The first 1.5 GMC produced right after the war had the front fenders trimmed like this one to conserve steel.

https://plus.google.com/u/1/photos/...15476823813272450?icm=false&iso=true

Trucks produced right before the war had more metal in the front of them like the one on the middle. It is a 1941 Mode.

https://plus.google.com/u/0/photos/.../6192000007349452385/6192000061091222818