I'm looking for some details and differences in the various 48-54 GMC maintenance manuals, particularly the wiring diagrams, if any difference.

I have what I thought was the right manual for my 51, it's a reprint (was listed as an original when I bought it) and "covers" 47-54 and models 100-400.
This is not where I bought it but it is the same manual
http://www.faxonautoliterature.com/...00-Repair-Shop-Manual-Reprint-P9815.aspx
They describe the manual:
Quote
This is the book GMC originally used to repair 1953 and 1954 models. It can be helpful for 1947-1952 models also

In my searching I see that GMC did offer a manual to cover the 1951/52 model trucks size 100-350, this is the exact manual that covers my particular GMC.
Here is a reprint, originals can also be found, they have "X-5111" in the upper right corner of the cover.
http://www.faxonautoliterature.com/...k-Repair-Shop-Manual-Reprint-P25248.aspx

I'll probably find and buy one of these originals in time.

Until then does anyone have this GMC 1951-1952 only manual and can you show me the wiring diagrams so I can compare to the diagrams in the 1953-1954 manual (the manual now sold as 47-54)?

Thanks,
Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-