Facility Details
The first iron was poured at the Defiance Casting Operations plant on August 23, 1948. From 1948 through 1991, the foundry was part of GM's Central Foundry Division. During strategic restructuring, Central Foundry became part of the new
Plant Details
Facilities: Plant - 1.1 million sq. ft. Plant 2 West - 577,000 sq. ft.
Plant 2 East - 316,000 sq. ft.
Year Opened: The first iron was poured at the Defiance Plant on August 23, 1948. From 1948 through 1991, the foundry was part of General Motors Central Foundry Division. During strategic restructuring, Central Foundry became part of the new GM Powertrain group.
Recent Major Investments
- June 2011: $47 million investment to increase the volume of components for fuel efficient Ecotec 1.4 liter engines and the next generation of small block car and truck engines.
- November 2010: $12.2 million investment to add capacity for casting, finishing and premachining.
- April 2010: $115 million investment to produce a new generation of fuel efficient small block truck and car engine components. The investment includes the addition of precision sand casting.
- February 2010: $60 million investment to produce precision sand castings to support the new Ecotec Engine program.
- 2008: $26 million investment to produce Family 0 components to support Voltec and Turbo engines for the Chevrolet Cruze.
- 2007: $61 million investment to produce Precision Sand castings at Defiance.


