The Vortec 6.2L V8 (L94) engine has 403 horsepower at 5,700 rpm and 417 lb-ft of torque at 4,300 rpm. The L9H version of this engine has the same power figures. Both engines are "E85 Capable".
The "Vortec" name first appeared on GM 4.3L V6 engines in 1986. These engines were the first to use the new "Vortex technology" that was designed to create a vortex, or powerful swirl like a tornado, inside the combustion chamber. In other terms, the Vortec engine is a Sequential Port Fuel Injection (SFI) engine, which utilizes a sophisticated computer system known as the "Vehicle Control Module", or VCM, in conjunction with numerous sensors to monitor and adjust the control of the engine.
In recent news from GM, for the 2014 model year, the Silverado will be offered with a choice of three new EcoTec3 engines: a 4.3 liter V6, a 5.3 liter V8 and a 6.2 liter V8 engine. All three engines will be mated to a six-speed automatic transmission that features Auto Grade Braking, which downshifts on downgrades to help reduce brake wear. For the 2014 model year, the Silverado will be offered in three trim levels: LT, LTZ, and Z71. The Z71 will offer Rancho shocks, a GM-exclusive automatic locking rear differential, among other features.