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Programming a CTS-V Gauge Cluster into an ATS-V, Out of Pure Spite

Varjitt Jeeva

Details how to reverse engineer General Motors electronic gauge cluster programming to retrofit digital dashboards into unsupported vehicles.

Summary

Automotive Electronics Retrofitting

Integrating digital gauge clusters from high-end vehicle models into unsupported platforms often encounters commercial gatekeeping and expensive proprietary reprogramming tools.

Reverse Engineering GM Firmware Protocols

Analyzing General Motors electronic control modules and CAN bus communications uncovered the specific firmware configuration parameters governing instrument cluster operation.

Overcoming Reprogramming Barriers

Developing custom software tools enabled direct flashing and calibration of the Cadillac CTS-V digital cluster to operate seamlessly within an ATS-V vehicle architecture.

Open Source Release and Documentation

Documenting the complete reverse engineering process and releasing reprogramming code openly on GitHub democratizes automotive hardware customization.

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Main Stage·14 min

  • DEF CON
  • Hardware
  • Date: Aug 2025
  • Location: Las Vegas

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