Hey people. I have an 08 2500, edge attitude programmer, 35" nitto tires rest is mainly stock other than looks. I'm looking to do the next upgrade that would be the most benefit to me. I pull a 20' enclosed trailer at least 4 days a week and live in Colorado so it up and down the hill everyday. Just wondering what direction to go next. Should it be performance or mileage if so what part.

 

I would get gauges first, so you can check what you have.
My next thing would be trans upgrades.

 

I would throw the edge out the window. Or find another noob to buy it. And get efi live and delete it. When I first deleted mine ( back in early 08 and everyone was first learning the 6.7) I had the exhaust foolers then had to use the edge to clear codes and that thing ran OK until I went smarty. But now I'm with efi. And its amazing. I got a buddy that does tuning

 

yep X2. Deletes will give you the best gain.