My aren't we hostile.
Up untill 1991 Suburbans and Blazers had solid front axles.
So since he has a 1990 3/4 ton Suburban that would mean that it has a corporate 10 bolt axle. Either 6 or 8 lug.
He also stated that he has autolocking hubs, which would be a solid front axle.
Which indicates that it would have axleshfts not half shafts.