So i did some searching here and on hptuners and sloppywiki. I am trying to get my content sensor up and going. First i flashed a custom os 040730003 in then flashed a 04 tahoe with flex enabled cal. Read it out. Did segment swaps from the old os that had flex turned off. Full flashed that in. Pin A is flex input pin 59 blue connector Pin B is ground. Pin C is 12v switched power. The sensor is a continential style from ecumaster.com came with a nice 6ft pigtail. Turn the key on and percentage is stuck at 0% i have a 26 gallon tank has 22gal of 91 and 4gal of e85 just to test. Figured id start with a small amount of e85 just in case near as i can tell assuming im getting E70 (.70x4=2.8gallons of pure ethanol) so (2.8/26=10.7%) so i should be seeing at least 10% on the scanner correct? Any help would be great!