97 Silverado power steering pump

what is a good replacement of P.S.P. to use? I just replaced my original pump with one of the same year, and it now leaks. should i replace it with
a different year?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.