You don't have to remove the fan. Remove the washer bottle and the overflow bottle to get room to work. Drain the radiator and remove the hoses first. The lower one is a PITA. Just remove the screws in the fan shroud and move it toward the engine. Remove the screws that fasten the radiator and lift it out. The bottom may stick a little bit but it is just a couple of pins in rubber bushings. That's the way it is for my '95. You didn't say what year your truck is.