1973-1991 Dual fuel tank systems theory of operation

[aggie91]

Originally Posted by aotte1

Thanks for sharing your knowledge on this subject. 1986 K10 short bed, needs right side tank replaced, suggestion on good replacement tank, and/or key factors to look for.

Thanks,
Les

Originally Posted by rodstored-72

aotte1, this is the tank I purchased for my '86 2wd swb for a LS conversion. this is a 16 gal tank for shortbed purpose. you will need to get a 20 gal tank for a longbed...
link:https://www.amazon.com/Spectra-Premi...+Chevrolet+C10

hope this helps.. good luck

If you are using fuel injection with an in tank pump, the GM11C for short bed or the GM1C for a long bed is a preferred tank as it has a baffle around the pump to help keep fuel at the pump when the level is low.

Long bed version:
https://www.amazon.com/Spectra-Premi...+Chevrolet+R10


Otherwise for a regular carb set up, the GM1B tank is the one for the long bed.
https://www.amazon.com/Spectra-Premi...+Chevrolet+C10