I would like to know what positive function the control cards serve? I have 3 civy 6.2's and a couple of cucvs that are electirily , mostly, de-milled. These trucks work fine with no cards. The civilian trucks never had them. Does it relate to STR+ICE? I currently have 2 that are still original. I have no time to fix things that are not broken. The trucks seem more dependable with out some of the military add ons, which are easily bypassed, with no butchery to harness. Just makes me wonder if the people who originally spected and militarized them knew what they were doing.