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2004 Chevy Tahoe FUEL GAUGE MALFUNCTION

Tiny
JFINDARLE
  • MEMBER
  • 2004 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
About 6 months ago we started running out of gas when fuel gauge showed 3/4 of a tank. The vehicle would be driven to our driveway, but then would not re-start without us putting in 5 gallons of gas. Now the problem has escalated to out of gas at 1/2 tank showing.
Not sure if we have a bad gauge, sensor in tank. Pleae advise where to ck.
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Tuesday, August 26th, 2008 AT 7:59 AM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Since its erratic like that I would really suspect a bad sending unit, you can take and add a + volt to the singal wire on the harness tank shoudl show full add negative 12 it should show empty.

If that works properly then the sending unit in tank is bad.
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Tuesday, August 26th, 2008 AT 11:12 AM

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