Ken
The GM Heritage site that Tim linked to has this info:
"In addition to visual media, this archive is also home to our company’s collection of vehicle build documentation, dealer invoices and/or build sheets, which contains information about individual vehicles produced by GM and exists on various digital and microfilm formats. The documentation is not available for all vehicles and dates only to 1977 for most brands.
To request vehicle documentation please email
[email protected] or call 1-734-261-5086."
You need to click on Archives to get to that page, but nothing is available for download currently.
The "vehicle Info kits" that I refer to have general engineering info on each year model, including frame, axle, engine info, but nothing on VINs or specific individual vehicles. I'll e-mail you a sample so you can take a look at them.
