2004 Chevy Tahoe FUEL GAUGE MALFUNCTION

2004 CHEVROLET TAHOE
120,000 MILES • V8 • 4WD • AUTOMATIC
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JFINDARLE
  • MEMBER
  • 1 POST
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.
Aug 26, 2008 at 7:59 AM
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BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
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.
Aug 26, 2008 at 11:12 AM
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