We had to ask someone on the gauges, not our field. The SC gauges have ability to read percentage or gallons. On a 2006 Puma you need to read those as gallons, as your rear and front are different volumes. The set up is in the SC manual, and you probably can toggle your way through the setup without the manual since yours are already off. Though if you have the manual it is easy. You do this when fueling on the trailer. BCB Team