Chevy door locks

It may be a body module problem. There is three relays in the drivers door lock switch. 2 control all doorsunlock andlock relays they can be screwed up or the other one. Ifit's not that then it may be teh body module. There is also a ground on the left side of hte engine compartment check to make sure that it's clean and tight. That may be the first one to check as it may be making ground then not especially if you go down a bumpy road.