i have a 1995 6.5 turbo desile chevy half ton we have only had the truck about a year and half and in the last couple monthes we have had an over heating problem,my husband has changed the theromastate,waterpump,clutchfan, and we still have the over haeting the temp stays at 210 and over unless the mortor is idaling not sur what to think any answer would be a great help

 

have you cleaned the radaditor. duramax fan moves more air too

 

Radiator could be plugged , and the Duramax fan does move more air . Have you tried a new temp sensor . Also that truck wont last long running at 210 degree temps . Could be the start of a head gasket going bad

 

i had the same problem, it ended up being my radiator, had three tiny holes above the drain plug. it could be a faulty rad. cap

 

Yes, radiator is likely plugged between the radiator and the AC condensor. Should remove the radiator and clean thoroughly with scrubbing bubbles and a hose.

Good luck!