I was pulling a 5th wheel camper two days ago and has my'09 3500 DRW on CC at +- 80. We were pulling a slight South Mississippi hill when the truck down shifted, I heard a medium volume pop, I thought I blew a hose to my heater core, but the sound came more from the middle of the truck to the driver's side. Also, there wasn't and hasn't been any fluid leaked. No obvious breaks on anything. The truck will crank up and then run for 1-2 seconds at most then die. I was running a bank's economind tuner on stock. While using a PPEI tuned DSP5, I was running on my #2 tow tune. The banks IQ throwed a crankshaft position sensor code or error. My autocal only shows two codes, U0100 and U0101. Failure to communicate with ECM and TCM. Any help would be greatly appreciated. This is my welding rig, work truck, so I need to get it running in the worst kind of way..