The Silverado 2500HD and 3500HD models are distinguished by a power dome-style hood with a louvered design, as well as a wide grille with chrome surround and full-width chrome steel front bumper. A lineup of 17- (Dually), 18- and 20-inch wheel/tire combinations are offered.
New and revised features for 2012 include a navigation radio with CD, USB port and an 80-gig hard drive, heated and cooled front seats available on LTZ models, side curtain and seat-mounted air bags offered on 3500 SRW models and new interior color combinations for LT models. There is also a new Z71 appearance package for LT and LTZ models and new exterior colors: Silver Ice Metallic, Mocha Steel Metallic (WT models), Black Granite Metallic (WT models) and Graystone Metallic (WT models).
Click the attached link below to view the complete factory technical specifications of the 2012 Chevrolet Silverado 2500HD & 3500HD in .pdf format