Radiator fan constantly running. 1998 GMC K1500 Suburban Vortec 5.7

[Macs Garage]

Sounds like you figured it out,but if it is roaring all the time- the clutch is bad.

 

[udidwht]

The clutch fan should not freewheel when the engine is cold. If it does it's shot and needs replacing. With engine cold the clutch fan should have resistance when trying to fling by hand.