Swapped to a 20 gallon tank - The 1947 - Present Chevrolet & GMC Truck Message Board Network

74 shortbed 406 · 12-02-2008, 08:34 PM

I swapped out my 16 galln tank for a 20 gallon tank. My problem is finding a filler hose to work since I had to take out the piping since the 20 gal is longer. Anyone know where I can get one.

willett · 12-02-2008, 09:10 PM

should be the same filler out of any long box truck

asphaltburner · 12-03-2008, 01:01 AM

Yo! I junkyard shopped and had my choice of filler necks!
Even matched up one that would allow the cap to tighten up close to the new flush cut hole in the fender, as opposed to the factory one that resides at the bottom of a recessed hole (and the cap protrudes a bit more). Todd.

D-Day · 12-03-2008, 06:02 AM

Filler hose or filler neck? Incidentally, I just ordered a filler hose from the dealer today, and stopped by my friend's garage and he had a couple of old filler necks. Got the passenger side for $5.

The filler neck I have has something wrong with the lip that secures the cap...you twist the cap all the way on, it slips and wobbles around loose as a goose. Gotta turn it just right to get it to stick, and even then it might not hold. Real pain.

74 shortbed 406 · 12-03-2008, 10:00 AM

I need the part the goes from the pipe that the gas cap screws to and the tank.

D-Day · 12-03-2008, 10:32 AM

You need it for the driver or passenger side? I bought the passenger side, but my neighbor still has the driver side filler neck. If you're interested, I could take a picture of it and put you in contact with him.

edit: I read that wrong. Confirm, do you need a rubber or metal piece? This would help.

If it's rubber, you can order one from the local dealer.

asphaltburner · 12-03-2008, 09:52 PM

Yo! If you need to know the name of parts, I've found LMC Truck to be a great source through the diagrams in their catalogs,...lmctruck.com. Their printed catalog has great "blown up" diagrams of most systems!
The diagrams really help you to know what is there before you start a project, help with disassembly, and make it easier to find the parts you need by appearance and name.
Not as good as a shop manual, but alot cheaper too! FREE.
That'll show you the filler neck with vent tube, the rubber filler neck and vent hoses, and the tank and cap. Those are the parts you're asking about. Todd.

12-02-2008, 08:34 PM	#1
74 shortbed 406 Registered User Join Date: May 2005 Location: Bowling Green, Mo Posts: 204	Swapped to a 20 gallon tank I swapped out my 16 galln tank for a 20 gallon tank. My problem is finding a filler hose to work since I had to take out the piping since the 20 gal is longer. Anyone know where I can get one. __________________ 1978 GMC K25 2002 Dodge Dakota R/T rc swb In need of some more goodies.

12-02-2008, 09:10 PM	#2
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: Swapped to a 20 galln tank should be the same filler out of any long box truck __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

12-03-2008, 01:01 AM	#3
asphaltburner Registered User Join Date: Jul 2008 Location: Ault, Colorado Posts: 862	Re: Swapped to a 20 galln tank Yo! I junkyard shopped and had my choice of filler necks! Even matched up one that would allow the cap to tighten up close to the new flush cut hole in the fender, as opposed to the factory one that resides at the bottom of a recessed hole (and the cap protrudes a bit more). Todd. __________________ '78 3/4 ton 4x4 custom "Todd-built" FRANKENTRUCK! Last edited by asphaltburner; 12-03-2008 at 01:02 AM.

12-03-2008, 06:02 AM	#4
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Re: Swapped to a 20 galln tank Filler hose or filler neck? Incidentally, I just ordered a filler hose from the dealer today, and stopped by my friend's garage and he had a couple of old filler necks. Got the passenger side for $5. The filler neck I have has something wrong with the lip that secures the cap...you twist the cap all the way on, it slips and wobbles around loose as a goose. Gotta turn it just right to get it to stick, and even then it might not hold. Real pain. Last edited by D-Day; 12-03-2008 at 06:02 AM.

12-03-2008, 10:00 AM	#5
74 shortbed 406 Registered User Join Date: May 2005 Location: Bowling Green, Mo Posts: 204	Re: Swapped to a 20 galln tank I need the part the goes from the pipe that the gas cap screws to and the tank. __________________ 1978 GMC K25 2002 Dodge Dakota R/T rc swb In need of some more goodies.

12-03-2008, 10:32 AM	#6
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Re: Swapped to a 20 galln tank You need it for the driver or passenger side? I bought the passenger side, but my neighbor still has the driver side filler neck. If you're interested, I could take a picture of it and put you in contact with him. edit: I read that wrong. Confirm, do you need a rubber or metal piece? This would help. If it's rubber, you can order one from the local dealer. Last edited by D-Day; 12-03-2008 at 10:35 AM.

12-03-2008, 09:52 PM	#7
asphaltburner Registered User Join Date: Jul 2008 Location: Ault, Colorado Posts: 862	Re: Swapped to a 20 galln tank Yo! If you need to know the name of parts, I've found LMC Truck to be a great source through the diagrams in their catalogs,...lmctruck.com. Their printed catalog has great "blown up" diagrams of most systems! The diagrams really help you to know what is there before you start a project, help with disassembly, and make it easier to find the parts you need by appearance and name. Not as good as a shop manual, but alot cheaper too! FREE. That'll show you the filler neck with vent tube, the rubber filler neck and vent hoses, and the tank and cap. Those are the parts you're asking about. Todd. __________________ '78 3/4 ton 4x4 custom "Todd-built" FRANKENTRUCK! Last edited by asphaltburner; 12-03-2008 at 09:54 PM.



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