[Doug_J]

I think theirs people getting way more than 20hp out of a tune but I could be wrong. A good place to check out for more info on that tuning is gmfullsize.com theirs a lot of them on their that have done it but they’re not very helpful like on here. I’m not very familiar with the 4.8 but I’d say it likes the higher rpms more than off the line, I drove a 4.8 4wd then drove my truck I have now with the 5.3 4wd and that 4.8 didn’t have anything on the 5.3 it was a dog but like i said they was both ccsb 4wds. Now in a rcsb it’s lighter so that 4.8 may move it along pretty good but I just don’t think it’s going to be a monster or anything.