1908 operation inside a Buick building. It closed about 1976, and was demolished shortly thereafter. Dort Highway plant and division HQ/Delphi Flint East This plant manufactured spark plugs, air, oil and fuel filters, instrument clusters and other parts. It opened around the mid-1920s in the former Dort (automobile) plant. The Dort Highway plant became known as Flint East when AC took over the old Chevrolet manufacturing operations on Chevrolet Avenue in 1987. In 1988 AC Spark Plug merged with GM's Rochester Products Division, and was renamed AC Rochester. World headquarters remained in Flint, soon moving to the Great Lakes Technology Center. In the late 1980s, parts of Flint East were turned over to GM's Delco Electronics. In 1994, AC Rochester merged with Delco Remy and became the short-lived AC Delco Systems. 1995 saw the creation of Delphi Automotive Systems (which took over Flint East), and in 1999 GM spun off Delphi. Spark-plug production ended at Flint East in early 2006. Under an agreement reached by Delphi, General Motors, and the United Auto Workers in June 2007 Flint East and two other plants would remain open, operated by GM or a third party designated by GM. Hourly employment at the plant at that time had diminished to approximately 1,100 people. A GM Service Parts Operations packaging and processing center has opened in the easternmost plant in the complex, on Davison Road in Burton. A spokesman for GM confirmed in February 2013 that Delphi Flint East will close in November 2013; the factory building is owned by DPH Holdings, while the equipment is owned by Delphi. Chevrolet Motor Division Flint Manufacturing Div./Delphi Flint West/Flint Tool and Die The plant opened on Wilcox Street, later renamed Chevrolet Avenue, about 1913, comprising the Motor Division (engine-assembly and engine-parts plants) and the Pressed Metal Division (parts plants) and the pre-World War II Chevrolet Assembly (Plant Two) and Fisher Body #2 plants (later Chevrolet Plant 2A). It was located at the corner of Kearsley Street and Wilcox Street. This was also originally known as the Flint Wagon Works before it was relocated to its current location, known as Buick City. In 1984, due to smaller sales of four-cylinder engines, the Chevrolet Flint Motor Plant (Plant Four) closed after millions of dollars in improvements several years earlier. The same year, the newly created Chevrolet-Pontiac-Canada Group briefly took over Chevrolet Manufacturing from Chevrolet Motor Division; soon, the newly