivable.