Glad you pointed that tool out! Auto Zone had that on the rental list too, so I picked one up last night. Bad news is that I spent over an hour this morning JUST trying to get a good angle on the compressor clutch to get the clutch'* center nut removed. Every centimeter of movement on the nut was like trying to move a seated elephant with toothpick (i.e. barely moving)! The threads were apparently so rusty that I eventually gave up for fear I would snap something in two and really be in a bad spot. I used PB Blaster and a wire brush as far in as it would go, but it didn't seem to accomplish much.
I put everything back together and drove the LeSabre to work today. The clutch noise is gone now anyway, so I'll see if/when it returns (and will keep watching for more new metal shavings, as I cleaned up the others) and go from there. Maybe I can find a shop that will just back out the clutch plate a few millimeters and see how that goes, if it ever ends up being needed.
Current GMs: '95 Chevy Suburban C2500, '69 Pontiac Executive
Former GMs: '83 Buick Park Ave, '73 Buick Electra, '92 Chevy Caprice 9C1, '98 Pontiac Bonneville SLE, '99 Olds Aurora, '00 Buick LeSabre