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So my drivers side window makes noise when rolling it down and the drivers door lock doesn't go down when you lock it with the power locks. Not the biggest deal but I don't want the window to break when it's rolled down in the snow some time and it would be nice to be able to lock the car fully with the keyless remote. I'm guessing moisture has gotten in their and mucked things up. I'm thinking of taking the door apart, but I was just curious if this is a common problem and how much effort it will take to fix it.
It sounds like your door lock actuator is going bad. You might be lucky and it might just need to be lubed. Either way you will probably have to pull the door panel off. I would also lube the window tracks while you are there.