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Q: gas guage erratic on 2002 Buick Rendezvous

goes from to full to empty never know if its full or empty
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Classic fuel sending unit failure. Need to replace the unit, it is of course in the fuel tank. http://www.autozone.com/autozone/accessories/Performance/Gauge-Sender/_/N-269r?filterByKeyWord=fuel+gauge+sending+unit&fromString=search
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