GM Ethanol Content Sensor
This is an OEM ethanol content sensor used by most modern GM flex fuel vehicles. It is the updated unit which supersedes the larger designs offered by most vendors (commonly re-badged as their own product). Simply splice this sensor into your factory return fuel line and connect a FlexConverter.com converter module to get realtime ethanol content readings and flex fuel operation on compatible ECUs.
Check out our universal bracket for this sensor here: Ethanol Sensor Universal Bracket