welcome to the garage repo, we like pictures here - one way to tell for sure what you have is visual details
the numbers are CDN, so you won't find much info on the net, except folks here will tell ya the Maple leaf was based on the GMC
I think the 1683 should be a 2.5T w/ 174" w.b.
S/N: 9[year= '49] 1683[model= 2.5T cab/chassis] 00149 - the production sequence number
the rest of the codes will be near impossible to decipher for CDN production
Bill
