Quote:
Originally Posted by kwmech
You know about pushing the switch all the way to where it springs back to energize the solenoid? Short of that, when the solenoid moves it throws a switch inside the solenoid (switching valve) to swap the fuel gauge.
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Not after 1986... The TBI trucks depend on the power to the valve to run the fuel pumps so GM did away with the obnxious momentary switch they used from 1981-1986..
If you want details on how this system works go to the
73-91 Dual Fuel Tank Theory Of Operation thread and read post #2 for the 81-91 motorized valve system. Ignore Post #1 that's the outline of how the 73-80 solenoid valve system works.
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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...
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