How do you replace the power steering pump on a 1997 astro van?

To replace the Power Steering pump on a 1997 Astro Van, first, disconnect the negative battery terminal and remove the drive belt by loosening the tensioner. Then, detach the pump by removing the bolts that secure it to the mounting bracket, and disconnect the power steering lines, being careful to catch any fluid. Install the new pump by reversing the steps, ensuring all connections are secure, and refill the power steering fluid before testing the system. Finally, check for leaks and bleed the system as necessary.