Flex Fuel Information Wanted

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Vbb199

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Hey all.

I know this isnt really squarebody related, but i am looking for some information... perhaps someone here has a flex fuel vehicle they own and could give me some input.
Out of curiousity, does anyone have the working voltage range on input and output for these flex fuel sensors?

I know the 2nd and 4th one are both for GM... the connectors are all the same, the pipe diameters change....

13577429 , 13507128 , 13507129 , 13577394

The 2nd one seems to be easily found on amazon for 56$ with a connector for 10$

Any info would be appreciated.

Everything ive read seems to suggest that the 13577394 is 3/8" input and output gas line, and has a 5v signal
 

Tank6x2

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5v is usually a signal wire voltage, 12v usually- diameter may actually be the only difference between generations
 

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