I like to get a idea, I have a 2000 GMC Yukon XL 5.3L and like to find out how long from the time the low fuel light comes on I got before out of gas? I like to know like a avg mileage and gallons left if there is avg between everyone who owns a 2000-2004 models, I guess a chevy in these years would be the same right? My vehicle is new to me so I do not got mine figured out yet. I got down to low light like one mark above the red empty mark. Some cars will go way down below that mark and I do not know if these vehicles are like that.