So my name is Garry, I've been using HP tuners for almost 10 years, I've been building cars for longer and have made a career out of it. So I have a request to anyone listening. I have found that the 2011+ express vans with the duramax engine and 6l90 are available for purchase very reasonably priced and would be great to rob engines for swaps. Problem is no support yet. I would love to see you guys work on that. I'll bring you one if needed....