Here's an incomplete list of G.M.C. identification numbers of the 1940'S & 1950'S

1)100: Half-Ton.
2)101: Half-Ton Short Wheelbase.
3)102: Half-Ton Medium Wheelbase.
4)150: Three-Quarter Ton
5)152: Three-Quarter Ton Long Wheelbase.
6)153: Three-Quarter Ton Forward. Control Long Wheelbase.
7)250: One Ton.
8)251: One Ton Short Wheelbase Cab & Chassis.
9)252: One Ton Medium Wheelbase Cab & Chassis.
10)253: One Ton Long Wheelbase
11)280: One-and-a-Quarter Ton.
12)300: One-and-a-Half Ton.
13)350: Two Ton.
14)370:
15)374: Flatbed(I don't know much else).
16)450: Two-and-a-Half Ton(?)
17)470:
18)500: Five Ton
19)550:
20)600:
21)620:
22)630: Fire Engine.
23)640:
24)650:
25)660:
26)662: Tractor(?)
27)670: Tamdem-Axle.
27)720:
28)740:
29)750:
30)800:
31)860:
32)890:
33)940:
34)950:
35)974:


A lot of incomplete stuff. Is anybody able or willing to fill in the blanks?