There have been many changes to "Goverment Motors" in the past few years but when I acquired my 46 Two Ton in 2004 I got on the internet and found that GM had a contractor that they had authorized to make available the specs and operators manual of old stovebolts like mine. I got copies sent free! Don't know if you can still do it but give it a try on the General Motors web site.
You can see my truck on the gallery page under George Berry's 46 Two Ton.
GB
