Hy fireguyfire, welcome, your serial number breaks down as follows 1 year, as Canadian Chevrolets only used one digit to identify the year of production we must verify by body design, you say yours appears to be from the forties so 1941. 1533 is the model number (part of the serial number) this identifies a 2 ton chassis with cab with a wheelbase of 134 1/2" the balance of the serial number is the regular production number which identifies that particular truck. Your truck left the factory with an engine that has been largely forgotten a 224 cubic inch inline six cylinder Chevrolet engine which has a 1/16" larger bore than the more well known Chevrolet 216, hope that helps.
