When I first bought my 05 LLY/Allison, the truck would puff a little black smoke when you would stomp on it when it was completely stock. I then added a PPE Hot programmer at around 5k miles and it started smoking a lot. And by a lot, I mean I could punch it and make people slow down or pull over until the road cleared up.
I now have 13k on the truck and it hardly smokes at all. I have to pre-boost and hit it wide open to see even a hint of black smoke.
Any idea what’s going on?