I have several mods done to my rig. I took the truck in for a warranty repair for the first time to the dealer a couple of weeks ago. Before taking the truck in, I removed my 'Edge Comp' controller. Today I dropped off the truck to have the radiator flushed and filled. As I watched the service tech key in my information, I saw a note on the system which read that I had modified the intake, exhaust and fueling systems. How could they know this? Did the 'Edge' throw off some sort of a code in the computer that they were able to read?