Hi, BMT, Send away for the GM Vintage vehicle package ( Canada 1-888-467-6853, Note this # is from 2006). It will tell you all that you want to know. It does cost you money.( $30.00 plus taxes in 2006) Body # 4603 means that is 4603 of how many of that body style they built that year. On your information plate you should find the following, Model#, Serial#, Engine#, Body#, Trim#, Paint#.
