Do you have a fuel level sending unit hooked to the PCM and in the tank? I know the 9405 OS requires the fuel level to work with the flex fuel sensor. IIRC it does read the sensor, however, it does...

I have read that the 2003-2005 OS will work with the 2003-2005 TAC module and gas pedal. The 2006 was supposed to be updated and will not work with the 2003-2005 pedal or TAC module. The 2007 van...

I wanted to say than you for this site. I`m new to the open source GM tuning side of things, but not to LS series engines or tuning. I did my first EFI engine swap about 15 years ago. Thanks to...