Fuel gauge not working?

2005 BUICK TERRAZA
167,195 MILES
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BRYANTHERRIEN2015
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  • 3 POSTS
I am wondering if there is any way to reset the fuel gauge and the electronic display for the fuel?
May 26, 2019 at 3:05 PM
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KASEKENNY
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Unfortunately, there is not a way to do this as the most likely cause of this the fuel level sensor in the tank as failed. So it is telling the PCM the wrong information and the PCM then tells the cluster that wrong info as well. So the cluster is just displaying the info it is given.

So we need to prove this out by checking the voltage on the wire highlighted below from the pump to the PCM.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-wiring

However I suspect we need to replace the pump so here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

Below you will find the process on how to replace the pump from the manual.

Let's run through this material and let us know what questions you have. Thanks
Feb 5, 2021 at 5:03 PM