This yellow Buick Skyhawk sits on a signpole at an old auto shop in Sandusky, Ohio.
An attempt to locate further information yielded no results, but someone mentioned to me back in the mid-90s that they saw it so apparently its been there for a long time.
Art - Advertising, Signs, Billboards and Writing, Vehicle - Cars and Trucks
By: Touringfmhome
https://www.google.com/maps/@41.4405801,-82.7378598,3a,60y,178.13h,103.92t/data=!3m6!1e1!3m4!1s4OGTWxwPHW9hGQZA_u7opw!2e0!7i13312!8i6656?hl=en