How do you change power steering pump on 1999 sienna?

To change the Power Steering pump on a 1999 Toyota Sienna, first, disconnect the negative battery cable and remove the serpentine belt. Next, locate the power steering pump, and disconnect the fluid lines and electrical connector. Remove the mounting bolts to take out the old pump, then install the new pump by reversing the process, ensuring all connections are secure. Finally, refill the power steering fluid and bleed the system of air before reconnecting the battery.