I've never figured out why they have to have your VIN. I've gotten 3 different packets, and here's their contents:
1) A photocopy of the truck specification sheets for that year. This includes wheel bases, weights, and all kinds of stuff for EVERY truck of your year, broken down by model. It also includes all the RPOs, etc. This is NOT VIN specific, but year specific.
2) A photocopy of an outdated list of suppliers. This is IDENTICAL in every packet that I've gotten -- not even year specific.
Frankly, most of the information is available in the factory repair manual. I wasn't terribly impressed.
Oh, and Peggy, the Cadillac and La Salle Owners Club is reporting that the GM Heritage Center can give them the original build configuration for any Caddy from '26 to '70. Maybe someone could call them and see if this service is available to other model lines?
Brian