I don't think there is a 36 GMC high cab. My 36 GMC only has wood in and below the door pillar where the door hinges attach. I put shoulder belts in a 46 GMC which is essentially the same cab. I welded in 3/16" steel between cab supports and the rear of the door frame behind the sheet metal in the rear corners.
There’s not. I was speaking of the Chevy cabs. I had assumed that’s what the original poster was speaking of. Looking at his profile now, I see he has a GMC.
