The Suburban is synonymous with room and cargo hauling capability (up to 12,000 lbs. towing). A standard 5.3L V-8 can use E85 ethanol fuel. The luxurious LTZ model is equipped with the Vortec® 6000 engine, AWD, and 20-inch wheels. A 8.1L V-8 is also available on the 3/4-ton Suburban. All engines are mated to a 4-speed automatic. A tire pressure monitoring system is standard. Optional Stabilitrak® vehicle stability control and front side-impact airbags are available.