The 2009 Chevrolet Suburban full-size SUV is available in 1500 and heavy-duty 2500 models, each available in either two-wheel drive or four-wheel drive. All are available in the base LS and the midlevel LT (with two equipment subcategories, 1LT and 2LT). The top-shelf LTZ model is available as a 1500 only. The LS comes standard with 17-inch wheels, side assist steps, a 40/20/40-split front bench seat, full power accessories, steering-wheel-mounted audio controls, dual-zone climate control, rear seat air-conditioning, Bluetooth phone connectivity and an eight-speaker audio system with CD player, auxiliary audio jack and satellite radio. The 1LT trim level replaces the front split bench with front bucket seats and adds foglamps, luggage rack rails, rear audio system controls with two headphone jacks and additional power outlets (for a total of five). The 2LT package adds tri-zone automatic climate control, an upgraded audio system with six-CD changer, power-adjustable pedals, remote vehicle starting, a universal home remote and rear parking assist. Chevrolet offers three engine choices on the 2009 Suburban 1500. Most versions come standard with a 5.3-liter V8 that makes 310 horsepower and 335 pound-feet of torque. On the 2LT and LTZ trim levels, a 6.0-liter V8 that pumps out 366 hp and 376 lb-ft of torque is optional. All 1500 engines are paired with a new six-speed automatic transmission. Like other cars in GM's portfolio, the Suburban's interior has greatly improved over the years. Materials quality is good and controls are logically laid out. With its standard third row, the 2009 Suburban can seat up to nine people -- a total surpassed only by full-size vans. Although the Suburban's second row is available with a power-folding feature, the third-row seats must be removed manually to optimize cargo space.