It allows users to create custom dashboards to monitor specific GM-enhanced parameters in real-time.
Select the specific PIDs you want to monitor (e.g., fuel trims, knock retardation, timing advance) and hit capture. You can export this raw hex or parsed data directly into CSV format for analysis in software like MegaLogViewer or Excel. Why Enthusiasts Prefer It Over Retail Scanners Generic Handheld Scanner GM Mode 22 Tool by Terry Cost $30 - $100 Free / Low-cost software + basic adapter Data Depth Basic emissions PIDs only Full GM-specific DIDs (ABS, TCM, BCM) Refresh Rate Slow (1-5 Hz) High-speed packed data (20-50+ Hz) Customization None (Hardcoded) Open tables; user can manually add hex addresses Logging Rarely supported or limited Advanced CSV export for tuning integration Safety and Best Practices
Do not use “All Data.” Hand-pick:
Connect your hardware interface to the vehicle's OBD-II port and link it to your PC via USB or Bluetooth.
Toggle the baud rate setting between 9600, 38400, and 115200 until characters stabilize. Too many Mode 22 PIDs are being requested simultaneously. gm mode 22 scan tool by terry
To use the tool, users typically need to:
Among DIY mechanics and tuning enthusiasts, the has emerged as a legendary, budget-friendly software solution. It bridges the gap between cheap generic scanners and thousand-dollar factory tools. What is GM Mode 22? It allows users to create custom dashboards to
Check Device Manager for the correct COM number; close conflicting apps like Torque or ScanMaster. Vehicle key is off or the adapter is poorly seated.
When working on a 1996-2005+ GM vehicle, generic OBD2 tools often show "N/A" or garbage data for advanced sensors. The GM Mode 22 Scan Tool fills this gap. Why Enthusiasts Prefer It Over Retail Scanners Generic
Always ensure your vehicle battery is fully charged or connected to a maintainer. Voltage drops during deep diagnostic polling can cause modules to drop offline.
If you tell me the year, make, model, and engine of your vehicle, I can help you identify the correct ECM definition file for the tool. Share public link