Question about 2005 GMC Envoy Xl

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2006 GMC Envoy XL gas gauge reads empty after filling, then slowly moves up after driving but will continue to lose pressure until it reads empty and the light is on, then the check engine light came on. my problem is the same as all the rest. never had a problem until a fill-up at 96000 miles. now every fill-up the same. fuel gauge goes empty then after awhile it works ok. acaltenbernt@att.net

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  • bberry1962 Apr 06, 2009

    Same problem. Gas gage is not working. It works for a minute sometimes if I'm going down a hill or climbing a hill. In a little while the empty light comes on and then the engine light comes on. My Envoy will not let me put more than 7 or 8 dollars worth of gas in it. It will start spilling out of the tank as though it is full. Help!!!!!!!!!!

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Sending unit. Its all one unit including fuel pump, float, ect. The check engine light is because of the high or low resistance in the unit. Let me know if you have already fixed.. You have to drop the tank to get to it also.

Posted on Aug 04, 2009

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Have the fuel sensor check - my o2 sensor went in my 2005 envoy and caused all the same problems you are listing

Posted on Sep 01, 2009

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1 Answer

2006 GMC Envoy XL gas gauge reads empty


Gas gauge readings are controlled by the sending unit on the fuel pump. I do not believe there is a separate fuse for any particular gauge. In order to fix it, you have to remove the fuel pump from the gas tank, determine if the float is stuck or the sending contacts are out of alignment or dirty. Some can be repaired, but most are not serviceable. Remedy: replace the fuel pump and sending unit assembly. I would first inspect the wiring from the fuel pump connector(s) to make sure you have good connection and wire integrity.

Jul 21, 2014 | 2006 GMC Envoy

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Gas tank reads empty after filling and driving for a second. Gauge slowly starts to climb back after driving for 5 plus minutes then drops again.


the flue sense in your tank is bad most likely but it could also be just a bad connection between it and your flue gauge witch can be caused by corrosion or a lose wire

Jan 20, 2011 | 2006 GMC Envoy

1 Answer

2006 GMC Envoy XL gas gauge reads empty after filling continues reads empty and the light is on then the check engine light came on what can be the problem how ca i fixe it to save mesome $$$


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.


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Feb 18, 2010 | 2006 GMC Envoy

1 Answer

2006 envoy gas cap won't tighten and the fuel gauge reads empty on fill up and fluctuates back and forth.


You can just replace the gas cap...However about the fuel guage fluctuates back and forth...thats due to the sending unit, which is located on the fuel pump itself

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Common problem on the 03-06 Envoy instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Envoy fuel gauge problems

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The sending unit in your tank is bad replace it.

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most likely a fuel sending unit problem in the tank. could also be problem in dash but sending unit is first suspect

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8 Answers

2006 GMC Envoy XL gas gauge reads empty after filling, then slowly moves up after driving but will continue to lose pressure until it reads empty and the light is on, then the check engine light came on.


The sulfur content in the fuel is contaminating the contacts of the sending unit.

Some people have had good luck with some fuel system cleaners solving this problem. The cheap stuff doesn't seem to do the job.

Not that GM isn't completely exonerated from fault but the gas stations don't do a very good job of watching what the stations sell.

Sep 03, 2008 | 2006 GMC Envoy

1 Answer

2006 envoy gas gage


your gas gauge sensor is most likley the problem on alot of new cars they measure your fuel off an average of were your float is at. like if your not moving it stays in one spot but as you move the float moves and reads the lowest amout that it is averaging and if your float keeps reading low your going to read that you have alot less gas than you really do. have you tried filling the tank all the way and see what it does? if it stays at full until you use some gas and your float starts moving your gas gauge will probley go down in that case its the fuel sensor if this dont help let me know and ill c what i can find out for you

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