New purchase
Try and check the SPID label and you can see the options.
As a reference the corvette black book has a lot of information on each year and has the option codes.
Another good source is the corvette action center. Try and look around on their site and it can give a lot of information about your car and is organized by model year. I put a link to their site below for the page that has the '91 options listed.
http://www.corvetteactioncenter.com/...91/91prod.html








