Pontiac's 2009 G6 includes three different body styles--sedan, coupe, and convertible. The sedan is available in base, GT, or GXP trim, while the coupe is offered in either GT or GXP models. The convertible is only available in GT trim. The G6 convertible has room for four and a unique, tight-folding hardtop arrangement designed by German coachbuilder Karmann, which can stow away in about 30 seconds. A total of four different engines are offered in the G6 range, each paired with either a 4-speed automatic or 6-speed automatic transmission. Base G6 sedans get an economical 2.4L 4-cylinder engine that produces 164 hp, matched with a 4-speed automatic. GT models step up to a 219-hp, 3.5L V6 with variable valve timing, plus a 4-speed automatic with manual control. The top GXP model gets a more powerful 3.6L engine with variable valve timing, which makes 252 hp and is mated to a 6-speed automatic, also with manual control. On G6 convertibles, the 3.5L engine is standard, while a 3.9L V6 making 222 horsepower is optional. Both come with a 4-speed automatic with manual controls. With the 4-cylinder engine, the G6 returns impressive EPA fuel economy estimates of 22 mpg city, 30 mpg highway, while the 3.5L V6 shows 18 mpg city and 29 mpg highway. The base G6 includes air conditioning, an XM satellite radio, CD player, tilt/telescoping steering wheel, power windows, locks and mirrors, and GM's OnStar system. The mid-range GT adds a generous amount of equipment, including fog lamps, steering-wheel-mounted audio controls, cruise control, keyless entry, leather interior trim and an upgraded 8-speaker Monsoon audio system with subwoofer. In addition to its 3.6L engine and 6-speed transmission, the GXP brings a sportier edge to the G6, with a performance-tuned suspension, 18-inch wheels and StabiliTrak stability control system. A number of other improvements further distinguish it from the GT trim, including a unique front fascia, dual exhaust tips, heated seats and automatic climate control. Front and side-impact airbags are standard on all G6s, while convertible G6s also include head curtain air bags. Four-wheel antilock brakes and traction control are also standard across the line. Available on the base sedan, the Sport Package allows the G6 to transform from a simple people-mover to a respectable performance sedan. It includes StabiliTrak, a transmission upgrade to the 6-speed automatic with driver shift control as well as a shorter 2.89 axle ratio. The Sport Package 2 takes it a step further, including the 3.5L V6 with variable valve timing, 17" aluminum wheels, a 3.05 ratio rear end, and hydraulic power steering. Available on the GT, the Premium Package includes heated leather power-adjustable seats. The Sun and Sound Package includes both a 6-disc CD change stereo and a power sunroof. Also available is the GT Street Edition, which dresses up the G6 with a unique front and rear fascia, mesh grilles, special 18" wheels, as well as StabiliTrak, power mirrors and a chrome exhaust. On the GXP, the Street Edition package goes for an even more extreme look with hood scoops and a spoiler.