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Re: 6.2 fuel sending unit problems
You really only need vent, supply, and return for the diesels. The tank drain is superfluous.
GM stopped installing the tank drain in the Civvy rigs around 1984 or 1985 or so. Since the military spec for the trucks was based on an early 1984 chassis, and the military gets nervous about changes, they kept building them exactly the same til Uncle Sam stopped ordering them.
If it's stock pre mid-84 you'll find a valve somewhere around the spring hanger on the frame. It may actually be inside the spring hanger. The TM will probably tell you. You can get rid of this drain line unless you're going for exactly original.
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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.
Last edited by hatzie; 04-15-2018 at 02:33 PM.
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