Question about 2000 Buick Century

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2000 Buick Century gas gauge reads full all the time

2000 Buick Century gas gauge seems to read correct when car is turned on, but quickly reads full, even when it is almost empty.

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You're either looking at a short in the wire that goes to the fuel sender, or a bad fuel sender. If it was just a broken wire, it would read empty instead. The fuel sender is a permanent part of the fuel pump, so that has to be replaced as a unit.

Posted on Oct 20, 2009

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General Motors had alot of problems with fuel gauge sending unit cards in the fuel tank.You will have to most likly have to drop fuel tank and check and replace your sensor card assembly.

Posted on Sep 24, 2009

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1 Answer

Gas gage floats between empty an full


gauge in-tank probably your problems. You can test it at connector near fuel tank . there is 2 kind of gauge one is 0 to 90 ohms or 0 to 250 ohms. if the reading is not good then gauge is defect
hope it helps

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check the wiring on the sender unit , ground wire for good connection it masy be a gauge and resistor problem but I suspect it is in the wiring or the sender unit at the tank

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I have a 2000 buick Le Sabre. gas gauge does not work properly. i filled the tank and the gas gauge reads full. and it works properly past half. then it starts flucturating. i disconnected the gas gauge...


There are three possibilities. The gauge could be defective. The instrument panel voltage regulator could be bad or not grounded or (most expensive) it might be the sending unit.

Mar 11, 2011 | 2000 Buick LeSabre

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When im driving my 1999 Buick Century the gas gauge doesnt read right, it moves all the time and i never know how much gas i have. what could cause this?


I have a 1989 Park Avenue with the same problem. It's most likely a problem with the float in the fuel tank. Check and clean the wiring and connectors coming from the sending unit in the gas tank. If that doesn't help then you will need have the float and sending unit removed from the tank and replaced.

Dec 15, 2010 | 1999 Buick Century

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Replace the in tank sending unit.

Aug 02, 2010 | 2001 Buick Century

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Gm cars are common for having defective fuel tank sending units in the tank. Yours likely needs replaced.

May 17, 2009 | 2001 Buick Century

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Gas gauge


The sending unit in the fuel tank most likelt went bad. It is probably a coincidence that it happened at the same time as the oil change.

May 26, 2008 | 2003 Buick Century

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