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ii27376
    
anybody out there know how to wire up a gas sending unit for a GMC picup ?
I wiered a wire to the ingnition switch to the gas gauge ( ORIGINAL) and ran a wire to the sending unit . When i turn the key on the neddle jumps to full
quickly there is about a half a tank of gas in the tank i know its not full. any answers will be welcome.
posted: July 17, 2012
 
    
 
  Answers (3)
 
ii27376
    
what year
posted:  July 17, 2012
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23dodges10
    
The gauge has a ignition wire (key hot) and the other goes to the gauge, sending unit should also be grounded. I'd pull sending unit, keep it grounded and run the float up and down. The needle should move accordingly. Corrosion is a pretty big culprit with the gas these days.
posted:  July 17, 2012
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61pontiac
    
you need to run a ground wire from the body to the sending unit. There a place on the outside of the sending unit, that aspade wire conector goe's over. Any time that the fuel gauge stay's on full its a ground issue. Any time the gauge stays on empty, its a voltage problem. Good luck let me know, how it went. Good luck.
posted:  July 17, 2012
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