Fixed/resolved - pmd extension harness issue
Turned out to be the PMD extension Harness. Truck is starting right up with PMD at original harness and fuel flowing back to injectors again.
Another site recommended to place PMD back into original location to troubleshoot and rule out extension harness (the relocated PMD harness). I simply did not think of that.
The defective extension harness was not allowing the fuel shutoff solenoid to open, causing DTC 13 code, causing no fuel to injectors, causing no start.
I checked for operation of solenoid (at solenoid w/12V) - good, all sensors read good, etc. All that was negated when I assumed harness was good and tried to run a good PMD off a bad harness extension, since the PMD controls the Fuel Solenoid Shutoff. (Solenoid IS fine, the harness wiring itself is malfunctioning).
I am going to make a new harness tonight. Other solution would be to remove the plunger inside of solenoid since without power it wont retract. Therefore, if wire ever goes out again, the plunger cant return to the default state of down(cutting fuel to pump). I think I am going to do that also as that solenoid cost me a $200 tow to my driveway. Without that solenoid plunger, wont be a concern anymore.
I probed original PMD harness location and then the relocation harness and I was getting the same readings (from left pin to right... 0, 5.0, 12.1, 0, 0, 0.1) so I assumed it was good, especially since I had swapped PMDS in the relocation harness location.
Appreciate the help from you guys. Hopefully this solution is of use to someone in future.