I'm trying to diagnose a vehicle for a friend that has a possible bad ecm. I would like to overwrite a 1250216 OS with a 1250219 OS without bricking...
Before I jump in, I'm not a professional tuner and I just love old gmt800's. I don't plan to tune for the public, don't wanna tune for the public and...
Built LS3 has already been tuned on 93oct, which I will be adding a flex fuel sensor. I only want to change the flex tables without re-tuning VE and...