The GMC AD grill was not bolted directly to the frame. Yes, most of the differences were cosmetic with the exception of the motor. However, GMC buyers were very happy being fed the illusion that the trucks were sturdier.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!