Have anti freeze leak my haynes manual tells me i have coolant pipe is dif name on 1997 Chevrolet 1500 Pickup

It seemed to be coming from head at first but no anti freeze in oil just leakin seems out of the coolant pipe.. is there different name for it. No one can seem to find part

Asked by for the 1997 Chevrolet 1500 Pickup
Napa part # NOE 7304943 See next post!!!