That Yukon rear is going be too wide, and I question the listing if they have it listed as a "12 bolt", as they never used 12 bolts in the Yukon. The Yukons, and pretty much all 1/2 ton GM trucks after '77 have 10 bolt rears.
On the mention of the broken pin bolt, that's actually a very common problem. I've seen them broken from the factory.
I double checked the post and you're right. It does not day it is a 12 bolt. He measured it at 59.5..
