How do you replace the water pump on a 2006 3.6 liter Cadillac CTS?

To replace the water pump on a 2006 3.6-liter Cadillac CTS, begin by disconnecting the negative battery cable and draining the coolant. Remove the serpentine belt, then take off the front cover and any necessary components obstructing access to the water pump, such as the intake manifold or other hoses. Unbolt the old water pump, clean the mounting surface, and install the new pump with a new gasket. Finally, reassemble everything, refill the coolant, and check for leaks.