I have the info for the Canadian built vehicles,
Here is the E-mail:
Mr Hayes,
Thank you for your email.
Your request for information on your very rare matching numbers 1980 GMC C25 Sierra Classic with the rare ZY5, Z83, BY1 packages can be processed through our Vintage Vehicle Services department. This information is provided on a research basis and includes all available data, such as option content, selling dealer, original paint and trim, production/shipping dates, production plant, engine number, quantities of the model produced/sold in Canada, and copies of Motor Vehicle Manufacturers specifications or sales data, as available. The availability of this information may directly relate to the vehicle's age.
If you are interested in a vintage package, you are welcome to call 1-888-467-6853. There is a fee for this service.
Thank you for contacting General Motors of Canada Limited. Please visit our website again!
If you wish to reply to this email, please click here:
https://contactus.gm.ca/req_reply.as...88802&lang=ENU