Question about 2000 Buick LeSabre

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Gas gage stays on full - 2000 Buick LeSabre

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  • moejanus2000 Oct 02, 2010

    Thank you for your advice i appreciate your answer.

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Hi, Generally there are only 3 solutions to this prob. The fuel sending unit, (fuel tank level sensor in the tank), and the fuel gauge. Judging from how you described the problem, I would put my money on the sending unit. Usually, when the gauge goes bad, it either registers empty all the time, or doesn't move at all where ever it is. They're both a pain in the rump to replace, since you either have to drop the tank to replace the sender, or tear out half the dash to get to the gauge. There are however 2 ways to check the gauge, which should eliminate one of the 2. Disconnect the sender wire, (in a harness near the tank) and see if the gauge goes to empty. If it does, it's probably ok.... You said when it's full and empty, it reads full, right? If so, it's the sender.......the other way is by using an ohm meter........However, you need to know what the readings are in order to figure out if it's (an outside chance) a wire grounding somewhere it shouldn't, or the gauge that's causing too much resistance...

Summarily, the fuel gauge is not making contact with sending unit in the fuel tank or the fuel gauge sending unit in the fuel tank is bad.

Posted on Oct 02, 2010

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