How do you change a water pump on a 2004 Chevy Colorado?

To change the water pump on a 2004 Chevy Colorado, start by disconnecting the battery and draining the coolant. Remove the serpentine belt and any components obstructing access to the water pump, such as the fan shroud. Unbolt the water pump from the engine block, clean the gasket surface, then install the new pump with a new gasket, reassemble the components, and refill the coolant. Finally, reconnect the battery and check for leaks.