Detroit’s Big Three supply chain answers in 3 seconds

Detroit and the surrounding Michigan region are headquarters to all three of America’s domestic automakers — Ford, General Motors and Stellantis (formed from the Fiat Chrysler-PSA merger) — commonly called the Big Three. Over a century of concentrated engineering, assembly and supplier infrastructure makes Michigan the deepest automotive manufacturing bench in North America. IgeraIndustria indexes the technical and quality documentation of this Big Three supply base.

Michigan’s automotive base grew around domestic Big Three headquarters and legacy union representation through the UAW, unlike the Southeast corridor built on foreign automaker transplants in right-to-work states. Suppliers serving Ford, GM and Stellantis navigate UAW-adjacent labor agreements and decades-old sourcing relationships that shape how quality documentation and audits are structured.

IATF 16949 is the global automotive quality management standard, requiring APQP, PPAP and FMEA documentation on top of ISO 9001. Ford, GM and Stellantis all mandate current IATF 16949 certification from every Tier 1 and Tier 2 supplier in their Michigan and broader Midwest network. IgeraIndustria indexes certification records and control plans for immediate audit retrieval.

GM, Ford and Stellantis are each investing billions in Michigan-area battery cell plants and EV assembly conversions, layering new battery safety and cell manufacturing documentation on top of legacy IATF 16949 requirements. Suppliers now manage compliance for both internal combustion and electric powertrain programs simultaneously, often within the same facility.

United Auto Workers representation is deeply embedded across Big Three assembly plants and many unionized Tier 1 suppliers in Michigan, shaping staffing, training and shift documentation in ways distinct from the non-union Southeast transplant corridor. IgeraIndustria centralizes training records and standard work instructions relevant to this labor context alongside quality documentation.

Every component supplied into a Ford, GM or Stellantis Michigan assembly line must be traceable from Tier 2 raw material through Tier 1 processing to final vehicle assembly, backed by PPAP and certificates of conformance. IgeraIndustria links material, process and certification records into one searchable source for supplier quality teams.

The auditor queries the control plan, PPAP package or FMEA directly, and IgeraIndustria returns the exact document and section in under 3 seconds, reducing the time a quality team spends preparing binders before a Big Three supplier audit.

This page covers Detroit and Michigan’s domestic Big Three base — Ford, GM and Stellantis — with UAW-adjacent labor context and EV battery plant investment. The Southeast automotive page covers the foreign automaker transplant corridor in Kentucky and Tennessee (Toyota Georgetown, Volkswagen Chattanooga), a right-to-work manufacturing environment with a distinct labor and sourcing history despite sharing the same IATF 16949 quality standard.