My gas gauge its not working right. it is reading empty but I just filled it up, all other gauges are working. What could be the problem?
Oct 17, 2010 at 9:36 AM
instrument panel?
2005 CHEVROLET TRAILBLAZER
BROBINS
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Hello, I'm Danny.
There are 2 possibilities for that. One being the actual gauge in the instrument cluster or two the sending unit in the fuel tank. You will need to check the resistance of the fuel sending unit in the fuel tank. If it doesn't show any or zero the sending unit is faulty. If the sending unit checks out okay then the problem lies with the actual gauge in the instrument cluster. Here is a tutorial showing how to test wiring:
https://www.2carpros.com/articles/how-to-check-wiring
I've attached a wiring diagram of the instrument cluster below for your vehicle. I've cut the picture into 3 pieces so you could view larger. I wouldn't think it would be a wiring issue but actual gauge malfunctioning itself. Hope this helps and thanks for using 2CarPros.
There are 2 possibilities for that. One being the actual gauge in the instrument cluster or two the sending unit in the fuel tank. You will need to check the resistance of the fuel sending unit in the fuel tank. If it doesn't show any or zero the sending unit is faulty. If the sending unit checks out okay then the problem lies with the actual gauge in the instrument cluster. Here is a tutorial showing how to test wiring:
https://www.2carpros.com/articles/how-to-check-wiring
I've attached a wiring diagram of the instrument cluster below for your vehicle. I've cut the picture into 3 pieces so you could view larger. I wouldn't think it would be a wiring issue but actual gauge malfunctioning itself. Hope this helps and thanks for using 2CarPros.
Images (Click to enlarge)
Dec 8, 2020 at 7:38 PM
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