Question about 2000 Oldsmobile Silhouette

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I got a 2000 olds intriuge, fuel gauge stays on full.

Gauge will not read, what is in tank. How do I check to see what the cause is. Fuses are good. Thxs, Brewluv

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In your tank thers a float it could be sticking failing that the clock is faulty

Posted on Dec 06, 2008

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1 Answer

Gas gauge staying at empty when tank is full


Spencer, Check all fuses ,plugs and grounding at the tank.The sending unit module, inside the GM's gas tanks were notorious for going bad in this err, when you changed it did you use a quality part? Also the fuel pump sending unit plug/wire harnesses were known issues, so much that replacement pumps would often come with replacement plug to splice into existing harness. Check the attached links,instruction and guides on how to trouble shoot fuel gauge/sending unit, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
General Motors Fuel Gauge Troubleshooting American Autowire
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What is wrong - The fuel gauge on my YP125R X-Max is constantly showing full


A constantly full fuel gauge is usually caused by a short circuit on the sensor wire. Check the wiring by isolating the wire as near as possible to the fuel gauge. Measure with an Ohm meter between the wire and earth, the reading should be more than 10 and less than about 200k. A short is indicated by a reading of around 0 Ohms, depending on the accuracy of your meter.
A second possibility is the sender unit in the fuel tank which could be faulty, and then finally, and only finally, the head gauge could be faulty.

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1 Answer

Is there an ascending unit in a 2000 suzuki Grand Vitara


you used to service stations to prove its full.
using auto shutoff? if not do that first.
no need to condemn any gauge for that. or use a dip stick into
tank filler and see if it is really full.
sure there is a sender unit in all cars. all.
the sender test is covered in the FSM. clearly
alldata.com too.
and at suzuki pit stop plus (google those. 1s hit every time)

only 2 tests. tell you which is bad. the gauge or the sender
first check the fuses, for ever and ever all electrical failures.
but usually the whole meter sections go dead with a fuse.



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2000 Dakota quad cab fuel gauge wont work, jumps to full when started, fuel pump has been replaced. What next?


Check for a frayed wire touching metal and grounding out. The gauge works on resistance and it registering full indicates a short to ground. Either that or your gauge itself is bad.

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Good day
You have to look in under the dash and make sure the connections at the back of the cluster is in place. If that is all good then check the fuse box and make sure all fuses are in place and working correctly.
Good luck.

Jan 21, 2014 | Cars & Trucks

1 Answer

Faulty gas gauge


Most of the time its is the sending unit in the fuel tank. The test for it is to use a variable resistor that is hooked up to the wiring at the fuel tank and watch the fuel gauge if the gauge works ok thats makes 100% sure its the sending unit. At 245 ohms the gauge should read full, 180 ohms for 3/4 full, 160 ohms for 1/2 tank, 100 ohms for 1/4 tank and 42 ohms for empty. The color of wires at the fuel tank is purple wire and black wire. You can also use fixed value resisters. If the fuel gauge the wires from the sending unit to computer then to gauge for bad connections, shorts, broken wire and bad grounds. If the wires test ok that only leaves insterrment cluster or computer which even most dealers can't test eather one but the insterment cluster would be a more common problem then the computer. But about 95% of the time it will be the fuel level sensor in the gas tank that causes the problem. Good luck.

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1 Answer

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The sending unit inside the fuel tank is at fault doing this to your gauge

It has a reostat that measures the amount of fuel in the tank. The float has a arm that rides along the reostat giving out the measurement. The arm is you can say waving up and down from a bad float that has no ablility to stay steadily bouyant no longer

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1 Answer

Gas gauge reads full when underway. However, when


Most likely it a bad fuel level sensor on you fuel pump. You will have to replace the fuel pump as that is the only way to replace the sensor for you fuel gauge. The sensor is built into the fuel pump. The contacts on the sensor become corroded over time and cause the sensor to malfunction causing your fuel gauge to read full all the time. I have a 2001 Montana extended version that had the same problem. In order to know when I needed to fill the tank, I would completely fill it each time I put fuel in and reset my trip odometer. I would go 400 miles on the tank before I would refuel until we were able to replace the fuel pump.

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1 Answer

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While it could be a bad gauge, as it's an electric gauge, most likely it's the sending unit inside the gas tank. Make sure your fuses are good, and your ground wires are clean and tight, especially under the car. If all that checks out, you might want to drop the gas tank and pull out the sending unit.

Jul 31, 2009 | 2000 Pontiac Grand Prix

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