so i just recently picked up a 06 2500 5.9 6speed mega cab 130k miles
it said it runs and drives but when it got delivered
batteries where both 0%
it has been sitting for around 3months

charged them up
checked all fuses
no error codes or check engine light
had the block heater on too
engine started once for a quick second the spluttered out and died cranks really good but now the batteries are dead again charging over night

charged them both to 100%
cranks good
noticed no fuel was getting delivered into the fuel filter
so got thought of course the fuel pump went out

took the bed off and accesses the fuel pump pulled it out noticed one of the spring and rods was just at bottom of tank
put that back together how them up to a power source and it works and pumps fuel even tried to have it pump with a battery why'll i cranked it too see if it would start it did not

so there's no power to the fuel pump
everything looks intact

im so confused what to do, don't have the money to pay someone or know anyone/good places


was relying on the truck running and driving and i can't even get it to start
thanks for reading this any input will help