[kamiar]

Have you fixed your ECM, it happened to me years ago when I started the Paccar deletes, I had to open it up and flash with Ktag, then only i was able to communicate and flash it back to stock, it was a pain to get the cover off due to the glue around the 3 connectors, but doable if you take your time and make some tools to help you, pls note the connectors edges are very thin and fragile and if you put pressure on them will break and won't seal against the harness connector.