Funny story....
Here's one for you...back in the early 90's, me and my dad went to NAPA to get a set of radiator hoses for the GN. We went in, told the clerk what we needed and of course he asked "what vehicle". Dad told him an 87 Buick Grand National V6 Turbo. The guy looked in his catalogs for a few minutes with a look on his face and said "There ain't no such thing!" Me and dad looked at each other about to laugh and told the guy to look outside. He looks, goes to the back and has two hoses in hand. They were short and looked like they belonged to a 4 cyl . Dad said they won't work and he wanted to see the engine. After we showed him, we were like forget it, we'll take our business else where.
Whats funny is the parts guy was correct. The correct name is regal code 7 or regal with 3.8sfi turbo engine. Grand national is a package not a model at least in parts books.
That is the other side of the coin.If I go in to the parts store and ask for parts for my 99 ultra what are they going to say.