Question for you: have you seen GallonsOfGas values below 1.0?
After 9 months on the same tank, I'll be running out of gas tomorrow. I'm purposely running it dry to test out "limp mode" behavior. Tonight, while I still have a bit of gas left, my downloaded data set is telling me that GallonsOfGas is 0. Not 0.5 or something, a perfect zero. I'm wondering if this "0" behavior in the data is tied to the "Low" indication on the dash when the tank is close to empty.
Hmmm, no, actually now that I think of it, the Volt was displaying "Low" on the dash for the last week or so but my data feed said GallonsOfGas = 1.17 . It was only today after I burned most of that remaining gas (but NOT all of it) that it reads 0.
Have you seen all values between 0 and 1, or do they cut off at some low value? Of course it's possible that I'm literally right on the edge of running out, between the bottom two resolution points of the fuel gauge in the tank-- or below it!
And does that number come straight from OnStar, or do you have to reverse engineer it?