Question about 2005 Chevrolet TrailBlazer

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Fuel gage doesn't work

Gas gage works for a little why'll then nothing

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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.

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"

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

Posted on May 22, 2009

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There is only one thing that causes this problem and it is the gas gauge sending unit in the gas tank, u need to replace it.

Posted on May 20, 2009

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It's possible that it could be a faulty gauge, this is a pretty common issue for Trailblazers to have. Here's a link with more information about these GM gauge problems. Also, where you can purchase replacement parts on Amazon if you want to do the repair yourself.
Trailblazer Speedometer

Posted on Dec 01, 2014

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SOURCE: 2003 S10 gas gage not working

bad ground on tank

Posted on May 10, 2009

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Re fuel gage.


the fuel tank sending unit is defective in your van, this has nothing to do with the fuel pump going out, this was a 100% incorrect statement by the shop that said this, but do understand that if you pull the fuel tank to repair the defective sender for the gas guage u might as well replace the fuel pump which also is in the fuel tank, they (the pump) are are getting worn out at about the miles you have on this car.

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