I have a 2000 express van 3500 15 passenger start van up could be driving down road and all the doors will lock them selfs replaced main switch don't see any broken wires any where anyone else have this problem ?

 

I don't have a van, but the doors lock themselves in my 13 Silverado when I start driving. My 99 Silverado also did it. It is supposed to be that way.

 

the doors lock when sitting or driving down the road yes some cars/trucks do that when put in gear but this is a 2000 it don't have that option and when you try to unlock they won't with the unlock/lock button i changed the button