I have a H & S XRT PRO Tuner. My LMM Durimax went into limp mode after pulling a fifth wheel trailer up a long hill. I tried to reset code with tuner and now the truck will not crank. I updated Sd card for programmer. I get the Error 316 warning. I'm thinking my communication cord may be bad, as if i hold pressure on the underdash connection it will communicate or load further, but nothing seams to reset PCM to start. It has power, but will not crank. Please call me at 1-307-7224 if you can help or I'll check e-mail for response. I need to go retreave truck as it is standed.