i have segment swapped another p59 pcm in my l33 swapped volvo to a 80e and flex fuel with no issues, I now have a 2006 rcsb silverado that id really like to add flex fuel to, it accepts the 80e segment swap no problems as a test. is there something weird with this year that makes adding a content sensor difficult? what could i be doing wrong? i have never had issues with segment swapping before. i have read that in 06 it flex fuel was virtual flex fuel? my factory pcm has nothing enabled and i havent found a single file flex that will let me swap it over. Any help is greatly appreciated!