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I have an ‘02 GMC Sonoma 4.3 crew cab 4×4.

I have an ‘02 GMC Sonoma 4.3 crew cab 4×4. While stopped, idling and in park, the fuel gauge needle will start to fluctuate. Then it will suddenly drop to empty. It may come back up slowly while driving or all at once. I had false readings before but this didn’t start until I used Techron fuel system cleaner. Any ideas?

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In my area of the Northeast, many customers are having this issue due to the composition of the fuel leaving a residue on the contacts. Where this is the only issue, the senders seem to respond well to a high-quality fuel system treatment.

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Thomas Dayton
Assistant Manager
J S Auto Supply in Jamestown, N.Y.

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