There is no tougher vehicle arena than full-size pickup trucks. Competitive? You bet. It is where the 2021 GMC Sierra 1500 slugs it out with the big boys: the Ford F-150, the Ram 1500 and GM sibling Chevrolet Silverado. You…

There is no tougher vehicle arena than full-size pickup trucks. Competitive? You bet. It is where the 2021 GMC Sierra 1500 slugs it out with the big boys: the Ford F-150, the Ram 1500 and GM sibling Chevrolet Silverado. You…