mine is at the dealer now with similar problems. started with bat. light ,then rough running, then a no-start. dealer replaced the alt,swapped out the ficm,pcm, checked for wire chaffing,relays ,fuses,etc. truck run a couple hours and shut off . dealer diesel tech is perplexed and now thinks it's a short somewhere, maybe in one of the injectors. It's been at the dealer 9 days now....also , no codesDealer can't find problem. Bat light also comes on from time to time and engine shuts off like the key was turned off. Always starts right back up. No codes. Dealership thinks its an electrical connection. Has anybody else had this problem?