How do you change water pump on a 2001 Toyota Sequoia?

To change the water pump on a 2001 Toyota Sequoia, first disconnect the battery and drain the coolant. Remove the serpentine belt and the timing belt (if applicable) to access the water pump. Unbolt the water pump from the engine block, clean the mating surfaces, and install the new pump with a new gasket. Finally, reassemble everything in reverse order, refill the coolant, and check for leaks.