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Old 09-06-2024, 05:50 PM   #1
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: New square body Owner Questions

Empty with more than 7 gallons of fuel in the tank usually means you have a shorted sender wire or bad sender.
If you have less than 4-5 gallons in the tank I would not expect the needle to move off empty.

Dead short to ground on the signal wire will drive the needle to E.

90Ω resistance to ground on the sender wire will drive the needle to F.

If you unplug the sender or break the tank ground wire the needle will go to the 3:00 position.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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