Its your door lock acutator. Its a common problem. The price ranges from $200-250. I found one on ebay new for 40 shipped but I got lucky. You have to take the door panel off. Dont forget theres a screw behind the door open lever. Disconnect electircs I think there were 2, one for the door light and one for the window/door lock. It takes about an 1hr. Tools? I think it was just falt n philps screw drivers and a socket wrench. You do have to by a new tool its a * almost like an allen but its a star. I picked it up at autozone for a couple of bucks( just get the full set cant remember the size, sorry)
Good luck
Thanks for the feedback.