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Changing a water pump on a 2005 GMC Pick-up

How do you go about changing a water pump on a 2005 GMC Sierra pick-up, with a 4.8L motor?

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Open the hood of your truck. Look inside the engine bay. See the fan assembly and the pulley that the belt rides on. The water pump is behind the pulley. Changing water pumps can be somewhat of a task. Professional help will be needed for someone that can't find the waterpump. 


 The water pump is on the passenger side front of the engine; I had to drain the coolant, I kept the belt in place, then I removed the 3 bolts from the pulley to give me access to the bolts on the top (it will require a set of metric tools for it). Then I removed the passenger side front tire and the splash cover from under the car just above the tire, removed all bolts that holds the pump on the lower part of it, then removed the belt, scraped and clean very well the old gasket. The new water pump came with a new gasket, so I just got a gasket maker and applied to the gasket, so I did not have to do it again. Work backwords to reinstall everything, good time to replace the coolant and if you have not done yet, replace the thermostat valve along with any hose that may be cracked, rigid or enlarged (check the hoses to the heater core also). Please check your belts and hoses so you will not have to redo the process again. 


Posted on Jan 29, 2009

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