Fuel gauge not working correctly?

TISHEA

MEMBER
1999 CHEVROLET TRUCK

Hello! Recently, the fuel gage needle on the dash of our Suburban has started to shake wildly. I have not been able to easily find any information on the subject. Could this be a bad fuse? A short in the electrical system? Does anyone have any ideas on where we should begin to isolate the problem?

Many thanks,
Tishea

3 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Just to add a little information to this post the 1988-1999 old body style truck has a fuel pump ground issue that will make the fuel gauge vibration issue you all have mentioned. Here is a tutorial showing how to test wiring:

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

I would suggest you inspect the fuel pump ground wire to check for damage, corrosion, or anything else to ensure a good ground connection. I've attached a wiring diagram below of the fuel pump circuit and circled the ground wire in red. Hope this helps and thanks for using 2CarPros.

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Wednesday, April 21st, 2021 AT 12:36 PM

CAP603

MEMBER
1 POST

Thanks very much. I haven't heard of this resolution previously.

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Wednesday, April 21st, 2021 AT 12:36 PM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

Yes, it's unfortunately a common problem for this body style truck. I've owned two and it happened on my 1997 K1500. Let us know if you have any further questions on this issue or need any further instruction. Hope this helps and thanks again for using 2CarPros.

Danny-

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Wednesday, April 21st, 2021 AT 12:36 PM