On another 1500 diesel forum there is a post about this programmer. It's by rollinsmoke diesel if I recall. I'm curious myself, but skeptical about add ons. I can just see the codes getting thrown all the time and then some knucklehead on here complaining how his ed is nothing but trouble and is throwing cels all the time. I'm personally interested in the add on gauges like the edge insight cts. It doesn't change any settings just gives you more info as to what's going on.