Conrad, that awesome.... So are you running the old style or 2012 GM n newer? I have the 2012 model.Ok...the journey is on! I FINALLY got the GM Flex Fuel Sensor installed and connected to FAST XFI and installed ver 2.01 and running. I enabled the sensor with FAST software and added 2-3 gallons of E85 and, behold, the fuel constant dropped to 0.9xx so I know it is working!
Conrad