One look and it’s easy to see the difference a complete redesign makes: More pronounced, yet subdued fender blisters front and back, a strong new grille and headlight casings that make the Sierra more muscular and more uptown. Gone is the GMC face, replaced by a bolder chromed front assembly that looks as if it’s been molded to the truck. The most significant changes made, however, are harder to detect but speak of GM’s renewed mandate of quality construction. Exterior gaps on the new model, especially between the cab and the bed, have been significantly reduced, and the hood now fits flush inside the fenders instead of capping fender and grille.