Alongside the Chevy Silverado, the GMC Sierra full-size pickup is one of the best-selling vehicles in Canada year in and year out. Available with a large selection of engines, it stands out from its corporate cousin by offering Denali and AT4 models for extra luxury and off-road capability, respectively. Another highlight of the Sierra is the six-position MultiPro tailgate, which maximizes versatility for owners who demand a practical, hard-working truck.