The two powerplants for the Sonic are a 1.8-liter four-cylinder engine (138 horsepower, 125 pound-feet of torque) and a turbocharged 1.4-liter four cylinder (138 hp, 148 lb-ft of torque), which offers dramatically improved fuel economy. The 1.8-liter engine comes with either a five-speed manual transmission or a six-speed automatic, while the 1.4-liter receives either a six-speed manual or the six-speed automatic

The base Sonic LS sedan is, in many ways, a bare-bones commuter, although it doesn't skimp when it comes to infotainment. Standard equipment includes 15-inch steel wheels, automatic headlights, LED daytime running lights, manual side mirrors and manual windows, a rearview camera and remote locking and unlocking. Inside, you'll find a four-way manually adjustable driver seat, a tilt-and-telescoping steering wheel and a 60/40-split folding rear bench.

Infotainment duties are handled by a 7-inch touchscreen running Chevy's MyLink system. This includes Bluetooth, Android Auto and Apple CarPlay compatibility, two USB ports and a four-speaker sound system. GM's OnStar is also included, which adds a 4G LTE data connection and a Wi-Fi hotspot.

The base LS trim is only available with the sedan bodystyle and the 1.8-liter engine. It does not have access to any major options packages.

Moving up to the LT sedan adds 15-inch alloy wheels, power windows, heated power mirrors, upgraded cloth upholstery, a six-speaker stereo system and satellite radio. Oddly, the cheaper LT manual sedan comes standard with the 1.4-liter engine and the six-speed manual, while the automatic comes with the 1.8-liter engine and its six-speed automatic. The 1.4-liter engine is available as a stand-alone option, or with some upgrade packages, for the LT automatic sedan.

Quite a few packages are available for the LT sedan. The Convenience package adds heated front seats, a six-way power-adjustable driver seat, a leather-wrapped steering wheel with heating, an upgraded trip computer with more functionality, and proximity entry with push-button start. The Driver Confidence package adds forward collision alert, lane departure warning and rear parking sensors.

The optional RS package adds sporty styling cues to the exterior and interior, and a leather-wrapped, flat-bottom steering wheel. The Fun and Sun package includes a sunroof, 17-inch alloy wheels and the 1.4-liter engine (with the LT automatic). This package can be had with or without the RS package. Opting for Sun and Fun with RS gets you the RS appearance package and a sport-tuned suspension.

The Sonic LT can also be had in the hatchback bodystyle. Both the automatic and manual LT hatchback come with the 1.8-liter engine and the RS package. Otherwise, similar upgrade packages are available.

The Sonic Premier sedan comes with 17-inch wheels, the 1.4-liter engine, simulated leather upholstery, proximity entry and push-button start, heated front seats, a power-adjustable driver seat and a heated steering wheel (automatic transmission only). Opting for the manual transmission gets you the RS package as standard. The Driver Confidence package is available for the Premier sedan, and the sunroof is a stand-alone option. The Premier hatchback with either the automatic or manual transmission comes with the RS package.