Well, I went out to start the Sub this morning and it wouldn't fire. It was -1F, but was plugged in all night, so I called that local diesel shop (K&S Fuel Injection) and they actually drove out to my house with diagnostic tools and a new PMD just in case. It turns out that the PMD was bad, so they replaced it with a Heat Sync unit from Diesel Services Group.
It fired right up and has run fine so far today. I did however have another weird symptom though. While driving back to work the WTS light came on and the voltage meter dropped for a split second. Another problem? Oh and by the way, the dealership that sold me the truck is picking up the tab. Not a bad deal!
Mike