Question about 2002 Cadillac Sts

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Erratic Gas Gauge

The fuel gauge on my 2002 Cadillac Seville STS keeps bouncing around from full to empty and all stops in between. I would think it's a defective sending unit in the fuel tank. My question is: is there easy access to the unit under the rear seat or trunk or...do we have to remove the tank to get to the sending unit?

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  • voicepix May 29, 2009

    Interesting...as a matter of fact, the fuse to the fuel pump blew out about two weeks ago and I had no idea why. Could be related? How much does it cost to replace the fuel pump? Stealership price vs reasonable mechanic price any ideas?

  • Anonymous Mar 19, 2014

    Is there an access panel in the trunk of a 91 Lincoln to be able to get to the fuel pump in the tank, or does the tank always have to be removed?

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  • Master
  • 1,392 Answers

You need to remove the tank and replace the fuel pump as the sending unit is part of the pump assembly.

Posted on May 29, 2009

  • Eldric Venne
    Eldric Venne May 29, 2009

    Fuel pumps for GM generally run high due to the complexity of the units. Figure between $300-600 at least.

  • jcha Jun 19, 2011

    Sorry, You are wrong, you do not have to remove the tank, there is an access hole under the rug in the trunk.

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1 Answer

Guages not working,


If all voltages checked ok,then most probably its faulty instrument cluster board on which gauges are connected.Yes if cluster circuit board looks ok,then also it can be faulty.Somewhere there is minute short or burn on board then such prolem arises.
Also check the fuse box.One under hood and other under dash.Inspect each and every fuse and see if all are fine or not.
---------------For more troubleshooting on these cluster gauges i suggest you to refer the list of help links mentioned below.Its step by step instructions will help you to confirm the exact cause of problem in these conditions:---------
Click the link below:------

2004 Toyota Tundra: Oil Gauge and Temp Gauge Not Working?

http://howtobyme.blogspot.in/2012/05/2004-toyota-tundra-oil-gauge-and-temp.html

--------------

2005 Lexus SC430: Fuel Door, Dome light and Fuel Gauge Fuse Location?

http://howtobyme.blogspot.in/2012/05/2005-lexus-sc430-fuel-door-will-not.html
----------

Toyota 4Runner: Temperature Gauge Sensor

http://technoanswers.blogspot.in/2012/04/toyota-4runner-temperature-gauge-sensor.html
------------

Temperature gauge sits over half way mark?

http://schematicsdiagram.blogspot.in/2012/04/temperature-gauge-sits-over-half-way.html

---------------

Heater blows intermittently and temp gauge goes erratic?

http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

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Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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2003 Pontiac Grand Prix: Erratic Fuel Gauge?

http://technoanswers.blogspot.in/2012/06/2003-pontiac-grand-prix-erratic-fuel.html


-----------

Temperature gauge keeps fluctuating up and down close to red?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-keeps-fluctuating-up.html


-------------

Temperature gauge on the dash quit working on Pontiac Grand Prix?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-on-dash-quit-working.html

---------------

Fuel gauge jumps from empty to full?

http://schematicsdiagram.blogspot.com/2011/12/fuel-gauge-jumps-from-empty-to-full.html

--------------

Gas gauge stuck on empty on 2002 Mercedes Benz 240c?

http://repairhelpcenter.blogspot.in/2012/02/gas-gauge-stuck-on-empty-on-2002.html
---------------

Oldsmobile Temperature Gauge Lamp Switch?

-----------------


Fuel gauge drops to Empty?

http://technoanswers.blogspot.com/2012/01/fuel-gauge-drops-to-empty.html

----------------

Dodge neon gauges not working?

http://technoanswers.blogspot.in/2012/02/dodge-neon-gauges-not-working.html

------------


Temperature gauge went up?

http://schematicsdiagram.blogspot.com/2011/12/temperature-gauge-went-up.html

------------

Temperature gauge stays At cold on jaguar?

http://technoanswers.blogspot.in/2012/02/temperature-gauge-stays-at-cold-on.html
-----------


How to replace Instrument panel and dashboard on Toyota car?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-instrument-panel-and.html

-----------

How to remove instrument panel on Chevrolet car?

http://technoanswers.blogspot.in/2012/02/how-to-remove-instrument-panel-on.html

-----------

How to remove control panel on Buick regal?

http://howtobyme.blogspot.in/2012/02/how-to-remove-control-panel-on-buick.html
---------------
These details will help.Thanks.

Nov 28, 2012 | 2000 Mitsubishi Lancer

1 Answer

No guages working


If all voltages checked ok, then most probably its faulty instrument cluster board on which gauges are connected. Yes if cluster circuit board looks ok, then also it can be faulty. Somewhere there is minute short or burn on board then such problem arises.


