Question about 1999 Chevrolet Tahoe

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My fuel gage isn't working properly

My gas needle jumps from F to E or from E to F on its own, it's not reading, & I just put a brand new fuel pump assembly on it.

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  • Anonymous Mar 02, 2009

    my rpm gauge, fuel gauge, and my windows wont work on my 1988 bmw 528e.

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  • 26 Answers

Sending unit in tank is bad need to drop tank to install new.

Posted on Jan 01, 2009

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Just replaced fuel pump/sending unit in a 2004 Bravada for a no start condition....now the gas gage doesn't work? Dropped the tank again and put OLD sending unit in....key turned on tank reads full (full...


Your replacement fuel pump assembly float got stuck somehow rendering it useless. also make sure the electrical harness was connected properly on the replacement. I take it for granted that the replacement was new? Perform a bend test on your replacement fuel pump assembly with an ohm meter. Move the float and see if the ohm meter resistance changes.

Jun 27, 2014 | Cars & Trucks

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Gas gage 99 gmc envoy


If your gauge is pinned in one direction or the other and doesn't move, you could have a short. If it's in different postions or just incorrect, it's is your pump. If you do not have a new fuel pump that is AC Delco, Delphi, or Denso brand, it probably IS your pump. #1 problem with guage accuracy is this fuel pump/sending unit. Aftermarkets do not last long at ALL. It is very common for most other brands to last less than a year.

Mar 24, 2014 | 1999 GMC Envoy

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Is the fuel sensor on a 1998 voyager located in the fuel pump or a separate part in the fuel tank?


the "sensor" is actually just a long arm with a "floaty? on the end and gauges where in the tank the top of the fuel is located therefore giving you a read out on your dash. the sensor your talking about sounds like the low level readout sensor.this is located elsewhere and is simply asensor that reads the information of of the fuel pump and vocalizes low fuel warning. if you knowingly have fuel in your vehicle then your sensor may be shorting or or your dash gause has a short.

Jan 12, 2012 | 1998 Plymouth Voyager

1 Answer

I think te gas gage im my 2004 GMC Envoy is reading too low. How can I tell and and what could the problem be?


if you put any gas in the fuel tank the fuel gauge needle should move toward full mark.if not you have a faulty fuel level sending unit.its in the fuel tank attach to the fuel pump assembly.

Jan 04, 2010 | 2006 GMC Envoy

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Fuel gage isn;t working on malibu 97


you just have to make sure they didn't tie into the fuel sending unit wire to power up the neon lights. it should be a orange wire.

Dec 27, 2009 | 1997 Chevrolet Malibu

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2001 chevy silverado 4.8 gas gauge not working properly


Fairly common problem with GM vehicles. The sending unit in your tank has a small circuit board that an arm is attached to which moves up and down according to your fuel level. This circuit board and arm are not making good contact. Unfortunately the only good solution is to replace this part.

Oct 28, 2009 | 1999 Chevrolet Silverado 1500

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

Feb 28, 2009 | 1996 GMC Sonoma

1 Answer

Gas gage constantly says full when it's not!


Unfortunately this is most likely the fuel pump module, which includes the fuel level sensor also. This should be diagnosed more thoroughly with a scanner, a good scanner will be able to check instrument cluster separately to confirm the gage is working right,and check for trouble codes that may not light any warning lamps. Hope this helps. Rate me please.P.S. Dont use that fuel station any more.

Jan 21, 2009 | 2002 Chevrolet Malibu

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2003 Cadillact CTS


sometimes beleive it or not its the gas cap is not sealing right

Jul 07, 2008 | 2003 Cadillac CTS

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