Ok got a 2008 Express Van TCM tune. Imported it and it worked. Now the issue is getting the truck to shift. Can you look at the log and tune file and see why it is shifting so high and not going into 2nd. I'm not familiar with LS tunes typically as I tune my 3800 Supercharged setup with way less parameters.
I set the shift rpm at 5800 and the mph at 49mph. It went to 53mph and 6700 and did not shift. What gives?
