1999 GMC Suburban Gas gauge not working after replacing fue

1999 GMC SUBURBAN
88,000 MILES • V8 • 4WD • AUTOMATIC
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JOE1952
  • MEMBER
  • 1 POST
My mechanic replaced fuel pump assembly on Friday. Fuel tank was full when pump quit. He relaced gas in tank after repair. He started vehicle and gauge went to full--a few seconds later it went to empty. When you turn ignition on, gauge moves a millimeter or so and falls back to past empty. Truck runs fine -- but no gauge reading. He hooked up scan tool and says computer indicates that tank is 98% full, which should be accurate. He thinks gauge itself may be faulty, and wants to remove gauge cluster-send it off--and have it tested. I dont believe in that kind of coincidence - considering the gauge has always worked smoothly and worked after the pump quit. Any suggestions would be appreciated. Joe
Oct 4, 2010 at 5:00 PM
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SATURNTECH9
  • ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
First of all thank you very much for your donation.If the gas gauge worked before the fuel pump was changed then i would think something got messed up when it was changed.Do you have any code's?Also which model do you have?The C or K model?
Oct 4, 2010 at 5:23 PM
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