I have found that any of the performance modules and/or downloaders are only I part to the performance and mpg puzzle. You need to give a diesel engine a way to breathe better. Cold air intake and a 5 in turbo back exhaust will help.

I have an 03 with a power puck, truck runs great. I have a VA 3.1 that I wanted to add on to the 03. The VA 3.1 came from my 04 ( I put the VA 3.2 on that) Will the Van Aaken 3.1 work with the power puck?