The Sierra 2500HD and 3500HD models – including the Sierra Denali HD – have bold, new styling and all-new, better-connected interiors for 2015. They are also offered with the Duramax 6.6-liter turbo-diesel engine mated to an Allison 1000 six-speed transmission, a proven combination with more than 1.5 million sold since introduction in 2000. Trim levels include a Sierra base model, as well as SLE, SLT and Denali. The distinctive Sierra Denali HD, which accounts for more than one-third of Sierra HD crew cab sales, is offered exclusively as a crew cab, matching do-it-all capability with an exclusive package of design and upscale interior amenities. The Sierra HDs’ new styling and an all-new, more comfortable and technology-infused interior are carried forward from the 2014 Sierra 1500, including new double cab and revised crew cab body styles. Larger rear doors on each, along with new seat designs, enable easier entry and exit from the rear seat and two inches of additional legroom on crew cabs.
The new interior is also designed to help drivers and passengers whether they’re on the job or on a weekend getaway, with easier-toreach, more intuitively located controls, more storage compartments, more plug-ins for electronic devices and next-generation GMC IntelliLink – with an eight-inch-diagonal color touch screen.
Regular, double cab and crew cab models are offered across the lineup. 2500HD and 3500HD regular cab models are matched with an eight-foot box, while 2500HD double cab and crew cab models are available with six-foot-six-inch or eight-foot boxes. Sierra 3500HD double cab is offered exclusively with the eight-foot box, while 3500HD crew cabs are available with the six-foot-six-inch and eight-foot boxes. Dualrear- wheel configurations are also available on 3500HD.
Gas and Duramax diesel powertrains are offered across the lineup, including an expanded bi-fuel option that allows the gas engine to run on compressed natural gas. The Duramax has been developed to operate for at least 200,000 miles on a rough-duty cycle without need for a major overhaul.
Additional new and enhanced features include a standard CornerStep rear bumper, EZ Lift and Lower tailgate (standard on SLE, SLT and Denali), standard locking tailgate, standard upper tie-downs and other features that make cargo handling easier; and standard StabiliTrak with Trailer Sway Control on all models, including 3500HD dually.
The base MSRP on the Chevrolet Sierra 2500HD is $31,310, while the Denali list is $50,135.