Heres whats going on. I lost the keyfob and keys to my truck so I have to manually lock the doors using the switch. When i lock the doors, and close the last door. All driver door unlocks on its own. I can lock it 100 times, and 100 times it will unlock when i close the door. Any ideas.

 

I think that's to prevent people from locking themselves out, but it only do that when the engine is running. Might have to just manually lock it with the key.

 

I would say either your ignition switch is reading that the key is still turned to the on position. Or your lost fob is in the truck somewhere