Following the reveal of the Chevy Silverado High Country , GMC has released the first photos of the 2014 Sierra 1500 Denali full-size pickup that will launch this fall in the United States. The third generation of the Sierra Denali will be available with a 6.2-liter EcoTec3 V8 engine that produces approximately 420 horsepower and 450 lb-ft (609 Nm) of torque, figures that will make it the most powerful light duty truck on the market. Read more »