I Have a 1995 Chevy C3500HD with the 6.5 Should I Be Running Dex-Cool, or should I be running regualr green Antifreeze?

Any help would be appreciated, thanks

Supposed to be dex-cool but that stuff is garbage and i see all the time partially clogged heater cores from it. I would go to green but make sure you acid flush the whole system and flush well before going to green.

I believe that GM started using Dex-Cool in 1995.
Here's a useful chart.....http://www.peakantifreeze.com/referencechart.html