Erratic Fuel Gauge Operation on Pontiac Bonneville

It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.

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Average mileage: 136,975 (40,000–227,000)
8 model years affected: 1991, 1999, 2000, 2001, more2002, 2003, 2004, 2005
42 people reported this problem
19 people shared problem details
The guage will show that I have more gas than I actually do.
Fuel gauge swings back and forth when it shows 1/2 full. When full tank reaches 1/2 mark it starts jumping around. I set the "fuel remaining" readout and when it show I only have 2/3 gallons left I fill up. Too costly to replace sensor & fuel gauge! Otherwise great car.
The gas gauge does not read the fuel level correctly, so I have to use my trip reset to give me an estimate as to how much fuel I use before I fill it back up. This car is a lemon...way too many problems to count!!!!!!!!!!!!!!!!!!
gas guage does not read, i replaced the cluster, fuel level sensor, and the complete fuel pump assembly. when you start the car the fuel guage jumps to full and after about 15 seconds it goes to empty. the car has about 3/4 tank of gas in it. don't know what else to check out.
Fuel gauge no longer relates to amount of fuel in tank, told it was part of the fuel pump which would need replacment.
This car has a lot of problems with the Fuel gauge/ fuel pump. There's kits you can buy to replace the gauge sender or the the fuel pump, but since it's common for both to go, you might as well change the whole unit since you have to open up the access panel in the gas tank anyways.
just bought this car awesome but it left me on way home thought it was full and car data indicted it had 306 miles to empty so drove my merry way only to have to walk a mile to get gas.not sure if its a gauge problem or fuel pump
Fuel gauge gets to about half then goes to almost full then back to 1/4 @ about 13 gallons used
gas guage drops to empty.
Fuel gauge registers over full or near empty when tank is 20% to 90% full. Have to monitor fuel level by mileage. What a pain!!!
My fuel tank guage will read 3/4 full when I park it on the lot in the morning at work. When I get ready to leave work it shows 1/4 full?? Thought someone was siphoning my gas! I buy a 91Pontiac Bonneville in December for $200 and a New Car Battery for it since it was left to sit for 6+ months. First time I drive it I notice that the fuel gauge kept moving up and down...I think nothing of it til the car stalls in 2 weeks ago on me. I've replaced the wires the alternator, even fuel injectors, battery won't go past the halfway mark the battery keeps going out have to take it out to charge at autozone even cleaned the crankshaft position sensor. I'm steadily trying to diagnose the engine. I lf an
I don't think it's always accurate or else the sensor is floating around ("fuller" tank when going uphill, "empty" tank going downhill). I just reset the gas mileage each time I fill up.
Fuel gauge does not read correctly. Pontiac Bonneville
Car doesn't run well when the ac is on, or when we drive uphill. It struggles to fire up when you turn it off a lot of times.
Fuel gauge went haywire. Fuel take sensor had to be replaced. $174 just for the parts.
Fuel take reads incorrectly
fuel gage reads all over and the digtal gages not reading right. 2005 pontiac bonneville GXP
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