Join Date: Aug 2002
Location: Brandon, Florida
Where was the car built? Does it have the buck tag under the hood? The interior code should be on that too.
Not all of the plants bothered with the buck tag, so it may or may not be there, but if it is then you can use that to get what you need. If your car has one it'll be just screwed into the top of the fender under the hood back by the driver's side hinge.
You could also try digging around the interior to find the build sheet, but that's another thing that some plants did and some didn't so you might never find one.