My driver's door lock only works half the time. All the other doors lock and unlock every time. Doesn't matter whether I use the remote or the inside power lock switch. Manually it seems fine, just like the others. Anyone have any idea where to start?

 

do a search for door lock actuator. thats most probably the problem.

 

I got a couple extra doors, I will try to swap it out tomorrow. Thanks, I will reply if it worked

 

Yeah theyre interchangeable btwn the drivers side or the passenger side. Passenger lock wont work on drivers side and vice versa.

When mine worked intermittently I swapped out the rear til I could replace it. Should work for you as well.