So even on a bench harness, no go?
I had this same issue a few months back with an Lly ECM. Had to remove it and send it in to Socal for bench harness reflash, luckily it worked. I ran my spare ECM in the customers truck while his was at socals.
I had this same issue a few months back with an Lly ECM. Had to remove it and send it in to Socal for bench harness reflash, luckily it worked. I ran my spare ECM in the customers truck while his was at socals.