How do you change a water pump in a 1984 Cadillac biarritz?

To change the water pump in a 1984 Cadillac Biarritz, first disconnect the negative battery cable and drain the coolant. Remove the serpentine belt, then unbolt the water pump from the engine block, taking care to remove any attached hoses. Clean the mating surfaces, install a new gasket, and position the new water pump, securing it with bolts. Finally, reattach the hoses, serpentine belt, refill the coolant, and reconnect the battery.