Originally Posted by JeffL
The only major diffence that I know of is that GMC had metal bed floor and Chevy had a wood floor.
That was on the 41-46's Im not sure on the later years.

You're right on this, but the canadian made 41-46 GMC's also had the wood floor, and did not have GMC on the tailgate.

1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket