[justcuz]

That makes 4!
All our g80's blew!
To be fair all of ours had over 200,000 miles on them.
When I can (which will be this one for the Blazer) I remove the flyweight mechanism and add extra frictions and shims to make it a tighter LSD.
When I do the Blazer rear axle, I will do a thread.
It's pretty simple though. You just add frictions and shims till the side gears and pinion gears fit tightly. Then install the axles and C clips and the center pin and your done.
Jeremy,
I forgot to mention that a guy on Pirate is doing a SAS on a Yukon diesel. Same exterior color combo as yours. He installed an 11.5 diesel rear axle and a Ford Dana 60 front. It looks pretty nice. I wonder if the diesel versions were more rare than the 5 speeds.
Rumor has it the diesels came with the 14 bolt semi-float and a 4L80 transmission.
Either way these Yukons and Blazers are getting pretty rare.
I have half a notion to get rid of my 2 single cab pickups and keep my daughters Blazer.
I have a trailer to do truck hauling stuff and I would rather have a crew cab pickup.