I've seen references to software (for a laptop) and portable diagnostic boxes that give you all sorts of info from the ECM. Anyone use these things or know anything about them? Web sites or other references would be good. I saw allot of references to it on 3rd Gen but I thought I would ask here first. Last thing I need is yet another web forum to get wrapped up in. Russ 85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.