Yup! Dad had a four drawer heavy duty filing cabinet, that he kept most of the shop manuals in. 50s, 60s, 70s GM stuff. I've sold a few but still have some. Back in the day, Chevy had a "service manual" for most repairs, an "overhaul manual" for rebuilding components, and a Fisher Body manual for body and some interior stuff.
My '99 Burb has the set of four books (I'm missing #4) ; I think '98 was the first year of four books. Rawhide, being a '97, only requires two books (as pictured) and a separate transmission manual. I know these are on the forum in digital format but I am old school enough to want a paper manual in front of me when I tackle a new job....
Part of the reason why there are so many more pages, is there are a LOT of diagnostic sections, and so much more computer controls and sensors, the newer you get. We looked at getting the set of books for the 2006 Denali... until we saw they were over $300 for six volumes.