The 2013 Sierra lineup is characterized by a rugged yet refined appearance, with chiseled bodywork complemented by details such as chrome bumpers (Sierra Denali features body-color bumpers). Additional elements, including flared rear fenders and premium headlamps, contribute to Sierra's refinements, while features such as large, grab-style door handles -- designed for easy use with work gloves -- reinforce the notion that it is a truck first and foremost. Sierra 2500HD and 3500HD models are distinguished by a power dome-style hood with a louvered design, as well as a wide grille with chrome accents and full-width chrome steel front bumper. A lineup of 17- (Dually), 18- and 20-inch wheel/tire combinations are offered