The Sierra Hybrid is offered in a Crew Cab bodystyle, in either two-wheel drive or four-wheel drive. Its 6.0-litre V8 engine includes Active Fuel Management, giving it the ability to run as an economical V4 when full power isn't needed. The Electrically Variable Transmission works with a 300-volt nickel-metal hydride battery system to allow the vehicle to launch and drive up to 30 mph on electric power alone. Other features such as electric-assist power steering and low rolling resistance tires help to provide a 25-percent improvement in overall fuel economy. Safety features include four-wheel disc anti-lock brakes, front and side curtain airbags, electronic stability control and tire pressure monitoring.A navigation system and rearview camera system are new options for 2010.