14+ GM Trucks/SUV flex fuel conversion

Complete kit required to convert your 2014+ 4.3/5.3/6.2 truck to run any combination of pump gas and ethanol blends. 2014 4.3/5.3 have flex fuel standard, 15+ was an option on 4.3/5.3 engines. Use this kit in conjunction with our mail order or full tuning service, to see gains in excess of 40whp and 40ft/lbs.

Note: Product can be installed prior to tuning with no check engine light or performance issues, tuning is required prior to running ethanol fuels. Combine this kit with our Full Tune, Mail Order Tune, or Remote Tuning services to maximize your vehicle performance.

For more info check out our project pages 5.3 L83 Flex fuel conversion and 6.2 L86 Flex fuel conversion


  • O.E GM fuel composition sensor (modified to install on the fuel feed line)
  • Wiring extension harness
  • Complete instructions
  • Fuel line clip spacer
  • Easy installation 1-1.5 hours

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