Hello. I am a new user and have a 2005 Avalanche that I recently started to flash. I am using a 2004 Silverado Bin and the 603 OS with TunerPro. I have been able to flash and make changes as needed (fan temps, DTC's, etc) but am not able to get the fuel gauge to work correctly. It appears to be operating in reverse (shows empty when full and full when empty). I have inverted the fuel gauge calibration tables and cannot get any other response other than the opposite it is doing now. Anyone have any experience with this? Thanks!