Chevrolet Silverado

On a validation drive of the new, 2011 Chevrolet Silverado HD heavy-duty trucks, engineer Brent Deep towed a 20,000-pound (9,072 kg) trailer for 245 miles (400 km) along I-70 between Denver and Grand Junction, Colo. - and he barely touched the brakes the entire way.Deep relied on the Chevrolet Silverado's new, smart exhaust brake system to slow the truck/trailer combination on descents,