Have a 2015 Chevy Express Van that I just swapped a 6L into (for work) since GM is fresh out of 4.8L long blocks in my area. Any guidance as to what is going to be different in the tunes between the two. I know that the 6L90 is mated to either engine in this application so I don't think I'm going to need to change any trans maps. New to hp tuners and tuning in general so a base map would be sweet unless someone would like to give me a bit of a walkthrough. TIA