Uh, trick question? <g>

Remove the fan blades first.

Two styles, but similar: remove the nut (or four nuts, as appropriate)
and it pulls right off. There is a 'post' in the center of the
waterpump shaft (actually the saft extends into the clutch) that may
be sticking some.

Don't hit, heat, bang the clutch.

Clutches are not that expensive (under $100, Jegs and Northern Auto
both stock them) so you could just replace it...

There is nothing magic in that area, that I  know of.

Note: I've not done a 98 before, but have done many GM cllutch fans in
teh past.

Ummm  use 2 wrenches?

I use one wrench to hold a bolt while undoing the other 3.  I then use
the same wrench on one I just broke loose and let it tighten some as I
get the last one.  The one used to hold will now come loose the second
time easy.

Or I back one bolt out enough if long enough to jam a large screwdriver
under it to hold it for the last bolt.

If it is a single bolt, you can try an oil filter wrench or chain vise
grips to hold it.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's