Automotive Tier 2 Suppliers Companies in Illinois

Illinois has approximately 13,000 manufacturing establishments and 570,000 manufacturing employees. Illinois is a top-five manufacturing state, with Chicago as a metal fabrication and food processing center, Peoria as Caterpillar's headquarters, and a vast network of industrial suppliers.

Illinois is one of the leading states for automotive tier 2 suppliers. Automotive Tier 2 suppliers manufacture components and sub-assemblies that are sold to Tier 1 suppliers for integration into larger automotive systems. These companies include precision machine shops, stamping companies, die casters, injection molders, and specialty component manufacturers that form the backbone of the automotive supply chain.

Precision Machining Shops: CNC machining companies producing close-tolerance turned, milled, and ground components for automotive applications.

Metal Stamping Companies: Progressive die and transfer press operations producing brackets, housings, and structural stampings.

Die Casting Operations: Aluminum and zinc die casters producing housings, brackets, and structural castings for Tier 1 assemblies.

Injection Molding Shops: Custom molders producing plastic components, connectors, and housings for automotive systems.

Heat Treatment & Surface Finishing: Companies providing hardening, plating, coating, and other surface treatments for automotive parts.

Major industrial centers in Illinois include Chicago, Rockford, Peoria, Aurora, Joliet, and Elgin. These cities have concentrations of manufacturers across sectors including metal fabrication, food processing manufacturing, and chemical manufacturing.