Looking at the part in Rockauto, says:
"It Is Necessary To Remove The Timing Cover And Exhaust Manifold Assemblies To Replace This Pump. These gaskets will need to be replaced And Are Not Included With This Pump."
https://www.rockauto.com/en/catalog/chevrolet,2000,cavalier,2.4l+l4,1358568,cooling+system,water+pump,2208