2015 GMC Sierra HD – One of Americans favorite trucks, GMC Sierra. Designed to provide increased comfort and smarter technologies, the new GMC Sierra HD 2015 advances a 111-year legacy of professional heavy-duty trucks in the U.S. The new GMC’s Sierra HDs arrive in the first quarter of 2014, including the 2500HD and 3500HD models, and the Sierra Denali HD, which fits with do-it-all feature with an exclusive design package and upgraded Interior amenities. Claimed to be segment-leading capabilities across the range includes the highest payload up to 7374 pounds and the highest conventional trailering rating 19,600 pounds. Maximum fifth wheel towing rating of 23,200 pounds.
As 2015MY, the Sierra Denali features chrome grille, a polished stainless steel exhaust outlet, an all-new headlamp and body-color front and rear bumpers. The new design also improved aerodynamics allow the trucks to slip through the air with less drag and reduced wind noise.
Beside that it said to be have premium materials, greater attention to detail and purposeful technologies define the passenger space, with soft-touch materials and aluminum trim, the GMC Sierra Denali HD’s interior come with a lot of features; 4.2-inch-diagonal color driver information center, with vehicle status details, a 110-volt outlet, up to five USB ports, four 12-volt outlets and an SD card slot.
As its class leading, GMC Sierra HD comes with a Vortec 6.0L gas V8 engine with variable valve timing combined with the Hydra-Matic 6L90 six-speed automatic transmission as the standard powertrain. This powertrains has excellent efficiency and performance, especially in low torques. Claimed at 360 HP (268 kW) and 380 lb-ft of torque (515 Nm) in Sierra 2500HD models and 322 HP (240 kW) and 380 lb-ft (515 Nm) in Sierra 3500HD. The engine also features special hardened valves and valve seats that enables it to run on compressed natural gas or gasoline.
The second engine is Duramax 6.6L diesel and Allison 1000 matched with the six-speed automatic transmission that available on all 2500HD and 3500HD models. It is rated at 397 HP (296 kW) at 3,000 rpm, 765 lb-ft of torque (1,037 Nm) at 1,600 rpm.