02 gmc 2500, How do I get the fan/fan clutch off the water pump?

The fan clutch is bolted to the water pump with four bolts, and the fan itself bolts to the clutch with four bolts. The easiest is to unbolt the fan clutch from the water pump since the fan may not clear the shroud. Once the four bolts are removed from the water pump the fan should drop down, and you should be able to wiggle it up and out. If not then remove the shroud which should have two bolts on each side. Remove the fan from the clutch, bolt the new clutch on, and do the reverse of removal. Depending on accessories you may have to remove the upper radiator hose but normally you can wiggle the unit out. Do not remove the pulley since this will only add extra work and frustration.

change fan clutch

drain coolant, remove drivebelt, remove upper fan shroud, remove cooling fan and clutch assemblyremove water pump drive pulley mounting bolts, remove upper hose from the water pump, remove water pump mounting bolts, remove water pump from the engine, remove gasket, and make sure that all mating surface are clean and free of gasket materials or burrs

You will have to take the fan and fan clutch off to get to the water pump. It is best to go to oriellys and put a deposit on the fan removal tool it will be easier on you. Than there is only four bolt holding the water on.

If it has the big nut on the shaft screwed into the pump connecting the fan clutch,then there is a fan clutch tool for this at the auto parts store

First remove the fan from the clutch. There should be four to six bolts holding the fan to the clutch. The clutch is held on to the pump with four bolts. remove the four bolts to remove the clutch. I've included a pic of the pump to indicate the four mounting holes. Not sure if the link will work.

http://www.1aauto.com/scripts/view_full_image.php?image_url=http://images.1aauto.com/EWP/1AEWP00011.jpg&description_id=1090439

Just guessing but, I'd say either fan clutch is going bad, not turning as fast as it should be once temps go up or if you have electric fans, either fans or relays bad. I'm leaning more toward the fan clutch. The fins on the impeller of the waterpump can also wear done over time and reduce the amount of water flow.You may also want to make sure the fins in the radiator are clean and not stopping air flow. I'm assuming that when you're moving there's no problem so that should say that water pump, thermostat are doing good. Please rate this. Thanks

Before you remove the serp belt, loosen the clutch fan bolts from the water pump. Other wise you will be fighting with them later. Other wise just drain the coolant and remove the pump. I would suggest a new thermostat since the coolant is drained. Make sure the block surface is cleaned of all gasket material and other dirt before installing your new pump. I usually scrape the area with a putty knife and wipe it down with some brake clean on a rag.

There is a resistor attached to the blower box. Replace the blower resistor and this should solve your problem

Have they checked to see if the clutch fan is working properly and water pump?