After multiple tests come to find out its was my New FUEL Pump. Got it online so I have to wait till another arrives. HOW CAN I TEST NEW FUEL PUMP BEFORE INSTALLATION????
The previous one we did a bench and ohm tested and it worked. Don't want this to happen again. I know fuel has to be present to cool down pump, BUT WHAT OTHER METHOD CAN
I USE TO TEST IT OUT. ??? HELP

 

GOT IT !!! I want to thank everyone for their input. This helped me to re-focus on my testing plus cost me approx $350 vs Dealership? These included tow, $104 new pump, broken pressure sw on gas tank $74, two new relays $26 and siphon hose $6.99. To be HONEST, don't know what was the culprit. This is what I did, replace two new relays PCM and Fuel Pump, cleaned PCM pins had small spider web & dust on bottom pins, new fuel pump and tested for voltage and voltage drop over & over again.
At first no pressure from pump, I also notice on both relays the center pin # 87a had burnt
residue, but both relays clicked when checked. After cleaning pins I started getting voltage
to pins #87 and #86. After an exhausting testing decided to replace both relays and for sure the pump. I started to get the proper voltage at the inertia sw and down to the fuel pump.
After completing installation I was nervous to turn key on, but started like a CHAMP!!
Thanks again to everyone. Truck has been down since Dec 4th.