I order a remote mount PMD from Pensacola Diesel for $279 to try and fix the problem.
The new PMD came with a 6′ extension cable, Resistor, Heatsink, zip ties and the new PMD.
The 6′ cable is the key to making this a 10 min fix on the truck. I left the old PMD in place and simply disconnected the harness cable (the hardest part) and Plugged it in to the new harness extension. I ran the new cable down to the bumper (making sure that it clears all moving or hot parts). I dropped in the resistor, bolted the new heat sink/PMD to the bumper, and plugged in the harness. I then turned the key and it fired right up. I have put about 100 miles on the new PMD and have no problems yet.
Took about 10 mins total.
I hope to write a new post soon with pictures and more details.