How do you change a water pump and on 2002 pontiac grand am gt?

someone told me my water pump may be going out and it sounds like their is a loose barron inside of it, so how much is it and and if i was to have someone else to fix it how much will it cost meHow do you change a water pump and on 2002 pontiac grand am gt?
This should be a V6 engine correct. if looking at front of engine,toward the belt , the water pump is located behind pulley appox. 5 inches on the side toward radiator. highest pulley on right side of engine. Replacement can be performed easily without many special tools.. First loosens each of the pulley bolts on pump. Then release tension on belt and route away from pulley. Remove remaining pulley bolts and pulley , Water pump has 5 bolts holding it to cover assembly, Mark-index the way pump installs and remove. Clean all gasket material. Install new pump and gasket, refill system and to open air blled on cooler pipe near water pump to allow air to escape.How do you change a water pump and on 2002 pontiac grand am gt?
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