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Faulty Fuel Level Sensor-2000 Deville

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I've encountered a problem with a faulty fuel gauge on my 2000 Deville,

VIN # 1 G 6 K D 5 4 Y 5 Y U 2 4 1 0 0 5 .

One minute the fuel gauge reads full, a few mile later it reads 1/4 full! I've been filling the tank every

250 miles to be safe until I can get the problem diagnosed.


Is there a way I can diagnose what parts are bad that doesn't require special test meters or tools?

Is the fuel level sensor part of the fuel pump, located below the spare tire?

Do I need to replace the entire fuel pump?

Thanks for any advice offered.

Steve M. im MD

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Before I bought any parts, I would check for a wiring problem in the harness where it connects to the fuel tank assemblies.

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  • 1 month later...

Yes I have not been able to get just the sending unit for the fuel gauge you have to by the entire pump assembly I have done 4 of them so far as I am a mechanic for a used car dealer in CT.

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