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1999 Pontiac Bonneville Faulty Gas Gauge

Tiny
JPMUCHOW
  • MEMBER
  • 1999 PONTIAC BONNEVILLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 22,700 MILES
The gas gauge is no longer accurate. After the gas tank is filled, the gas gauge stays on full for at least 100 miles, then it starts to move toward 1/2 and then randomally moves from 1/2 to full. Is this an electric sensor that has malfunctioned and what can be done to replace the sensor?

Thanks.
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Monday, August 30th, 2010 AT 9:43 PM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Your vehicle uses a fuel level sending unit which is on the top of the fuel tank. Remove the spare tire and carpeting/trim from the rear compartment area and you will find an access panel to the top of the fuel tank.
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Monday, August 30th, 2010 AT 9:54 PM

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