Found a pdf of the Canadian 1954 truck paints online Tried attaching it here, hope it worked
There is 4-31 which is in theory the same as 831 would have been in previous years but exact shades could likely change over time.
Edit: by 1954 some Canada paint codes definitely changed because in 1951 code 36 was black and by 1954 it became Rideau Maroon So don’t take any paint codes as factual truth unless we find it explicitly for that year in a gmc document -s
