The door lock actuator is actually assembled to the door latch mechanism in the door. I just changed my drivers door latch mechanism so i can speak from experience
Order the actuator and 6 door panels fasteners (clips) The clips have a tendency to break, not all but do not take a chance. I used the new ones and saved the surviving old ones for a rainy day
Go to
http://www.carstereohelp.com and see the instructions for replacing the door speakers. Very good and detailed instructions to remove panel. Do this with the window up. Be careful pulling back the plastic sheet liner. You should only need to remove half way. The black goop is reusable so do not remove.
Take a few digital pics or sketch how the mechanism looks fully assembled. This way you know exactly where to put everything back
In order to remove the actuator you will need to remove the latch and actuator as one, Impossible to get to screws holding actuator to latch mechanism.
Remove the arms being careful not to break the holders. They rotate to release the rod. Remove the three screws holding the latch mechanism and the two screws holding the assembly. You will need to unplug the actuator. It takes a little work to get the assmebly out of the door.
I had to remove the bottom window track screw to allow the track to move enought to get the mechanism out. Mark the position of the screw before removeing so it can be reassemble in the exact location. Prevents track misalignment
After that it is very straight forward. Two phillips screws hold the actuator to the latch.
Took me about 1 hour total to do this job from start to finish
I think the actuator is around $60 somthing from Scottsdale
good luck