Question about 2006 Chevrolet Uplander

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Low Fuel light is on but I just filled the tank. I have noticed that often when my tank is just filled and I do city driving - the tank guage goes as low as half full. Wonder what the problem could be?

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  • Chevrolet Master
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Gage sending unit in the tank is failing.

Posted on Sep 02, 2010

Testimonial: "Yes I found it to be a $159 part. The Fuel Sensor in the tank. $272 labour."

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Posted on Jan 02, 2017

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1 Answer

88 mustang fuel only works for the top half of the guage?


The most likely problem is the fuel level sending unit in the fuel tank. It is a rheostat that is hooked up to a float in the tank. When the tank is kept at 1/2 tank or less than the rheostat stays at that spot and makes a open in the circut. When the circut is open or the resistance is low the guage goes towards full. When she fills it up the float rises to a spot on the rheostat that is not warn yet and works. The fix is to replace the fuel level sending unit in the tank or use the trip odometer to log how far she has gone on a full tank.

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My gas needle stopped working. how will i know if gas tank is empty. If van sits in park and running the needle drop to E and the low fuel light comes on, then when you drive it goes back to a full tank....


You can take out the part of the dash where the guages are and change the little sensor/fuse behind the fuel guage, they should have a replacement part at orileys or autozone

Jan 09, 2011 | 2001 Pontiac Montana

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Just filled the gas tank in my 2006 f-350 turbo diesel super duty (6.0), started the truck and the guage showed a full tank. Drove down the road about 1/10 of a mile and the guage dropped to dead empty...


A loose connection on the sending unit could cause the problem but also moisture in the tank in cold weather could also be a factor in which i would add fuel line antifreeze to a full tank of fuel..........Hope this helps you out.

Dec 17, 2010 | Ford F-350 Super Duty Cars & Trucks

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My fuel guage got below a half tank at about 3/8


1999 fuel pumps are located within the gas tank on this model and use a float assembly to send fuel levels to the dash gauge. This is why you may notice that parked on a hill or with sudden stops you car shows a little more or less fuel and then settles. It shouldnt go up and down as drastic as you describe so that makes me feel that the sending unit on the fuel pump is going bad. It looks like a half circle of contacts and as the float arm goes up each contact causes a different reading.. think clock face and clock hands. Watch it carefully now that you have filled it up and note when it gets to same range you were in before. If you see same problem it could be a failure.. if not then its possible a piece of debrs wash causing an intermittent failure. Unfortunately on these models the fuel pump and replacemetn is a lengthy process. You must drain the tank, remove it from vehicle and remove pump. insert new one and then do a pressure check at engine block as these new pumps have to maintain about 90PSI pressure to the fuel delivery system. Its not a weekend DIY fix to do this repair and if you see the issue its best to leave this job to a dealer or reputable service facility.

Jun 03, 2010 | 1999 Chevrolet K1500

1 Answer

Concern about the computer system, little things like the date when set on the system won't hold or when turned off date will change.Alsofuel tank gage after filled will show empty and the gage will bounce...


Hi- The computer 'system' is actually 4 or 5 modules, or controllers tucked into the dash, under the backseat, and in the engine compartment. First, the clock is easily affected by momentary drops in voltage or loose connection at battery. The monster battery installed in the Aurora is expected to run a small city, but have it tested to eliminate it anyway. As far as the fuel guage goes.... notorious for dropping like a rock below 1/2 tank. Guage is not controlled by computer but sends low fuel signal when float bottoms out. I have owned a 95 'Ourora for 8yrs... Please acknowledge this post if helpful. Have more info if needed- Thanks--Ed

Apr 23, 2010 | 1997 Oldsmobile Aurora

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I have 2005 GMC Envoy. I noticed the gas


The new design filler neck on newer gm vehicles don't have a flap. The flap was just to keep stuff from falling in. I've had problems with the fuel sending unit in the tank on these vehicles.

Jan 01, 2010 | 2005 GMC Envoy Xl

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Fuel guage not working correctly


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Sep 12, 2009 | 2005 Chevrolet Malibu

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I have a 2005 Saturn Relay. Everytime we fill-up


Some of these GM's have a seperate fuel guage relay under the dash. Their not cheap. Since you could have anything from a bad sender in the tank to a bad relay its best to leave this to a professional. Next time this happens try smacking the fuel tank a few times hard. If the gauge goes up its most likely a sender in the tank issue. If nothing happens then it really needs to be diagnosed correctly.

Jul 14, 2009 | 2006 Isuzu Ascender

2 Answers

2001 Chevy Impala gas guage incorrect


The level sensor is bad. They are easy to do. You don't have to pull the fuel tank down. There is an acsess hole in the trunk. Look in the rear of the trunk at the rear of the seats. You will notice there is a spot in the middle that the capet comes together, Pull them apart and there is metal plate with some 10mm nuts, pull that off and your fuel pump is there, remove and replace the sensor.
Also there will the a code in the pcm. you will need to clear it to pass emissions

Jun 19, 2009 | 2001 Chevrolet Impala

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