At first look the new GMC Denali very much resembles to the 2015 Chevrolet Silverado 2500/3500HD! But, GMC seem to be raising the standards much higher with the 2016 GMC Denali 3500HD. It has a new and refined look thanks to the new LED lighting and its masculine body. Also the new GMC is specially built to allow air circulation in the engine compartment and inside the car.