if you can hit the key fob or the master lock/unlock and put your ear to the door, you'll probably be able to hear the actuator make a clunk or clicking noise, if you can hear it then i would assume the fuse is fine and you're getting power to the actuator. the actuator may need adjustment though, so it might be worth looking at it before ordering a new one, but actuator motor failure is pretty common in these trucks.
killa rover was right in saying to look on ebay for a used one. i bought mine form british parts of utah parts for 115$. i'm not sure if it was new or used, but it's been working great for two years. 115 seems kinda cheap for a new one.
be prepared for a 2 hour or so job. it involves pulling out the window frame, window, taking off the mirror etc.... definitely consult a manual or the rave while doing it, there are a couple of tricky steps.
when you take the interior door panel off try to use a panel popper, the plastic fasteners tend to break very easily or tear through the panels backing board. after you get the panel off you'll encounter a plastic moisture barrier, don't cut this if you can help it. if you're careful you can separate it at the black rubberized mastic seal and once you're all finished you should be able to use the same seal to place the plastic back. just use some masking tape to fold it out of the way while you work.
while you're in there, inspect the window regulator operation. inspect the white plastic wheels in the track as they may be cracked or broken and the window regulator may need to be replaced. also inspect your speakers, especially the 3" in the top of the panel, it's more than likely blown if it's a harmon and kardon. i also have bought used speakers, window regulators and window motors, it's so much cheaper that way.
when i installed mine i paid close attention to the markings of the old bolts that held the actuator in place, there is a bit of room for adjustment, so if it's not correctly lined you won't get a smooth open and close action.
here's a post before i did my own fix, it may have a few helpful hints.
window regulator and lock actuatoe motor