Diesel Bombers - 2005 Cummins No Fuel..

Hello! I am new to this forum and appreciate your help in advance! My story:

I have a 2005 Dodge 2500 Cummins Turbo Diesel Single Cab. I have owned the truck for about 5 months now and it runs like a top.. Until yesterday. So, started the truck in morning, ( fuel guage reading 1/2-1/4 tank), let idle for 10-20 mins, which I normally do got in it, put about 50 miles on it and shut it down. I was at an auction when I shut it down and I parked o n a slight incline (so the rear of the truck was lower than the front). So, I proceeded with the auction and 4-5 hours later, got in the truck and fired up fine. I let warm up again for 5-10 min. Then tried to pull out. I had the truck in 2wd, so I obviously started spinning. No problem, put in 4wd and gave her fuel to get out. It smoked black when I got on it. I pulled up and put in park to talk with a buddy, idling there for 2 mins fine. Got back in backed up, proceeded down the driveway and when I started to accelerate, she bogged down on me and shut off. So I put it back in park and tried starting it up again, lots of cranking but it eventually started. So I proceeded to road, and same thing happened at the end of driveway. Tried starting, nothing this time. Probably a fuel filter I thought. So I ran and got a fuel filter, took old, dirty one out and put new one in. Following a YouTube video, I primed the filter by switching the key on 5 times, tried starting, still nothing. So took filter back out, and discovered no fuel to filter compartment. Then thought, maybe the truck doesn't have any fuel in it! (Even though the guage was reading 1/4-1/2 tank). So I got a rollback, loaded it up and headed to the diesel station. Put about 7-8 gal in truck. And brought it back to the house. I let the truck sit all night, and in the morning, tried to prime the filter again with the new fuel in it. Tried to start and just cranking. No start. Checked filter compartment and yet again no fuel. Bought and replaced fuel pump relay, and same thing: empty fuel canister and no start. Any help is appreciated..