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Flex Fuel Conversion

Stonehenge
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Supermofool Enthusiast

Supermofool

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Bringing this thread back: My truck is a 2015 sierra with an early build date in Aug 2014. The truck has a factory flex fuel sensor and i just took it to someone with HP tuners to see if the sensor was active.  "Flex fuel" was Enabled but the sensor was set to virtual. what would everyone recommend? I think i am going to buy HP tuners and check the stoich table to see if it is 14.7 across the board or if it has a FF tune in it

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SinisterZ71
SinisterZ71

I've got a 2018 Silverado K1500 extended cab short bed that did NOT come with the flex fuel option.   I ordered a Continental brand flex fuel sensor p/n: 13577429 and Flex Fuel Sensor Rear l

CamGTP
CamGTP

Yes, the sensor and a tune will allow you to run E85.   Once everything in the computer is enabled it will work as if it came that way from the factory.   I'm currently running som

Mike GMC
Mike GMC

Besides the fuel sensor, what comes in the "kit"?  Why not just buy GM OEM parts?  They seem to work pretty well.

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