why does my gas gauge needle constantly move on my 88 chevy 2500 pickup?

  • Thread starter Thread starter John The Duke
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John The Duke

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The gas hand shows full when tank is low and constantly moves when tank is half full so that I never know how full my tank is.
 
Sounds as if the float is bobbing around as the petrol sloshes to and fro while you're driving.
 
It's the sender unit, usually inside the gas tank. It can be an expensive fix because the tank has to be dropped out of the car to get to it.
 
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