2010 f350 6.4 diesel

May be a dumb question, have you tried locking and unlocking with the other key fob? Maybe the alarm is freaking out

I haven't tried that. Would that cause it to just shut off while running and lose power to everything?

Not sure what kind of alarm it has in it. When you say no light so you mean no dash lights? Does the door chin come on with the head lights on and the door open?

Its just the factory alarm. And I mean it's completely dead. No headlights, dome light, dash lights, tail lights, nada. Turning the key and nothing happens. No clicking or anything. It started perfectly normal and then just randomly shut off a minute or two later and is dead in the water. And the drivers side power step dropped down, but not the passenger one(not sure if that's relevant or not)

Seems weird. I would think if the alternator was bad the batteries would last for more then two minutes. Your probably gonna have to find a good desire mechanic. Google has a bunch of questions regarding the remote start on those. Could be your problem

Thank you for your help!