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GMC 2004 Yukon gas gauge reading overfilled-incorrect, how to fix?

How to repair faulting gas gauge?

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Change out the fuel sensding unit

Posted on Dec 02, 2012


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Posted on Jan 02, 2017

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SOURCE: Heated seats won't stay on in 2004 GMC Yukon Denali

See GM TSB 05-08-143-001, If you have Adjustable pedals, especially if they don't work with the memeory buttons, but function with thier own buttons. Its the Brake Pedal Position Sensor is shorted and mesing up the seat module which controls the heaters too. My 05 Suburban had the same issue

Posted on Dec 11, 2009

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SOURCE: gas gauge stopped working on my 2004 gmc truck

Check for factory recall, some models are affected. I believe yours is.

Posted on Jul 19, 2009

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SOURCE: 2004 Yukon XL Denali fuel gauge fluctuations

Your sending unit for the guage is part of your fuel pump in the tank. But first try your fuel pump relay, may be working intermittenly when you hit a bump or something. Or possibly a loose wire somewhere along the way. Much less expensive (worth a look).

Posted on Dec 18, 2009

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SOURCE: Engine temperature gauge reading on

I have the same thing happen to me. have 2004 GMC Serria 5.3, Engine is not hot. gauge now pointing down - straight down. replaced engine sensor but did not fix problem. I now believe it is the gauge. still troubleshooting. Initial problem indicated a rise in tempature, so I stopped and looked at engine, not hot- plenty of water, hose can hold, drove around some more, then gauge started to climb, stopped again had mechanic check, he had heat sensor and checked engine temp, pretty normal. suspected sensor so replaced. when engine is cold still gauge points straight down.

Posted on Jan 08, 2010

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SOURCE: 2006 GMC Envoy XL gas gauge reads empty after

It is most likely your fuel level sending unit has gone bad. It sits inside your fuel tank to tell the fuel guage how much gas you have in the tank.

The sending unit for the gas gauge is in the fuel tank and part of the fuel pump module, it is not sold seperately. Price is around $350.00, 2 hours labor to install the part.


Posted on Feb 18, 2010

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How do I repair or replace a defective gas gauge?

It is in the instrument cluster, which has to be removed to replace the gauge. It cannot be repaired. Did you first check the 10 amp METER fuse in the fuse panel?

Now let me say, that when the gauge quits, it is more often a fault in the sending unit in the gas tank, and not the gauge. Here is how to find out if your gauge is good: Find the fuel tank electrical connector, and pull it apart. You will need a small jumper wire. Find the blue wire in the body side of the connector (not the fuel tank side). Put the jumper wire into the blue wire terminal, turn the ignition key to on not start, and ground the jumper wire to a metal frame piece. Someone needs to watch the fuel gauge needle while the wire is grounded. If the gauge in the dash is good, the needle will move. It will probably go to either full or empty, but if the needle moves, the gauge is good and the fault is in the sending unit in the tank. Don't give up testing until you are sure the jumper wire is being grounded good to the frame. Just touch the wire to frame and watch the needle movement, once sure, stop so you don't blow the fuse. If the needle doesn't move, first check the 10 amp meter fuse. If fuse is good, it must be the gauge.

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1 Answer

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The common fault is that the fuel level sending unit is defective inside the gas tank.

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I have 1999 0ldsmobile van and the gas gage is stuck at 1/4 tank , also the odometer and trip don't work

The odometer/trip display in this model is a LCD display and it is burned out, it is a common fault on all GM models in this model year range. The problem can be repaired but it requires the Instrument cluster be removed form the Van and be sent out to a GM approved repair center. These repair shops are on the Internet just google GM instrument cluster repair. The cost is about $160.00 US.
The gas gauge is a separate problem, it is caused by a defective gas level sending unit inside the gas tank. TO replace the level sensor for the gauge you must remove the gas tank from the van. To do this repair you need a good hydraulic floor jack, jack stands to support the car and a good set of common hand tools and a helper if you do the job on the ground. Use great caution when working on a gas tank as the risk if fire and explosion is quite high if proper care is not taken to a avoid creating sparks. Always dicinnect the battery negative cable before starting work on any part of the car. The parts cost for this is about $200 and 4-5 hours of hard labor.

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1 Answer

2002 mercedez 240c gas gauge problem

There are a few things that would cause the gas gauge to act up, the gauge itself may be a problemm or the wiring from the dash to the gauge and last the sending unit.

The sending unit which is located inside the gas tank itself is the most common reason for fuel gauge fault in many cars, the next would be the cluster (gauge). since its hard to replace just the gauge and also harder to buy a gauge the cluster is replaced. 99% of the time it is replaced with a used one..

Here is a link to a you tube video that may be helpful to you. this will help you understand how it works and what involed.
good day.

Feb 26, 2012 | Cars & Trucks

1 Answer

I see online that you are a pro with ford rangers. i have a 1993 ford ranger that has started leaking gas. the gas only leaks when the truck is running, when i turn it off it stops. it is a slow drip...

No iam not a ford ranger specialist iam a general mechanic often refered to as ,well dont go their but from description you have a leak on either the supply or the return fuel pipe so its on with the overhauls and get under and look for the leak ,now some pipes where they connect to a flexible pipe have a special connection but this is not insurmountable ,fit a metal insert into the plastic pipe and then fit a new rubber piece with 2 clips as most fuel systems use about 35psi ,Now as for the fuel gauge this is a bit more complicated as it could ba fault either with the gauge or the sensor in the tank ,now what you do is to locate the unit in the tank which normally you access under the back seat then as its a combined pump fuel gauge unit ,The big heavier cables will be the pump and the other two thin wires are the gauge sensor well join the two thin one together and if the gauge goes to max you need a new sensor in the tank if it doesnt go over then its a fault in the gauge end ,

May 06, 2011 | Ford Ranger Cars & Trucks

1 Answer

The gas gage on my 2002 deville does not register correctly. I never know how much gas I have. What are the problem areas to consider?

The problem is either a faulty fuel sending unit located inside of the fuel tank, the wiring between the fuel sending unit and the fuel gauge, or the fuel gauge itself is malfunctioning.

A good repair shop can find out for you which one is at fault by dis-connecting the wiring connector to the fuel sending unit and then use an adjustable ohms box to simulate the fuel sending unit, and the fuel gauge should read at a certain level of fuel according to the amount of ohms being put through the wire.

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Where is fuse for gas gauge

there is no such fuse. if its not working the fault is the gauge, wiring, or a failed sender in the fuel tank

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When I fill up my 2007 Pathfinder the gas gauge show zero gas, light on and the check engine light comes on. As I run the gas gauge will show the correct amount of gas and later the engine light will go...

The fuel level sensor is at fault and is setting the service engine soon light on. Your local Nissan dealer can repair this under warranty depending on your mileage. The fuel tank will need to be removed to access the sending unit.

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4 Answers

What should I check when the ''service engine'' light goes on in my 2000 chevy blazer? I have also had trouble with the gas gauge. It moves back and forth between half a tank of gas and then it shows...

Advanced Auto Parts and Autozone will check your OBDII for free (On Board Diagnostic System). They will give you a print out of what the code(s) are and possible solutions.
As for the gas gauge, you might check the sending unit from fuel tank and possibly the float in the tank. This requires dropping the tank, you may not be set up to do this work, so find a qualified shop in your area.

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1 Answer

Gas gauge not reading

This caqn be causede by bad wiring, bad sending unit, or fault on the instrument cluster (faulty gauge or bad voltage regulator.

Follow the instructions on website below:

Repair Your Fuel Gauge

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