Watch now the strongest and most capable Chevy Silverado HD ever! Customers can choose between two new powertrains. The standard engine is a new 6.6L V-8 gas with direct injection making 401 horsepower and 464 lb-ft of torque mated to a six-speed automatic transmission. That’s an 11 percent increase in horsepower and a 22 percent increase in peak torque, respectively, resulting in 18 percent more towing capability. Then there’s the legendary Duramax 6.6L Turbo-Diesel V-8 engine making 445 hp and 910 lb-ft of torque coupled with an all-new Allison 10-speed automatic transmission. In addition, every component between the transmission and the wheels has been upgraded to enable an available 52-percent increase in max towing capability — now up to 35,500 pounds on Regular Cab, two-wheel drive, DRW, diesel models.