Eric,
Have you used the Dupont Historical Color Library?
I could not find very much information there on GM trucks (no 1950 and no distinction for Canadian).
Also, it might just be my browser, but even when they show info for year, the years I looked at only had one page per year. For example, for 1951/52 and 1957, only one sheet of chips displayed.
Maybe I'm at the wrong
Dupont Historical Color Library Site ?
Tim
