: Terry's tool became a staple on forums like Scantool.net and early car-tuning communities. It paved the way for modern, affordable bi-directional scanners from brands like Launch and Autel that we use today.
Overall, the GM Mode 22 scan tool by Terry is a valuable diagnostic tool that can help technicians and repair shops improve their efficiency and accuracy when working on GM vehicles. gm mode 22 scan tool by terry
The GM Mode 22 scan tool is a handheld device that's designed to connect to your vehicle's OBD-II port, allowing you to access a wide range of diagnostic information and perform various tests. The tool is specifically designed for General Motors vehicles, including cars, trucks, and SUVs. : Terry's tool became a staple on forums like Scantool
The GM Mode 22 scan tool features a user-friendly interface, with a logical and intuitive layout. The main dashboard provides quick access to essential functions, while the menu system allows users to navigate to more advanced features. The GM Mode 22 scan tool is a
Terry was a community programmer who recognized that professional tools like the Tech 1 or Vetronix Mastertech were expensive, rare, and locked to dealer use. He developed a software-based solution—often distributed as a freeware/shareware Windows application—that, when paired with a simple serial or USB-to-ALDL cable, could perform miracles. His tool demystified the $EE, $8D, $42, and $58 masks used in GM vehicles from the mid-80s to the mid-90s.
| Tool | Mode 22 Support | Price | Ease of Use | |------|----------------|-------|--------------| | Terry’s Tool | Yes (older GM) | Free | Moderate (requires PC) | | Tech 2 | Full | $500–2000 | High | | Autel MaxiDiag | Partial (some PIDs) | $500+ | High | | Torque Pro + custom PIDs | Limited (requires manual PID entry) | $5 | Medium |