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1997 Buick LeSabre Question: Innacurate fuel guage 1997 Buick LeSabre

 

Question

Bigmark67, Madera, CA, October 12, 2013, 18:39
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My gas guage on my 1997 Buick LeSabre is innaccurate and reads full most of the time. Everything else on the dash works fine. Any ideas?

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  • Answer #1

    ebans777 October 12, 2013, 19:00
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     Master

    usually when fuel gauge sending unit not working you need to replace the whole fuel pump assembly they are together.

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  • Answer #2

    Rojo1 October 13, 2013, 06:42
     Technician

    Is it reading full or is it reading past full? It may be a faulty gauge sending unit but in general, when a fuel guage signal wire shorts to ground, the gauge needle will read past full or 'pegged'. Do you have a lot of miles on the car?

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    Bigmark67, October 13, 2013, 07:42
     Rookie

    70,000 original miles, will have to see if it is pegged or not, think it just reads full until the car is empty then it reads less than full but never reads empty.

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    Rojo1, October 13, 2013, 14:07
     Technician

    In that case the sending unit is probably faulty. The sending unit can be replaced separately but at 70,000 miles I would recommend replacing the entire pump and sending unit assembly.

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  • Answer #3

    pushrod October 13, 2013, 08:07
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     Master

    Defalt gauge reading IS full, even if you unplug the sending unit. Open circuit, at one point, in the fuel level sensor attached to the fuel pump module is 'most likely' the problem.

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