I have a 2005 ram 3500 5.9 ran perfectly fine up to the day I parked it let it sit for a few months as I drive tractor trailer went to start and all I get is fass fuel pump.

no gauges at all and no crank I have no clue as to the problem can someone help?

What voltage are your batteries at?

Hi my batteries are at 12.79 v

Do you get any lights in the cab when you key on?  

 

Does it seem like the truck has power?

Hello and my radio come alive but no sound my heater blower works my wipers work my headlights come on but absolutely no response to my gauges or starter ?

Truck seems to have power but no idiot lights at all dash is blank and only mileage comes on when door opened ?

Does it click when you try to start? 

 

I would check and recheck the fuses.  

No click and replaced all fuses

I almost wonder if your lock cylinder is the issue?  Seems like the truck doesn't know when you are turning the key.  

 

I however have never messed with this myself so I have no idea where to take it from there.

Check the lock cylinder and the the horseshoe piece all functioning well?

seems if I don't figure this out it's gonna cost the same as a new truck lol!