Suburban WP Hemorrhaging

As I was adding Front diff fluid to my 2000 Burb, I noticed coolant flowing over and off the splash pan and the harmonic balancer soaking wet! EFFF me! After getting over the initial shock I checked for WP pricing, but it gives two different applications:

A-1 CARDONE Part # 58562 Reman. Includes Gasket
w/2.05" Diameter Thermostat Outlet

A-1 CARDONE Part # 58626 Reman. Includes Gasket
w/1.88" Diameter Thermostat Outlet

I will have to yank it out and take it to Advance Auto, they have both in stock so I can bring it in to compare. I guess I answered my own Question

This is were your SPID lable comes in handy. The bigger outlet is for HD cooling. Check to see if you have it.