GM unveils in Texas its tough pickups – the Chevy Silverado HD and GMC Sierra HD image

Chevrolet and GMC revealed the 2015 models of full-size pickups, featuring segment-leading capabilities across the range including the highest payload – 7, 374 pounds (3,344 kg) – and the highest conventional trailer tow rating – 19,600 pounds (8,890 kg).

Due for market release early next year, the heavy-duty trucks resemble their “smaller” counterparts but feature design enhancements like a power-dome hood, enlarged grilles and a one-piece chrome front bumper.

Respective to their predecessors, the new trucks have enhanced aerodynamics for improved efficiency and cooling and also reduced wind noise, a new CornerStep rear bumper, EZ Lift and Lower tailgate, standard StabiliTrak with Trailer Sway Control on all models, integrated cruise control, auto grade braking and diesel exhaust braking.

the range-topping Sierra Denali has a distinctive grille, LED-infused headlights, body-color bumpers and a polished stainless steel exhaust tip (on petrol models). The model also has premium leather upholstery, heated and cooled front seats, a Bose audio system and an Intellilink infotainment system with GPS navigation.

Under the hood, two options are on offer: a 6.0-liter Vortec V8 petrol or bi-fuel engine with 360 hp (268 kW)/ 322 hp (240 kW) and 380 lb-ft (515 Nm) of torque and a diesel engine, the Duramax V8 with 397 hp (296 kW) and 765 lb-ft (1,037 Nm) of torque.