GitHub - mikebb203/IPC-Hammer: Modified version of PCM Hammer. Used to program calibration and OS or just the calibration section of 03-06 and 07 classic GMT800 instrument clusters.
PCM Hammer: Basic Overview Of Free LS Tuning Software - YouTube
GitHub - LegacyNsfw/PcmHacks: PCM Hammer & PCM Logger, tools for General Motors Powertrain Control Modules (PCMs).