Powered by the new Duramax 6.6-liter turbocharged V8 diesel engine, the Chevrolet Silverado HD pulled a United States flag measuring nearly 40 by 80 feet, with an area of 3,186 square feet. To set the new record, the truck had to travel 328 feet (100 meters) without the flag touching the ground and the Silverado more than exceeded that requirement, completing four laps around the Texas Motor Speedway’s 1.5-mile oval.