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Re: 1973-1991 Dual fuel tank systems theory of operation
Then it's down to the hose routing at the valve or the fuel pump itself.
If you take the bed off or at least slide it back a foot or two it's easier to work on this area than working in the dark over your head under the truck.
Don't use an impact on the bed bolts. You'll waller out the holes in the bed. If they are stuck just cut em off under the bed and replace them. Nut splitters work on the bed bolts too.
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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; 01-03-2019 at 06:44 PM.
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