How do you replace a power steering pump on a 1990 Oldsmobile Calais?

To replace the Power Steering pump on a 1990 Oldsmobile Calais, first, disconnect the negative battery terminal and remove the drive belt by loosening the tensioner. Next, detach the power steering lines from the pump, then unbolt the pump from its mounting bracket. Install the new pump by reversing the removal process, ensuring the lines are securely attached and the drive belt is properly tensioned before reconnecting the battery. Finally, fill the power steering reservoir with the appropriate fluid and check for leaks.