1973-1991 Dual fuel tank systems theory of operation - The 1947 - Present Chevrolet & GMC Truck Message Board Network



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1973-1991 Dual fuel tank systems theory of operation

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06-06-2021, 11:23 AM

#11

83GMCK2500

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Join Date: Sep 2009

Location: Beaverton, OR from WA State

Posts: 1,515

Re: 1973-1991 Dual fuel tank systems theory of operation

Quote:

Originally Posted by rodstored-72

hatzie, I tried to skim through and find out, but can you tell "us" again which tank (side) is the main tank? and which is the aux. tank? I am trying to do this on my '86 LS swap now... still!

thanks!!!

When ordering/building the truck the single tank option defaulted to passenger side from 73-80, and driver's side from 81+. Hatzie has the perfect response to how the switch/valve treat the main/aux distinction. I just wanted to mention the above oddity in the two generations.

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Devin

1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt
1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050
1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350

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