Question about 2004 Chevrolet TrailBlazer

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Gas gauge constantly on empty, check engine light not on,

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Problem can be one of two things, a bad sending unit in the gas tank or a defective stepper motor in the instrument cluster. All gauges, speedo and tach are driven by stepper motor that have been known to fail. A technician using a scan tool can determine if the tank sending unit is working.

Posted on Sep 11, 2010

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