Ram diesel question

Hi guys. Quick question about my truck. 2011 ram 3500 Cummins 6.7. Truck stalled out a few times on me. Let it sit for 30-60 seconds,put it in park and crank and she fired back up. I quit driving it after the 3rd time it happened. Needed to move it so I started it up and it stalled. Let it sit and same thing. Fires back up. Went to move it again and now it won’t start. Changed fuel filter. Tried to get it to prime up but I’m not getting any fuel to the filter canister. Also when I open the drain I don’t get much pressure if any at all. I can hear the lift pump engage in the tank when I turn ignition to on but like I said,no fuel to filter housing. Seems to me I should be getting fuel and some pressure.Ive switched to on and then cranked for 4-5 seconds 3-4 times numerous times. Btw,there’s no Schrader valve that I’ve seen to actually check the pressure. So what do you guys think? Am I dropping the tank or am I missing something?

Tank breather vent clear?

^^^x2 definitely check the tank vents.

On my 3.9 4bt, if I don't prefill the fuel filter she won't start without alot of cranking, bad for injectors so I avoid it. The hand primer on the lift pump isn't worth a darn. Not sure how that translates to your 6.7 but you might need to bleed the injectors to get fuel flowing.

Never gave it a thought. I’ll check. Thanks guys

Turn the switch on and let the pump run for a while without cranking it over, after a few times it should build pressure and the pump cut off.

If he isn't getting air somewhere that should work.