sounds like you have a bad ground wire on frame by the fuel tank. small black wire coming from the fuel tank and screwed to the frame.
it proply your sending unit in your gas tank drive safeI am having the same promblem with my 2006 Trailblazer. The research I did on it points to the sending unit.
It would be better to write: My gas gauge reads empty. Note that 'gauge' is singular, so it needs the singular verb, reads. If you had several cars all with gas gauges that read empty, then the verb would be read.
you should go to a car shop for that one!:)
Float could be stuck in the tank or the ground wire on the tank is broke.
BUY A FORD
If the vehicle will stall and will not restart or appears to be out of fuel but the fuel gauge reads above empty, replace the fuel sensor assembly and auxiliary tank fuel level sensor if equipped. if not, replace the instrument cluster.
20 gallons- with 2 in reserve (when tank gauge reads empty). Plenty....! This is within a couple of tenths of a gallon; I don't have it in front of me at the moment. It is 17.6 gallons "on the gauge" and 19.4 counting 1.8 gallons "reserve" that doesn't show on the gauge (after the gauge hits empty).
my 86 did the same never would read more than 1/4 tank after lots of checking things i replaced the gauge and it worked perfect..
There could be a few problems....wiring issue, the gauge in the dash has gone bad, or the sensor for the fuel float is bad, id check wiring and the gauge first because sending units are expensive and can be a pain to change
i would recommend getting gas when that happens. perhaps take it to the mechanic to fix the gauge
take it to a local shop that reads codes for free... could be a sensor is out
You might plan to refuel when your fuel gauge reads one-eighth of a tank of gasoline. Some people choose to refuel when the gauge reads one-quarter of a tank remaining.