Over the years, we've had many conversations with fellow classic car and truck enthusiasts about the history of our favorite vehicles. When we're speaking with someone who has decades of experience studying and working on classic cars, the conversation often brings up some interesting and little-known facts. In this article, we'll share 20 classic truck facts about Chevy and GMC pickups. Some of them are relatively well-known, while others are very obscure. See how many you know, and keep them in mind next time you're chatting with another classic truck fan.