Well not today, a couple days ago. I ran the GXP out of gas,
(RED FACE). The trip meter said I had 47 mile of fuel left at 28.5 mpg. Well I ran out at 43 miles at 28.7 mpg. So I walked 1\4mile to the gas station, buy 2gal. can & gas. Walked back to the car, put 2 gal. in & drove back to the gas station & put another 12.5 gal. of gas to fill. That 14.5 gal. I thought the tank held 13.9 gal.

Looks like the gas pick-up, suck almost every drop from are tank. 2gal, turned the low fuel light off, but when I get to the gas station a 1\4 mile later, it came back on. So it's safe to say when the light come on. You have only 2 gal. of fuel usable fuel left.
When I didn't make to the gas station, I just

& said to myself, the data said I should of had enough gas, but it looks like the data was corrupted

Mike