The first part of this summary showed that the 70s and 80s were not necessarily kind to GM, Ford, Chrysler, and AMC. Although some decent cars came out of Detroit in those years, it was primarily a time of confusion. Safety and emission regulations were being thrown at the car companies almost daily. The public was discovering cars from Japan and Europe. It was a rough time.
But those weren't the only bad years. The 50s and 60s had some stinkers, and even today American manufacturers haven't given up on poor design and bad ideas. That's not to say the other countries didn't have some complete losers as well, but that can be saved for a future article.
This time we have some dishonorable mentions before we get to part 2.
Chevrolet Vega - The cars had horrid engines, poor handling, and numerous reliability issues. They were just a bit too good looking to make this list.
Chevrolet Corvair - The car that launched Ralph Nader's career. It was truly "unsafe at any speed", and had problems galore. There is, however, a loyal following that lovingly restores them to this day, and kudos to GM for trying something different.
Chrysler K Cars - The K cars were poor vehicles in almost every way. Power, handling, quality, and styling were all bad. They managed to save Chrysler though.
AMC Gremlin - The styling was, in a word, different. It was a real love-it or hate-it design. Underneath it all was a fairly capable car.
So without further ado, the rest of the list: