Detroit Assembly Complex – Jefferson, previously known as the Jefferson North Assembly Plant (JNAP), is a Stellantis North America automobile assembly factory in Detroit, Michigan. The plant is located adjacent to the Detroit Assembly Complex – Mack plant. Located on East Jefferson Avenue 6 miles (9.7 km) northeast of Downtown Detroit, near Grosse Pointe Park, the factory opened in 1991 as a major commitment to the city of Detroit by Chrysler, and was expanded in 1999, bringing its area to 2,700,000 sq ft (250,000 m2) and expanded again in 2011, bringing its total to 3,000,000 sq ft (280,000 m2).