Antifreeze Leak

[warrens2500hd]

i have a 2005 gmc 2500hd duramax and just recently i have noticed that i am leaking antifreeze somewhere extreamly noticable smell outside of the truck so i know that my heater coil isnt going out. however i am very nitpicky bout a clean engine so i have not found any leaks that are visible no dripping no little steam drips im quite baffled by it has anybody had a similar problem?

 

 

hey thanks anyway seen where several people have looked at this but i spent about a hour today looking over the engine bay let the truck get to operating temp and i looked everywhere i could possibly think. i started smelling te antireez and noticed it was coming strong from where the clutch fan was blowing so i figured i would take a look at the water pump sure enough thats the problem from the best i can tell every once in a while i could see dexcool dripping from the bottom. thanks for looking and possibly trying to help.