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.
Same exact problem with my GMC. I filed a complaint with GMC directly and sent them an email of this problem. Please everyone do the same.
I just called GMC they told me there is a bulletin #10054D which covers 10 years old or 120,000 miles . They said it will be no cost to me . I am waiting to hear from dealer and will post after...
Same problem here with 2006 Envoy. NHTSA has opened an investigation early this year. Be sure to file a complaint with them:
http://www.safercar.gov/
or 1-888-327-4236
Investigation # DP10001: THE PETITIONER ALLEGES THAT THE FUEL TANK LEVEL SENSOR IS DEFECTIVE AND COULD RESULT IN A SUBJECT VEHICLE RUNNING OUT OF FUEL, STALL, AND BEING REAR ENDED BY ANOTHER VEHICLE. ODI WILL EVALUATE THE PETITION FOR A GRANT OR DENY DECISION.
I have the same issues, I filed a complaint withhttp://www.safercar.gov/ aswell.
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I filled up my Envoy (it was at 1/4), when I started the vehicle the yellow low gas light came on and the bell. I shut off the vehicle and restarted it and it was fine - that was 3-4 fill ups ago. It has continued to get worse. It now fluctuates up and down, but if tank was recently filled, will remain on E for a while.
I have also contacted GMC about this problem.
I just bought my 2006 GMC Envoy Denali and the gas gauge just quit working. it has 100888 miles on it.. Wondering now what to do.??
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I had the same problem...It cost me $800 to fix it because gas line was clogged and the sensors stop working...get ti fixed ASAP...I waited and got stuck in Newbrugh cuz the truck would not start even with a full tank of gas.
Like the others, i had the same problem with my fuel gauge. I had a garage replace the fuel tank sending unit, that fixed the pproblem. Shortly afterward, GM sent me a recall for the fix, letter also stated that if I had the repair already done, they would refund me the money. I took a copy of all my bills related to this fix and the dealer gave me a check for the full amount. so try your gm dealer first on this matter. replacing the sending unit is not an easy or a very safe job. The sender is in the gas tank.
If you cannot wait for a recall, please see david 197_99's answer.
david187_99
"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."
the fuel pump, filter and fuel sensor are inside the tank, on the top. to change it, you have to disconnect the tank and lower it to the ground (you should empty the tank before dropping, as such).
SOURCE: gas gauge problems
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
SOURCE: 2006 GMC Envoy XL gas gauge reads empty
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.
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I Have a 2006 gmc envoy at first the gas gauge would move to full but slowly began to move back down now its just stuck on E with the engine light on!
mine does the same...never know how much gas is actually in the vehicle while driving...the meter goes up and down...recently i was driving...thinking i had gas...and had to coast to the nearest stop...not knowing i'd run out of gas
I have the same problem fuel guage says it's empty but there is gas. Hit and miss if the engine light comes one.
the gauge shows empty at all times
i had to change out my gas sending unit 2 times and it works now
After filling up, the low fuel light comes on and then the guage eventually goes to full very slowly. Seems to happen only when putting gas in the tank. Stopping, shuting off the engine and removing the gas cap doesn't cause the condition. Only putting gas in the tank.
my gas gauge goes to empty only after re filling. I have to use the odomiter between trips. Now my engine light is on and I dont know if it is from that same problem.
I have a 2005 envoy with the same problem. Started two fill ups ago. Was working fine then one month out of warranty .... Bingo.
I will read other posts and have to research the gas sending unit comment.
Same problem .i fill it up and gauge drops to empty, and then slowly over time it reads ,i hope the right level. I have supported GM all my life ...Its over, I will not buy another GM product again.Constant payments for items that should be recalled is driving us all away from GM.SICK AND TIRED OF IT.
2006 GM Envoy check engine light came on and gas gauge keeps reading empty to full then back to empty again.
My gas gauge went on e after a fill up and has not reset itself. I am taking it in for service tomorrow with a copy of all the problems with the gas gauge. If I have to pay for this I am contacting GM and will not buy another GM, This is my sixth GM and will stop if not fixed.
I have the same problemwith my 2005 GMC Envoy. It started about a month ago. Does anyone know the cost to get this fix?
2005 XLT Envoy Gas Gauge goes up and down... has anyone figured this out ?? i would think this should be a recall any help would be appreciated!!
Louie
I have the same problem which started a week ago! Does anyone know a solution to this?
I have a 2006 Envoy XL SLT and about 2 days ago the gas needle just suddenly began to drop until the low fuel light came on. I knew I had gas but it just kept moving back and forth. Basically, I can't tell how much gas is in the vehicle. So far the check engine light has not come on.
Same Problem. First the needle would fluctuate. Now it's just stock on "E" and the engine light is on most of the time.
Just started having the same problem with my 2006 GMC Envoy - so frustrating
I have the same problem with the fuel gauge moving from F to E to F and also service light turned on. car still running without stall.
Same problem on 2006 Envoy XL. Fuel gauge swings from F to E and back, check engine light in on. Car has only 49,000 miles. This should be a recall.
Report your problem herehttp://www-odi.nhtsa.dot.gov/ivoq/index.... It only takes a few minutes.
I have a 2005 Trailblazer having same issue gas gauge going back and forth when i fill up it goes to empty until i drive about 25 miles then it gors up to almost full and check engine light comes on and off.
i have the exact same problem,,,,whats up!!!!
After erradic readings the fuil indicater now remains on emty and the warning alarm goes off randomly.
I have the same problem. What is the cause? How much does it cost to fix?
I have the same problem, super annoying. Mine use to fluctuate while driving, now it is always on E. My husband is on his way to the dealership right now, they better fix it under our warranty.
i have the same problem my gage reads empty all the time 2005 envoy, sometimes the light goes off
Exact same problem. Gas light stays on all the time and check engine light as well. Ran out of gas yesterday because of it actually, well that was my fault but I need a solution please!
2006 GMC Envoy with exact same problem-
ran out of gas 4x basing mileage @ 18 mpg-
now use 16mpg & always have extra-
as far as gage, annoying, but, I have a feeling that tank will need to be dropped, so, forget it...
I have a 2007 and this just happened today anyone have a fix yet?
I feel your pain......same thing for me on my Envoy 05. I was told the fuel filter is the problem and that the tank would need to be dropped of course because the filter is in the tank....and it would be about $400 to fix.........why couldn't it be an easy inexpensive fix? I am biding my time and hope it doesn't completely go on E all the time.
2009 Envoy XL with same gas guage issues and engine light coming on sporatically. Any helpful hints???
2006 GMC Envoy gas gauge reads empty. Fluctuates up and down, but if tank was recently filled, will remain on E for a while. Of course, not covered under warranty anymore and now will not pass inspection. Ridiculous.
After filling the tank in my 06 Envoy the gauge reads empty for a while, then goes up and down, after a few days after getting the gas it will beging to work, I was told I needed a new fuel system...$600.
just put gas and now it is showing empty.
I have the same problem. I fill the car up and it registers empty. After several miles of driving it returns to full then back to empty for several additional mile. This is disturbing.
My GMC Envoy Denali started doing the same thing. I will fill it and it will still read empty. Then it will go to full then back down. I never know how much I actually have. The replacement part is over $700.00. The labor will be about the same because they need to remove the gas tank.
I just bought my GMC Envoy Denali and the gas gauge just quit working.,
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