Standard features on the entry-level LS (which is four-cylinder only) include 18-inch steel wheels, automatic headlights, keyless entry, cruise control, air-conditioning, an eight-way power-adjustable driver seat, full power accessories, a tilt-and-telescoping steering wheel, a trip computer, OnStar emergency communications, Bluetooth and a six-speaker sound system with a CD player, satellite and HD radio, USB/iPod connectivity, an auxiliary input and a 4.2-inch color display. A convenience package with rear parking sensors, foldable rear headrests and a cargo net is the only option on the LS. Moving up to the LT gets you 18-inch alloy wheels, heated side mirrors, dual-zone automatic climate control, a leather-wrapped steering wheel and shift knob, and the MyLink infotainment interface with an 8-inch touchscreen display, Bluetooth streaming audio and an SD card slot. A four-cylinder engine is standard on 1LT models, while the 2LT has the V6. Options on the LT are grouped in packages (and often have to be purchased in combination with one another) and include an upgraded Convenience package with parking sensors, a rearview camera and remote start, and a Safety package with a collision warning system, a lane departure warning system, rear cross-traffic alerts and blind spot monitoring. There's also a Premium Seating package with simulated suede upholstery and seat heaters; a Navigation package that also includes keyless ignition/entry; and a Bose Audio package and Wheel package that fits the car with 19-inch wheels. A sunroof is a stand-alone option. The top-of-the-line LTZ has all of the above items as standard, save for the Bose audio system and navigation system, which remain optional. The sunroof, meanwhile, is optional on 1LZ models but standard on 2LZ models. All LTZ models come with leather upholstery and are eligible for exclusive options like 20-inch wheels, adaptive cruise control and the Comfort & Convenience package with ventilated front seats, a heated st