Well, with the hot weather I decided its time to take a look at the no-AC issue. Have power to the compressor clutch, and if I prod it a bit while running I can feel it starting to grab, but sounds like a coffee can full of nickels, and there are lots of metal shavings accumulated on the rim of the clutch.
Is the clutch accessible without removing the entire compressor? I'm hoping to just find a donor clutch and swap them without having to evacuate and refill the system.
Thanks!

Here'* a write up. https://www.gmforum.com/mechanical-134/adjust-ac-clutch-plate-278951/ You should be able to unbolt the compressor and move it over to the side a bit to adjust the clutch.

Just what I needed, thanks!

Looking online for the clutch tool, seems NAPA is the only local supplier with stock on hand.
They show 2 different tools, one metric, one SAE.

Which tool is required? I'd assume the metric if the center bolt is metric, but I don't want to have to make another 30mi trip into town.

Also, is the hub holder tool required, or is there an easy way to lock the hub in place?
Thanks!

My puller does not say metric or standard. I can only assume it'* metric. The bolt head on the puller is 19mm. Most things on our engines are metric.

Thanks again!