The Suburban 1500 is available in LS, LT, and LTZ trims in both two-wheel drive or four-wheel drive. It can seat up to nine passengers in its three rows of seats. The standard engine is a 320-hp 5.3-liter flexible-fuel V8 with Active Fuel Management technology, and is matched with a six-speed automatic transmission. All-disc anti-lock brakes, traction control, side curtain airbags and GM's StabiliTrak electronic stability system with rollover mitigation are standard. Seat-mounted side air bags are now standard on all trims. New audio systems feature audio-DVD and USB ports.