1987 GN - Finding production information to help confirm claim that car was used as an Engineering Development Vehicle, before sale to public

walli659

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Buick Ownership
1987 Buick GN - Engineering Development Vehicle
Looking for help to see if anyone know of any way to find production information to help prove that it was used as an Engineering Development Vehicle, before is was refreshed/restored to production content and sold to public?
 

walli659

New member
2
0
1
Buick Ownership
1987 Buick GN - Engineering Development Vehicle
Thank you very much for the info, I will check it out.
 
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