The motor and drive unit are assembled at GM's Baltimore operations plant in White Marsh, Md.

ENGADGET: Chevy Spark EV rated most efficient retail car with 82-mile range, 119 MPGe

The drive unit and motor will be assembled of U.S. and globally sourced parts at GM's White Marsh, Md.

ENGADGET: Chevy details 2014 Spark EV: under $25,000, 0-60 in 8 seconds and a 20-minute fast charge

Last week, the plant celebrated Spark EV motor production, marking the first time a major U.S. auto manufacturer has designed and built both a complete electric motor and drive unit for a modern electric vehicle in the United States.

ENGADGET: Chevy Spark EV rated most efficient retail car with 82-mile range, 119 MPGe

It consists of a GM-designed, coaxial drive unit and electric motor that together deliver 130 hp (110 kW) and 400 lb.

ENGADGET: Chevy details 2014 Spark EV: under $25,000, 0-60 in 8 seconds and a 20-minute fast charge