hey guys, ive tuned a few "hot rod" type gen 3 vehicles now but my neighbor was wondering if i could tune his basically stock truck for him for a little more pulling power, truck is a 2015 2500hd with the 6.0, i plan on just doing a couple basic things like messing with PE and putting a couple degrees of timing in it as he doesnt have a wideband or anything like that and im not familiar with LTFT/STFT tuning
also are these 2 or 4 credits for the ecm? and anything i should be aware of before doing a gen 4 for the first time? dont want to brick his ecu lol