hanging connector on 16 GMC sierra

[Scumbucket]

I was hosing down the underside of my truck when I noticed this connector hanging. Anyone know what it is? It's on the drivers side frame rail.

 

[MonkeyMouth]

I have it too. No worries. Not sure what it's for.

Mine is attached to the frame with the grey clamp.

 

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[MikeNH]

Pretty sure it's the plug for the alcohol sensor on E85 trucks.

[Scumbucket]

Cool. I think I see that little gray clamp in the pic. Thanks guys.

[jetlife]

Flex fuel sensor harness. I converted my 16' 5.3l 8spd recently using it. My second favorite mod behind disabling AFM!

[TheBlackPearl]

It's not capped or covered?

wth?

[jetlife]

It's capped. The black GT150 connector is a dummy and does not have open ports.