Let the truck wars begin.Chevrolet unveiled its much-hyped 2019 Silverado pickup truck Saturday night at Eastern Market, kicking off a trio of truck reveals expected at the Detroit auto show.Weighing 450 pounds lighter than its predecessor, the Truck of Steel doubles down on the durable metal with a roll-formed (not stamped) high-strength bed, it boasts the biggest box in the segment – increasing width by seven inches and length by one inch over the current truck. The Chevy bed also makes news at the North American International Auto Show with a segment-first power tailgate that can be opened or closed by key fob, cabin button or hand.The debut sets up a heavyweight showdown with its arch-rival, the aluminum-bed Ford F-150. . .