By replacing your stock clutch fan with an electric fan you gain back all the HP your motor had to use to turn the clutch fan. This could be anywhere from 5 to 10 HP. Removing the clutch fan on a 96 and up full-size is different then the older trucks. The older trucks had 4 bolts that held the water pump pulley and the fan. On the newer trucks 4 bolts still holds the water pump pulley but the water pump has a big stud the comes through the center of the pulley that the fan screws onto. To take the fan off all you need is a big wrench or channel locks and a hammer. Placing the wrench over the fan nut you can hit it with a hammer to loosen it. This process of hitting a wrench with a hammer is sometimes called a redneck impact wrench. After hitting the wrench/channel locks and breaking the nut free the fan will screw off. Note that you do not need to pull off the belt because that is what holds the water pump from turning. The top of the fan shroud does however need to be removed. Once the fan shroud and the stock fan has been removed the new electric fan(s) can be mounted in the same location as the stock fan. The fan(s) sits flush with the radiator and uses a type of zip tie or mounts to hold it to the radiator. Once the fan(s) has been mounted the wiring can be ran. Some fans will allow you enough room that you can reinstall your fan shroud. The fans need to come on at a desired temp and also come on when the AC compressor comes on. You could even give the fans a over-ride switch that you can turn the fans on manually.