New member - lost for information

Its 10 digits - starts with 55A - thats the sales order???
I don't know what is stamped on your core support (post a pic if you can), but the VIN of your car should start with "L35". Now if, at some point, someone has received a replacement VIN number (due to lost title, etc.), then the cars VIN could be anything.

Is there a tag on the drivers lower door hinge post? If so, that is your cars VIN.