to find the answer to your question, you need to locate RPO code sticker. RPO stands for "regular production option" The RPO codes are 3 digit combinations of letters and numbers like "zz4 or z71" The RPO sticker is usually located in the glove compartment, on the inside of the trunk lid, or under the rear seat. Copy down the codes on the sticker and do a google search for "GM RPO codes" You should be able to find the charts that list what the RPO codes are. This will enable you to find exactly which wheels, engine, transmission, interior trim, etc. your car originally came with.
Either were available depending on equipment ordered and style of the Buick.
seth722 is talking about a build sheet also known as a line sheet. check in your doors, seats, or anywhere totally hidden. yes, it is in code. if you find that, then it will tell you everything you need to know. i used to work for a chevy dealer in 95. good luck with the hunt.
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