Gm Mode 22 Scan Tool By Terry [updated] Jun 2026

Through Mode 22, a tool can read proprietary sensor data, fast-update parameters, clutch pressures, individual cylinder misfire counts, and raw hex data from the vehicle's data buses (such as VPW, High-Speed CAN, or Low-Speed CAN). The Origins of Terry’s Scan Tool

The tool sends a custom macro command to put the vehicle's data bus into diagnostic mode, silencing non-essential chatter from other modules to clear bandwidth for your data.

The GM Mode 22 Scan Tool by Terry: Specialized Functionality gm mode 22 scan tool by terry

Monitoring TPS to ensure it is not sticking.

The GM Mode 22 Scan Tool, created by Terry, is likely a software or hardware tool designed to interface with GM vehicles that support Mode 22. This tool allows users to access and interpret the data provided by the vehicle's onboard computer. Through Mode 22, a tool can read proprietary

It bypasses generic restrictions to show exact sensor voltages, raw counts, and fluid temperatures. Key Features of Terry's Tool

For its time, the software was surprisingly full-featured, centered on a practical interface with the following capabilities: The GM Mode 22 Scan Tool, created by

While "Terry's" tool is a lightweight utility, it sits between basic code readers and professional factory equipment: OBD II Generic PID Diagnosis - MOTOR Information Systems

: Plug your ELM327 tool into the computer via USB or pair it via Bluetooth. Ensure the corresponding Virtual COM Port drivers (often FTDI or Silicon Labs drivers) are fully updated in your Windows Device Manager.