Todd, I respectfully disagree. The dealers can't diagnose and follow a repair procedure from GM if GM refuses to formally recognize the issue and offer a fix. And fix isn't even the proper word here. These transmissions are performing the way GM engineered and programmed them to, so in their eyes there is no need for a "fix". I truly believe this is due to a purposeful decision on GM's part to forego performance for the sake of fuel mileage. Period. I think their thought process was to put this product out to market as is because "John Q Public won't know the difference". For the relatively small group of us that do know the difference, they ARE turning a blind ear. The least they could do is allow the dealers to change the tune for those of us that what it. I for one would be more than willing to give up a few MPG to get decent performance out of my tranny. I feel like I bought a 50K piece of junk and I feel GM duped me. Being a long time GM guy, this leaves me in a bind with nowhere to go. So my options are what? Dump my Sierra and then what? Get a Ford, Dodge, GOD forbid a Toyota!!!! No offense to any of those brand owners, those just aren't my cup of tea. Thanks a lot for the rock and a hard place GM!