In the validation unit of the new 2011 Chevrolet Silverado HD heavy trucks, engineer Brent Deep drag 20,000 pounds (9072 kg) trailer from 245 miles (400 km) along the I-70 between Denver and Grand Junction, Colorado – and almost did not touch the brakes along the road. Deep is based on a new Chevrolet Silverado, bright exhaust brake system to stop the truck or trailer on the descent, helping...