Fuel Gauge Issues 2003 Bonneville - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-28-2010, 12:43 AM   #1
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Default Fuel Gauge Issues 2003 Bonneville

My mom has a 2003 Bonneville and is having many of the issues listed on this site. The issue today is the fuel gague is intermittent and generally sporadic. The question I have is the car has 100K miles on it and should I replace just the level sensor or the complete fuel pump module. I have a GM car as well (Olds Alero) and had to replace the fuel pump at 110K. I am afraid that if a just replace the sensor, I will be cracking the tank open again to replace the pump in the near future. The cheapest I have found the sensor is $75 and I can ge the OEM pump module (including sensor) for $250. Any thoughts?

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Old 12-28-2010, 12:47 AM   #2
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Might not be a bad idea to replace the whole pump if it'* getting that old. Replacing the pump in that car isn't all that hard. There'* a access door in the trunk, so you don't even have to lower the fuel tank.
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Old 12-28-2010, 12:51 AM   #3
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I guess my question is anybody aware of having to replace a fuel pump in this family of cars and at what mileage?
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Old 12-28-2010, 12:54 AM   #4
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Many of us have replaced fuel pumps, but at what point, I can't say for sure. You can do a fuel pressure test, if you have 48-55 with KOEO then the pump is fine. If it'* lower then that, then the pump is getting tired.
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Old 12-28-2010, 02:16 AM   #5
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mine lasted 247k hehe but i was lucky lol
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Old 12-28-2010, 10:12 AM   #6
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i replaced mine for a faulty gauge reading at 16x,xxx had to get the whole pump as the level sensor was no longer available separate cost me $350 at GM just for the pump and i installed it myself
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