Efx

Was wondering if anyone in GTA has access to Tech II, HPTuners or similar snap-on tools that can reset Fuel Composition and Fuel Trim in PCM. (unplugging the battery will not work)
My impala is reading high ethanol % (35%) and running very rich reporting P0172 code. New upstream 02 sensor, cleaned MAF, clean air filter, no vacuum leaks.

Thanks.
Max.