Available as either a rear-wheel or four-wheel drive pickup truck, the 2012 Sierra 1500 Hybrid comes in only a crew cab, short box body style. Powered by a Vortec 6-liter V-8 engine producing 332 horsepower, the 2012 GMC Sierra 1500 Hybrid is most noteworthy for its unusual two-mode transmission. With two integrated electric motors, the two-mode hybrid setup is designed to deliver fuel economy of 20 miles per gallon city and 23 mile per gallon highway. The hybrid system allows not only maximize fuel economy but also enables the engine to temporarily shut down at a standstill. Standard features are abundant on the 2012 GMC Sierra 1500 Hybrid including dual-zone climate control, Bluetooth connectivity, cruise control and heavy-duty suspension. Safety equipment found on the 2012 GMC Sierra 1500 Hybrid is rich with OnStar, StabiliTrak with anti-lock braking and six airbags on all models.