Thanks Bill & Dan!
I have the reprint of the 1948-1953 Chev. Truck Shop Manual.
Try fax on auto ,they have decent prices also check locally kijjiji of Facebook marketplace.I did the same thing you can also buy the Chevrolet book as your gmc is labeled different but will match up to one of the chev models like my gmc 9300 is 1300 chev.
Kevinski, is that a misspell, GMC 9300 is CHEV 1300 (should be 3100or not?).
By that, my 9436 would be equivalent to a Chev. 3800 or 3942, depending on the rear springs and I have to check that.
