i am trying to be able to run a flex fuel sensor on a 0411 ecu not having any luck i have the 02 tahoe but my setup is a 02 sierra 6.0 with 4l80e. all i want to be able to do is turn on the flex fuel option but it is only available with the 5.3 4l60e. does anyone have an idea on how to do this if it is even possible. i just dont want to run two different programs but will if i have to. thanks guys