Figured I'd start a 1997 Vortec Specific thread for TunerCat OBDII info.

Couple questions as to how TC handles Fuel and Air Diagnostics? There's options to report, not report, no error reporting (Type X) etc, but also a Check Box? Would this box just turn it off?
Specifically for Post Cat O2 Sensors.

Found the PE delay!

Tips and tricks?

Working on 388 cubic inch = stroker with .060 over bore and small cam.