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Re: fuel guage problem
The gauge has a ceramic calibration resistor on the back of the gauge coil cannister. If it's cracked or not making good contact it'll cause the gauge to malfunction the way you describe.
If the gauge itself has stared to fail that'll cause this too.
The other thing that'll do this is increased resistance in the sender circuit... but that'll cause the needle to read super high, past the Full line on the face, when you fill it.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
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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