Question about 2000 Oldsmobile Silhouette

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Gas gage not working

My gas Gage is not reading the proper amount of gas in my van. How hard is it to fix this problem

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In order to fix your gas gauge, you will need to remove the gas tank and either re-adjust or replace the fuel pump. In your van, the fuel pump and fuel sensor are the same unit.

This is moderately difficult. The hardest part is getting the fuel pump out of the tank without damaging any fuel lines or wiring. The procedure can take anywhere from 3 hours to 8 hours, depending on the tools you have available to do the job.

A hammer, long thick flat tipped screw driver and a socket wrench and set are a minimum for this job, though specialty tools made for your van can make the job easier and faster.

Posted on Jul 16, 2010

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Sounds lik the fuel sending unit. This can be a very labor intensive job if you dont have the proper equipment. The fuel sending unit is in the gas tank. You can sometimes gain access to the unit through the back seat somewhere. But most times the gas tank has to come down to have access and replace. If the fuel sending unit is fine. could be a pinched wire between the instrument cluster and fuel unit.

Posted on Jul 16, 2010

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2001 Olds Silhouette: plenty of gas in the tank but the gage will read full, 3/4 full, 1/2 full, and everywhere in between. Van runs fine. No other issues except the gage goes crazy and can't depend on...


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Aug 12, 2010 | 2000 Oldsmobile Silhouette

2 Answers

I have a 94 chevy s10 and my gas reads empty while i drive.but when i shut off the truck the gauge moves to different readings.


Is......the problem--"the gas gage reads empty when there is fuel in the tank. OR, The gage moves when the key to turned off ?

If it's the first,
You will need to test the gage and through process of elimination, determin if the Sending unit inside the fuel tank has gone Bad.

If its the second ? - Electrical gauges will move when powered down. Normal

Testing the gauge may not be easy - just depends on your ability.
It is a simple 2-wire gauge circuit, when disconnect (usually need the fuel tank) the gage reads in one direction (either full or empty)
then when shorted-the gage reads in oppisite direction.

Of course you must select the correct wires or you may short out the wrong circuits!! Most GM vehicles use a purple wire & black wire.

A quick method I have used to check the in-take part of the gauge is this.
1st. know there is gas - 1/2 tank works best.
2nd driver's door open, key in run position, engine not running.
3rd gently lift up on the door then let if come back down, gently.
just enough to cause the gas to slosh around.
4th - keep an eye on the gas gage, a bad sending unit in the take will show up as a "twitchy" needle.

Of course, if the gage never leaves empty - sloshing won't work.
I have a known good sending unit I can plug into the vehicle and simulate different levels of fuel - if the gas gage works, I know the problem is in the tank.

Let us know.

Dave

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a fuel sending unit seems to be the most popular solution. the part is about $40. I think the labor is what's going to kill you.

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