Originally Posted by GPappy
I am adding a tuner to my Duramax and need to get the transmission built to handle the extra horsepower. I have considered trying it myself with a Suncoast or PPE kit but would prefer to have a professional do it if the cost is not too unreasonable. Anyone know of a good place to get a transmission built in Mid Michigan?
From what I've heard Dirty Hooker in the thumb does great work.