Originally Posted by tmajor
Going back, to what you have found/tried: Since the manual lock buttons seem to work normally, it would seem that the RF signal from the remote isn't doing it's thing for the left door. ?? If that's indeed the case, that would put the problem out of the door itself.
When I say manual, I mean pressing the door lock down with my finger and unlocking it from the outside of the truck with the key. Not using the lock/unlock switch on the drivers side. That switch does work for all doors except the drivers side.