So I'm about to do an ATF drain and fill this weekend on my 06 denali with 90K and I'd like to transition to synthetic. I found an ac delco dexron vi synthetic on Amazon for what appears to be a good price. The problem is that I can't find any reviews on it (anywhere) and it looks like it was just released sometime last year. I figure since it's ac delco and dexron vi what could go wrong but I wanted to see if anyone here has any experience with it before I pull the trigger.