Also check the fuse box. One under hood and other under dash.

Inspect each and every fuse and see if all are fine or not.


---------------

For more troubleshooting on these cluster gauges I suggest you to refer the list of help links mentioned below. Its step by step instructions will help you to confirm the exact cause of problem in these conditions: ---------


Click the link below: ------


2004 Toyota Tundra: Oil Gauge and Temp Gauge Not Working?

http://howtobyme.blogspot.in/2012/05/2004-toyota-tundra-oil-gauge-and-temp.html

--------------

2005 Lexus SC430: Fuel Door, Dome light and Fuel Gauge Fuse Location?

http://howtobyme.blogspot.in/2012/05/2005-lexus-sc430-fuel-door-will-not.html

----------

Toyota 4Runner: Temperature Gauge Sensor

http://technoanswers.blogspot.in/2012/04/toyota-4runner-temperature-gauge-sensor.html

------------

Temperature gauge sits over half way mark?

http://schematicsdiagram.blogspot.in/2012/04/temperature-gauge-sits-over-half-way.html

---------------

Heater blows intermittently and temp gauge goes erratic?

http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

----------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

2003 Pontiac Grand Prix: Erratic Fuel Gauge?

http://technoanswers.blogspot.in/2012/06/2003-pontiac-grand-prix-erratic-fuel.html

-----------

Temperature gauge keeps fluctuating up and down close to red?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-keeps-fluctuating-up.html

-------------

Temperature gauge on the dash quit working on Pontiac Grand Prix?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-on-dash-quit-working.html

---------------

Fuel gauge jumps from empty to full?

http://schematicsdiagram.blogspot.com/2011/12/fuel-gauge-jumps-from-empty-to-full.html

--------------

Gas gauge stuck on empty on 2002 Mercedes Benz 240c?

http://repairhelpcenter.blogspot.in/2012/02/gas-gauge-stuck-on-empty-on-2002.html

---------------

Oldsmobile Temperature Gauge Lamp Switch?

-----------------

Fuel gauge drops to Empty?

http://technoanswers.blogspot.com/2012/01/fuel-gauge-drops-to-empty.html

----------------

Dodge neon gauges not working?

http://technoanswers.blogspot.in/2012/02/dodge-neon-gauges-not-working.html

------------

Temperature gauge went up?

http://schematicsdiagram.blogspot.com/2011/12/temperature-gauge-went-up.html

------------

Temperature gauge stays At cold on jaguar?

http://technoanswers.blogspot.in/2012/02/temperature-gauge-stays-at-cold-on.html

-----------

How to replace Instrument panel and dashboard on Toyota car?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-instrument-panel-and.html

-----------

How to remove instrument panel on Chevrolet car?

http://technoanswers.blogspot.in/2012/02/how-to-remove-instrument-panel-on.html

-----------

How to remove control panel on Buick regal?

http://howtobyme.blogspot.in/2012/02/how-to-remove-control-panel-on-buick.html

---------------


These details will help.

Thanks.

Nov 28, 2012 | 2000 Mitsubishi Lancer

2 Answers

My 2006 cadillac fuel gauge suddenly stopped working and is stuck on empty any suggestions?


drop tank change sending unit,check for bad ground,bad gauge,most likely its sending unit bad

Jul 21, 2011 | 2006 Cadillac STS

2 Answers

The gas gauge is erratic. It bounces from full to mid way to empty. Especially when it is low on fuel, but not only. On a full tank, it works fine until the tank is about half empty, then erratic.


This is a failure off the tank sensor .The potentiometer with the float on the tank would have resulted in wearing OFF and so when it comes to the half part there is not connection of the resistance coil to the potentiometer resulting in this erratic action.
So change the float chamber assembly on the fuel tank. Make sure that all connections are tight.

Wishing you a Happy and Prosperous New year.

Dec 31, 2010 | 1999 Chevrolet Astro

3 Answers

Gas gauge is not reading correctly. Shows a full


the problem is caused by a defective gas gauge sending unit, this part is located inside the gas tank, you must remove the gas tank to replace it.

Dec 02, 2009 | 2002 Cadillac Deville

1 Answer

Fuel gauge not reading properly


alot of cars do the same thing.when the gas guage is below half, it goes down faster.

Jun 28, 2009 | 2002 Cadillac Sts

1 Answer

Temperture gauge


It's either a loose wire on the sending unit, or the sender itself. Or i suppose it could even be the gauge, but i'd bet on the one of the other 2.

Jun 04, 2009 | 2000 Cadillac Seville

1 Answer

1999 GMC Sierra fuel gauge is erratic


the fuel level sensor inside your gas tank might be defective
you need to drop the tank and check the level sensor

Apr 02, 2009 | 1999 GMC Sierra

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