Question about 1990 Buick LeSabre

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90 buick lesabre my gas hand is stuck on full

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Mine has done this. The connector to the instrument cluster connects to the printed circuit at the back of unit. Over time the copper on the printed circuit will fall apart. This will cause the fuel gage to give a false reading and sometimes the same with the speedometer. You will have to remove the upper dash cover to remove the cluster. Be careful to un clip the shift indicator cable at the base of shift bowl. Repair the contacts and clean them. You may have to glue them back in place somehow or get a doner cluster.

Posted on Feb 12, 2010

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THIS PROBLEM IS DUE TO A DEFECTIVE GAS TANK SENDING UNIT

Posted on Feb 03, 2010

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Its your sender unit. the sender unit is attached to your fuel pump it measures the amount of fuel in your tank and sends it to your fuel gauge. on most cars you can get to the fuel pump by looking under the rear seat if you find a plate with bolts around it you can easily access your fuel pump through there.

Posted on Feb 03, 2010

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1 Answer

Gas hand moves from full to empty by itself


check out buick lesabre gas gauges repair on youtube they have alot of helpful hints

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sounds like you have a bad ground in your dash where your gauges are located should come out as cluster check for loose wire!

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My gas guage stays on empty and the tank is full


Sounds like your senor in the gas tank it self is bad. Most cars have a float that read out how full the tank is and when it goes out it will stay stuck showing you on the dash that your tank is empty even though it is full.

Nov 03, 2010 | 2000 Buick LeSabre

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mcdevito75 here, Hello john, the sending unit in the gas tank could be faulty of stuck, try leaning against one of the back fenders to move the body of the car from side to side to try to free up the sending unit. You may have to live with it unless yoyur local shop changes the sending unit in the gas tank.

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