Hi Bob!
Greg's got you on the right track. GM vintage dept. is a good resource. My belief has always been that Maple Leafs were a 'heavier duty' truck and usually came at 2 tons or over. I have some info for 1936 Chev's, Maple Leafs and GMC's. The Maple Leaf's show 2 and 21/2 tons but nothing smaller, even gong back to 1932 in the info I have.
cheers, George