All of a sudden my driver door locks when the truck is running. For example, everything I get out to hook up a trailer while running, only the driver door locks. The other doors remain unlocked. It doesn't matter if the keys are in the truck or on me. It just started doing this after I got it back from the shop last week. Anybody know how to fix it, or do I have to take this thing back for the 15th time?

Thanks