The hottest new vehicle sold in 1991 didn’t come from any of the usual suspects. It wasn’t a turbo Porsche, 12-cylinder Ferrari or some limited-edition Mustang. It was a GMC pickup. Yes, we’re talking about a factory-built pickup. It wasn’t even some supersized, go-anywhere pickup sporting monster truck tires, a giant smokestack and a sound system that blasted only Lynyrd Skynyrd. It was the GMCSyclone, a mini pickup that, for one year at least, stood the performance world on its ear.