wow! picture posting allowed now!?
pfarber - any military vehicles were built to general govt specs by all companies, and Harrison supplied parts to all companies, no reason GM Heritage should supply information kits for military vehicles - GM will tell you there was no 42-45 civilian Chevrolets because any sold in those years were ID numbered continuously from 42, so effectively they're all 42's, no physical differences, and the basic parts of the military trucks those years are pretty much the same as the civilian trucks .... heaters weren't standard issue in the 40's so you'd have to find some accessory phamplets
Bill
Only one company built G506 and G508 (1.5 ton and 2.5 ton trucks) and that was GM and GMC, respectively. The early 1.5 ton trucks had 'Cheverlot' stamped on the engine side panels and until 1943 the GMC 2.5 ton trucks sported a GMC placard on the grill.
The original motors were still painted GM gray and GMC olive when installed in the otherwise Olive Drab chassis.
Its not like the jeep where there was a Willy's and Ford model. GM and GMC did the entire run, in house. Yet to ask them if they even exists is simply not going to even be answered. Really.