Red 85 GMC stepside

Hello I am new to this forum / site. I purchased a 1985 GMC short bed step side wood bed 4wd pickup (bright Apple Red in Sierra Classic trim level) this week. I love it so far. We had a new 1979 Jimmy many years ago but driving this new pickup is much the same as chassis is effectively the same. By 1985, most trucks I believe were fleet side. When I was growing up in 1960's in my grandfather's GMC dealership, many trucks, if not most, were step side. Fleet side was a new concept in the 60's. I am trying to search out production numbers by model for 1985 to see how many step