Gm Mode 22 Scan Tool By Terry Now

“If you own a 1998–2013 GM truck and want to see exactly what your ECM, TCM, and ABS module are doing – without spending $1,000 on a Tech 2 – Terry’s Mode 22 tool is a must-have. It’s not pretty, but it works.”

| Feature | Benefit | |---------|---------| | Reads 100+ GM-specific PIDs | Injector flow rates, fuel rail pressure desired vs. actual, EGR position, fan clutch duty cycle | | Works with cheap ELM327 v1.4+ | No expensive Tech 2 or GDS2 required | | Logging & graphing | Compare data over time, diagnose intermittent issues | | Free / low cost | Often available as a downloadable .exe | | No internet required | Works offline once installed | gm mode 22 scan tool by terry

It allows a scan tool to request individual Parameter IDs (PIDs) directly from a module at a much faster refresh rate than generic polling. This is critical for intermittent problems and dynamic drivetrain behavior. “If you own a 1998–2013 GM truck and