A new panel forming process gives the dually models integral, seamless rear fender flares and smoother finish for improved paint. This gives the dual rear-wheel trucks a much nicer appearance than that of, say, the heavy-duty Dodge Ram.

The wallpaper sized, ruby red GMC logo makes its origin plainly obvious but the bumper that blends into the fenders gives a much cleaner look and is unusual in HD pickups. Increased frame stiffness allows a smaller gap between the cab and body, and combined with the more aerodynamic windshield and narrower door gaps, makes the Sierra much quieter than its predecessor.

The box sides are deeper by an inch-and-a-bit, the tailgate has a optional lock and assist for closing it with less effort, and the cargo management option fits rails to three sides of the bed; these can be used for tie-down points and to carry a variety of tool or utility boxes. The stoutest Sierra HD's can tow 13,000 pounds with the new 2.5-inch receiver hitch, and the new dual-element mirror and trailer brake control options will lower the stress level.

The Sierra offers similar external dimensions to those of the Ford and Dodge trucks: more than six-and-a-half feet wide outside with room for a 4x8-foot sheet of building material to ride flat in the long bed.

Sierra 4WD versions ride slightly lower than competing pickups, and that inch or two could make the difference in commercial garages or fifth-wheel/bed clearance. The lower bed height is appreciated greatly when loading and unloading cargo.