The 2011 Holden Commodore (G8 basis until Pontiac shut its doors, but coming back as the Chevy Cop Caprice) V6 and V8 flex fuel cars use a hard sensor (IIRC that may be all models for 2011). It can be purchased NOW as a spare at a GM/Holden dealer for the 2011 cars. The information, oddly enough, is accurate.
Really interested in how you manage to get better mileage out of E85 than gasoline when at stoich its flowing roughly 45% more fuel by weight.
VFS CAN be turned on in GM controllers. EFILive opened this door maybe 2 years back. It just doesnt want to work as it should. Even tried stock FF tunes and VFS wont run. So yes, there is an input missing as you mention that it needs to validate the process and then run the learn cycle. It uses both fuel level and fuel tank pressure to commence the cycle...though now I cant remember for sure whether I ran a simulation as well for the fuel tank pressure. Maybe I didnt. It was about a year back. Must swap the E67 out and put an E38 back in and give it shot again.
And as LS1Sleeper pointed out, just because something isnt available in the US, doesnt mean it isnt available somewhere else on the planet where the other 95%+ of the inhabitants of earth hang out. The rest of the world is not the 52nd and 53rd states of the US
, Chevy's are sold in the middle east (Dubai etc...they have cheap gas and a speed crazy...
), south africa, and the car the G8 was derived from is the largest selling car in Australia, and also exported to the UK and Singapore and middle east countries (Chevrolet Luminas), etc, in some forms.