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Old 02-24-2021, 03:44 AM   #1
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Default Replacement Fuel Tank Question

I have to replace the fuel pump. Great...I know the tank is only 15.9 gallons, but does anyone know if they make an aftermarket one that has increased capacity, like 18-20 gallons?


I have to drop the tank and if I could replace it with a larger one it would make my trips a bit easier.


Model: 1993 Nissan D21 4 cyl. 5 speed manual transmission, RWD.
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Old 02-24-2021, 03:55 AM   #2
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KC trucks came with 21 gallon trucks.
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Old 02-24-2021, 04:14 AM   #3
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Quote:
Originally Posted by Deerhurst View Post
KC trucks came with 21 gallon trucks.

Sorry, I'm not familiar with a KC truck. What is it? Also, does the 21 gallon tank fit the D21?


Also, as old as the truck is, I expect there to have gunk in the original tank.


Thank you.

Last edited by detail; 02-24-2021 at 04:35 AM.
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Old 02-24-2021, 04:49 AM   #4
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KC = KingCab (aka: extended cab)


My 89' SE KC only has a 15. Just filled it yesterday. The light came on and I pumped 14+.
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Old 02-24-2021, 05:04 AM   #5
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The early trucks only had the small tank with the 4cyl. My single cab short box V6 also has the small tank. I believe by the 90s the v6 also got the larger tank for all models.
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Old 02-24-2021, 05:16 AM   #6
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Ah I see. Yes, I have the regular cab, 2WD. Are the tanks interchangeable?
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Old 02-24-2021, 02:12 PM   #7
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I looked into doing this swap. Unfortunately the larger tanks are kinda hard to find and are a bit expensive. My truck has the little baby tank. It's annoying having more range on my motorcycle than my truck but you get used to it. From what I recall looking into this the larger tank isn't a direct bolt in, it was going to require some modification to get it to fit into my truck. It's possible that's because the tank was from a 90s truck and my D21 is an 86.5. Also the strike plate or whatever deal that goes under the bottom of the tank will have to be replaced (or you can fabricate one) with one that will fit the larger tank as well.


I decided it wasn't worth it, as I plan to eventually engine swap mine and will put a fuel cell in at that time.
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Old 02-24-2021, 07:43 PM   #8
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Quote:
Originally Posted by 89'HBV6 View Post
KC = KingCab (aka: extended cab)


My 89' SE KC only has a 15. Just filled it yesterday. The light came on and I pumped 14+.

you have a light?
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Old 02-24-2021, 11:10 PM   #9
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I haven't looked into this issue as I don't do long drives in the truck anymore. However, it is interesting. Another approach could be to put in a second tank and a transfer pump?
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Old 02-25-2021, 12:33 AM   #10
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Quote:
Originally Posted by Tropicalcats View Post
you have a light?
Yep, 89' SE 2wd. It's got an idiot light. I don't rely on it, just happened cause I had to run a bit of distance.
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