Nope.
For the day GM 1/2 ton 4x4s used 6 bolts.
Blazers were only 1/2 ton.
6 lugs. QED
I have a number of ‘em.
I thought we were talking about light trucks. You are talking about Chevies. But that is what she made, so I suppose you are correct in that regard.
My Fords, and Internationals were all 5 bolt in the light duty versions. The ‘77 Scout 50 feet from where I sit is 5 on 5 1/2.