The fourth 20th Century All GM Car Show was held under beautiful blue skies recently at the headquarters of Wyler Automotive. Sponsored by the Greater Cincinnati and Northern Kentucky Oldsmobile Club and the Southern Ohio Rockets, the event brought in over175 cars that were either GM brands or powered by a GM engine. The other caveat was that they all had to be from 1999 or before. Since it was sponsored by a couple of Olds clubs, that's where we'll start. There were a number of Cutlass and, especially 442 cars on display. Here are just a few.