Dennis i have a 00 sd v-10. i had to replace the lock actuators on my truck last year one wouldnt work at all. i changed them all out to be on safe side , you need to get the actuators from the dealer so they match up, i looked at some aftermarket actuators but they did not match up.. you need to pull the door panel off to get to it the old one snaps out you plug the new one in and plug it in. i think it is located next to the latch on the door -- match up the left side and the right side-- the switches are made for the left and right sides. hope this helps--good luck - britt