The LS trim starts with a good selection of standard features. You get 18-inch steel wheels, sound-insulating laminated windows, automatic headlights, cruise control, power-adjustable mirrors, air-conditioning, an eight-way power-adjustable driver seat, a tilt-and-telescoping steering wheel, and 60/40-split folding rear seats. New for 2018 are keyless entry and start, a rearview camera and Chevy's MyLink infotainment system with an 8-inch touchscreen interface, a six-speaker audio system, OnStar (includes 4G LTE and Wi-Fi hotspot connectivity), Apple CarPlay and Android Auto compatibility, and two USB ports. Moving up to the LT adds 18-inch alloy wheels, remote engine start, heated mirrors, as well as dual-zone climate control, leather-wrapped steering wheel and shift knob, power front-passenger lumbar adjustment, fore-aft adjustable front headrests, folding rear headrests, and a few other small interior trim upgrades. The Impala LT also has access to a number of upgrade packages. The Driver Confidence package adds blind-spot monitoring, rear cross-traffic alert and rear parking sensors. A sunroof and rear spoiler can be added with the Sunroof and Spoiler package. The LT Entertainment Package adds navigation, an 11-speaker Bose stereo system, a CD player, ambient interior lighting and a 120-volt outlet. There's also the LT Convenience package, which includes heated front seats and a heated steering wheel and an auto-dimming rearview mirror. The Convenience package can be upgraded with the LT Leather Package, which adds leather upholstery and a full power-adjustable front passenger seat. The top-trim Impala Premier gets 19-inch wheels, xenon headlights, heated power seats and leather upholstery, a wireless charging pad, and some unique exterior accents.