If GMC Canada used the same numbers as my 49 chev 1/2 ton , Trim # 394= brown leatherette interior, Body # 1827 of how many they built that year, Paint # 331 is the colour, I do not know what colour that is. Go to red58 and click on the GM Canada vintage site and send in your information, pay the money and if nothing else find out its birthday and the name of the colour. Have fun, Brian
