Erratic Fuel Gauge Operation on Cadillac DeVille

It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.

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Average mileage: 122,165 (12,600–260,000)
11 model years affected: 1992, 1994, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005
161 people reported this problem
76 people shared problem details
2003 Cadillac DeVille128,000
Fuel sensor seems to report accurate from full tank to just under half a tank. Then it starts going up towards full again as the tank further empties.
my car can be bone dry in fuel, but the dash shows full or half tank.
2000 Cadillac DeVille130,000
Had to have fuel sensor replaced.
2002 Cadillac DeVille153,435
Fuel gauge does not work properly shows full most of the time can't afford to have fuel pump to be pulled out of the gas tank
2000 Cadillac DeVille111,000
guage reads true (I think)when I turn key on but when the car starts the guage will read full and not move till car is turned off-hv not been able to fix or hv fixed-any ideas ? loumenn
Fuel Sensor reports inaccurate fuel levels.
2001 Cadillac DeVille115,000
2002 Cadillac DeVille129,000
when is full tank it shows ok, as it go empty it starting to show is full tank, dtc P0463.
1998 Cadillac DeVille148,746
It goes to full to Empty idk how much gas is in it.. I just wanna know how can I fix this problem
Replaced rheostat in the fuel sending unit.
2003 Cadillac DeVille160,000
Gas gauge reads full when empty and shoots back and forth.never know how much fuel is really in there
2003 Cadillac DeVille118,000
already replaced fuel filter, but she still wants to stall...gonna replace entire pump next...??????
fuel indicator is not reliable
2003 Cadillac DeVille155,000
When the gas gets low the needle jumps to full tank only when the gas gets low below 1/8 of a tank
1999 Cadillac DeVille145,000
Been like this for over a year. I go by gal of fuel used window.
2004 Cadillac DeVille170,365
Replaced fuel pump & sensor to cure common erratic fuel readings. Now fuel economy has dropped from about 26/27 to 21/22mpg & fuel gague is accurate. Problem ??
2001 Cadillac DeVille117,000
Fuel gauge shows full even when tank is empty. What is likely the cause?
1999 Cadillac DeVille190,000
Digital fuel gauge is erratic
that fuel gauge reads anywhere from 6 gallons to F then back to E no matter what, but still tells flashes E multiple times when I really am out of gas
2004 Cadillac DeVille116,333
Fuel Level doesn't show correct amount of fuel. We just use the single trip gage and on the information panel we also use 'fuel used' and reset it when we fill up the car. Works for us!
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