Question about 2006 Chevrolet Trailblazer

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Fuel gauge For about a week my fuel guage would go up and down and then finally it just stayed on empty. I have to re-set my mileage and fill-up every time so I know how much gas I have. Every once in a while it will read that there is 1/2 or 1/4 tank, but then goes back to empty, even when it is full. Is this the gauge or is this the flow meter in the tank? Can't go to the dealer, I'm not even living paycheck to paycheck right

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  • Anonymous Mar 14, 2009

    My problem is the same. I do the same thing fill up and reset trip odometer when it reaches 350 miles i no it's about time to fill up again

  • whitey 530 May 09, 2009

    I have same problem with my fuel gauge It is a shame they do not last longer.

  • magmon1 May 16, 2009

    I have the same problem. I have been relying on my trip meter for about 4 months now. It's inconvenient, but too expensive to change, until another problem with the vehicle exists.

    I wish there was would be an inexpensive fix.

  • antoniosolis May 20, 2009

    will the bad fuel sending unit cause the vehicle to have trouble starting too. Will this problem cause the check engine light to turn on. If so then all I have to do is change the fuel sending unit right.

  • Anonymous May 21, 2009

    Same problem...Twice now within two years... Dealer says it will cost me $400.00 to fix with new fuel sensor... Somehow I dont beleive them since the last time it happened it was a recall item.... Thinking of buying Volvo

  • Cynthia Nichols May 25, 2009

    The answer to "will it cause the check engine light to come on"? The answer is "YES"- my check engine light was on, took it in and was told it was because the fuel guage was reading that there was no gas in the tank and that there were no other problems with the truck.

    Someone said this was a re-call though?? For the 2006?

  • Cynthia Nichols Feb 08, 2010

    I checked with Chevy customer service and there is NOT a re-call on this problem, as a matter of fact- after the fuel gauge went out, the CD player stopped working, and the HVAC went out- none of this was taken care of I drove the car for almost a year without hvac

  • loomie martinez Mar 13, 2013

    I had the Fuel Pump assembly changed and the Flex fuel module under the dash about knee level. I was told it may be a ground problem. I removed all Ground cables and cleaned them. I also cleaned off battery terminals. Is it possible there is a bad ground on wire harness to fuel pump?



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Khooper, in another forum, told me that "Chevron Techron Fuel System Treatment Plus can remove harmful sulfur deposits from the sending unit and a filmer agent that can prevent the deposition of said sulfur"

My 05 Trailblazer LT 2WD.
Erratic readings, and when the fuel level was below 1/2 full, the needle would sit on "Empty" with the amber light staying on.

So I went to a dealer, they replaced the fuel level sensor (p/n 19177712 SEN KIT 3.107 $118.62) with labor $270.00 for a total of $398.86 this appears to have fixed it for now.

I also talked to another mechanic who blames ethanol for these deposits !

Posted on May 22, 2009

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Sound like your fuel sending unit has gone bad. There is a sensor attached to the float on the sending unit that reads the floats position relative to the fuel in the tank,these sensors wear out over time and the float will stop reading the proper level. Unfortunately, most fuel senders that are in the fuel tank also come equipped with a new fuel pump on them, therefore making them a higher price. But you are definately going to have to have that replaced unless you feel safe relying on your trip meter. Hope this helps.

Posted on Mar 09, 2009

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What is that

Posted on Feb 10, 2010

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Same problem called gm direct trying to get them to do a recall on them have 2006 trailblazer ls,do milage reset to know how far i can drive .tecron will not help either tabs break off or springs go bad found just the sending unit $80,

Posted on Jan 08, 2010

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