General Motors accelerates builds 87% and unifies 19,000 engineers with GitHub Enterprise and Copilot

General Motors consolidated 19,000+ developers and 150,000 repositories from 40+ fragmented tools onto GitHub Enterprise Cloud, reducing a critical build from 4–6 hours to 27 minutes. By adopting GitHub Advanced Security with Copilot Autofix and deploying GitHub Copilot to 8,000+ developers, GM remediated 100% of leaked secrets and modernized legacy COBOL and Fortran systems.

Impact

99%

Source code standardized on GitHub

40:1

Tools reduced to single platform

27 minutes

Build time (down from 4-6 hours, 87% faster)

Under 3 days

Runner image creation (down from months)

22,000+

Leaked secrets surfaced and 100% remediated

1.2M+

Potential vulnerabilities identified by CodeQL

8,000+

Developers using GitHub Copilot across 55+ languages

Challenge

GM’s developer ecosystem was fragmented across 40+ disconnected tools, creating friction for nearly 20,000 engineers, slowing builds to 4–6 hours, and introducing unknown security risks. Legacy systems in COBOL and Fortran had little documentation and were difficult to maintain.

Solution

GM consolidated onto GitHub Enterprise Cloud with VNet-injected runners for elastic cloud scale. They adopted GitHub Advanced Security with CodeQL and Copilot Autofix for AI-accelerated vulnerability remediation. Over 8,000 developers use GitHub Copilot to boost productivity and modernize legacy code.

Tools & Technologies

GitHub Actions Developer Tools

CodeQL Security

GitHub Enterprise Cloud Developer Tools

GitHub Advanced Security Security

GitHub Copilot Developer Tools

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Similar Cases

Cathay

63%

reduction in mean time to remediate security fixes

Cathay, the Hong Kong-based premium travel brand that operates Cathay Pacific airline across 100 destinations with 30,000+ employees, unified its development and security toolchain on GitHub Enterprise, deployed GitHub Copilot to 1,000+ developers, and embedded security scanning into daily workflows through GitHub Advanced Security. The result was a 63% reduction in mean time to remediate security vulnerabilities and a 40% year-over-year improvement in tech debt fixes.

developer velocity increase with github copilot

AstraZeneca, one of the world’s largest pharmaceutical companies, unified 5,000 developers and scientists onto GitHub Enterprise, automated CI/CD with GitHub Actions, and deployed GitHub Copilot — achieving a 40% increase in developer velocity in its pilot program and generating 9 to 10 additional hours of productive output per developer each week. With drug development timelines measured in decades, the company views even marginal acceleration as directly impacting patient outcomes.

developer productivity increase with github copilot

WEX, a global fintech company that processes payments for fleet management, employee benefits, and corporate spending, consolidated a fractured developer ecosystem of 300+ Azure DevOps organizations onto GitHub Enterprise and deployed GitHub Copilot across its engineering workforce of 1,700+. The result was approximately 30% higher developer productivity, ~60% ROI on Copilot licenses, and a 99% reduction in deployment cycle times.

developer speed increase for developers new to a repo

Duolingo, the world’s most popular language learning app with over 500 million users, relies on GitHub Enterprise, GitHub Copilot, and GitHub Codespaces to keep 300 engineers moving fast across a 400-repository microservices codebase. GitHub Copilot delivered a 25% speed increase for developers new to a codebase, Codespaces reduced setup time for the largest repository to under a minute, and custom API integrations cut code review turnaround time by 67%.

Education

GitHub Codespaces

GitHub Enterprise