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01-12-2018, 09:06 AM
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#1 |
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Registered User
Join Date: Dec 2017
Location: Missouri
Posts: 264
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gas tank replacement
I just bought a 1985 K30 with factory dual tanks and they both need replaced, I'm guessing they're the 16 gallon ones. Will 20 gallon tanks fit without mods, if so can I use the same sending units? Thanks!
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01-12-2018, 09:14 AM
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#2 |
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Registered User
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
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Re: gas tank replacement
k30 is long bed only factory so 20 gal is factory . tanks are same left/right so no need to get specific left/right . sending units tho are left AND right . senders are also same for tank size . just the side of truck as i said .
spectra premium is o.e.m brand and basically best aftermarket quality . rockauto / autozone / other parts places all have them .
__________________
77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great. |
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01-13-2018, 09:28 AM
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#3 |
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Registered User
Join Date: Dec 2017
Location: Missouri
Posts: 264
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Re: gas tank replacement
Well, I had that wrong.THANKS for the information.
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01-13-2018, 10:50 AM
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#4 |
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Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: gas tank replacement
When you buy new tanks,measure the filler hole.
There are at least 2 different sizes. Make sure the new tanks are the same size as your old tanks. Mike. 
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01-13-2018, 10:20 PM
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#5 |
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Registered User
Join Date: Dec 2017
Location: Missouri
Posts: 264
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Re: gas tank replacement
looks like spectra GM1b with 1 5/8 filler neck is the only option, I'll measure tomorrow Thanks!
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01-14-2018, 12:24 AM
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#6 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,912
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Re: gas tank replacement
The filler hose diameter is year dependent. Don't remember what the split year is... 1985 is well past the split so your supplier should know.
__________________
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...
And please let us know if and how your repairs were successful. |
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01-15-2018, 08:28 PM
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#7 |
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Registered User
Join Date: Dec 2017
Location: Missouri
Posts: 264
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Re: gas tank replacement
My tanks measured at 1 5/8, the pass is about to come off on it's own! Luckily the seller did throw in new GM braces. I'll post pictures of the new tanks install next month.
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