XDF files are for use with TunerPro software. TunerPro is basically freeware - a small donation is all it costs. To log data using TunerPro requires a corresponding ADX file.

TunerPro will not flash (read / write) an LS1 style PCM. It is editing software. People will use various means to flash the PCM.

XDF files for the LS1 PCM (0411) have been around for a number of years, thanks mainly to Dimented24x7.

The original XDF files for this PCM were actually a series of smaller XDF files (you would load an XDF file to adjust the Fuel System parameters, then you would have to load a different XDF file to adjust the Transmission parameters).

I created one large, all encompassing XDF file, then did my best to make it look a little more like a commercial tuning software. I also incorporated all segment Checksum calculations.