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: 122,198 (12,600–260,000)
11 model years affected: 1992, 1994, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005
171 people reported this problem
84 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.
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
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.
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
Fuel Sensor reports inaccurate fuel levels.
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
2002 Cadillac DeVille129,000
when is full tank it shows ok, as it go empty it starting to show is full tank, dtc P0463.
2001 Cadillac DeVille115,000
Replaced rheostat in the fuel sending unit.
2003 Cadillac DeVille118,000
already replaced fuel filter, but she still wants to stall...gonna replace entire pump next...??????
2003 Cadillac DeVille160,000
Gas gauge reads full when empty and shoots back and forth.never know how much fuel is really in there
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
2003 Cadillac DeVille154,000
Pump won't work nor gauge
1999 Cadillac DeVille145,000
Been like this for over a year. I go by gal of fuel used window.
2002 Cadillac DeVille131,000
Installed a new fuel pump, now the display that gives est. fuel mileage went from 20 mpg to .999 mpg. I should live so long.
Went from 1/2 tank to full, will it let me know when it low on gas aso check coolant light pops on every 15 -20 mins just bought car seller said she had it check and was told it was nothing to just hit the reset and it would turn off
when the tank is less than 1/2 full the gauge starts going back to full as the tank gets lower and lower
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