Mode $22 allows a scan tool to request specific data parameters (PIDs) directly from individual electronic control modules (ECUs). This includes data from the: Powertrain Control Module (PCM) Transmission Control Module (TCM) Body Control Module (BCM) Electronic Brake Control Module (EBCM/ABS)
The General Motors (GM) OBD-II diagnostic ecosystem is vast. While basic code readers can pull standard Powertrain (P0xxx) codes, they barely scratch the surface of your vehicle's computer networks. For advanced diagnostics, live data streaming, and module communication, professionals rely on GM Mode 22. gm mode 22 scan tool by terry
Accessing specific Body Control Module (BCM) data. Alternatives in the Modern Era Mode $22 allows a scan tool to request
Advanced variants of the software interface with standard J2534 hardware (like a DrewTech Mongoose or a high-quality clone) for flawless bus communication. How to Use the Tool for Diagnostics For advanced diagnostics, live data streaming, and module