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Old 03-13-2010, 01:29 PM   #1
tucsonjwt
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Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,195
Gas gauge reads 1/4 tank on full tank of gas

My 83 C20 dual tank 454 has me stumped. The gas gauge reads only slightly above 1/4 full on both tanks when they are full. Once the tanks actually get below 1/4 tank full, then the gauge seems to read accurately.
I just installed new fuel tank sending units in both tanks (Spectra brand) and made sure that the grounds to the frame were good.
The tank switch works properly.
What should I check next?
(P.S. I am neither a mechanic nor an electrician, so I need gas gauge troubleshoot instructions for dummies.)
Thanks
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