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#1 |
Junior Member
![]() Join Date: Nov 2023
Location: Austin, Texas
Posts: 35
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1972 C10 Gas Tank Replacement
Looking for any advice on replacing a gas tank for a 1972 C10. How hard of a job is this? Are there any tricks to make it easier?
Access to the bolts holding the tank seems good. I’m a little worried about how hard it will be to wiggle the tank past the hard lines that run to the sender without damaging anything? Also a little worried about the filler neck grommet. How does this get removed? He ordered a tank made by Spectra (GM49B) for 1972 with EEC has anyone used this tank before? If so did you have any issues getting everything to line up? |
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#2 | |
Registered User
Join Date: Dec 2005
Location: Kalifornia
Posts: 341
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Re: 1972 C10 Gas Tank Replacement
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#3 | |
Junior Member
![]() Join Date: Nov 2023
Location: Austin, Texas
Posts: 35
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Re: 1972 C10 Gas Tank Replacement
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#4 |
Senior Member
![]() Join Date: Nov 2018
Location: Waterford California
Posts: 2,531
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Re: 1972 C10 Gas Tank Replacement
Get a new filler neck grommet they are cheap and just razor knife the old one out. Be sure and check but I believe 72 was a little smaller filler neck so it was different
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#5 |
Senior Member
![]() Join Date: Dec 1999
Location: TX
Posts: 1,571
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Re: 1972 C10 Gas Tank Replacement
I'd just cut the rubber grommet like Sheepdip says.
But, make sure you get one of the quality replacement grommets from Wes at Classica Heartbeat or I thinkg GMCPauls sells the same one. The china ones don't last but a few months. |
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#6 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: 1972 C10 Gas Tank Replacement
heres what i did
remove the bench seat, unfasten the lines to the sender unit. go under the truck and disconnect the rubber line to the hard line going up thru the floor. push that hard line down thru the floor as much aas you can. spray spme penetrting oil on the filler neck grommet. . (use a rag so it doesnt stain the paint) unbolt and wigglle out of the grommet mine is a 67 though so i dont have vent lines but it should still be the same process get your grommet from gmc pauls if yours is all dried out or cut off
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1967custom |
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#7 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Re: 1972 C10 Gas Tank Replacement
Best advice....
Wear leather gloves when handling the tank. The edges can be very sharp and your hands will thank you. I ordered the same tank and hopefully your filler neck will be ok through shipping. Do as others have said. If you are replacing the tank, replace all the rubber lines. I would put in a new grommet for the neck, if yours is damaged, you might get some smell in the cab. Smitty
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#8 |
Registered User
Join Date: Jan 2009
Location: South Carolina
Posts: 264
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Re: 1972 C10 Gas Tank Replacement
When I replaced the tank in my '69 C 10 , the filler neck wasn't centered . I drilled the mounting holes oversize and got it centered ok . Good luck
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#9 |
Junior Member
![]() Join Date: Nov 2023
Location: Austin, Texas
Posts: 35
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Re: 1972 C10 Gas Tank Replacement
I got the tank in and everything looks like it lines up. My only problem is my gas cap doesn’t fit the new tank.
Has anyone else had this problem? I can try and get a new cap but I don’t know what part to buy. Im also concerned maybe they built the tank wrong. I don’t want to put any gas in it until I get the cap situation worked out. |
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#10 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: 1972 C10 Gas Tank Replacement
did you get a vented or not vented tank? (71-72 is vented)
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1967custom |
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#11 |
Junior Member
![]() Join Date: Nov 2023
Location: Austin, Texas
Posts: 35
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Re: 1972 C10 Gas Tank Replacement
It is the vented tank with the EEC lines. The new tank neck is slightly bigger diameter and my old cap is loose. The cap pushes in fine but when you turn it it doesn’t tighten up.
Last edited by Jason Bourne; 01-18-2024 at 11:51 AM. |
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#12 | |
Registered User
Join Date: Dec 2005
Location: Kalifornia
Posts: 341
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Re: 1972 C10 Gas Tank Replacement
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#13 | |
Junior Member
![]() Join Date: Nov 2023
Location: Austin, Texas
Posts: 35
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Re: 1972 C10 Gas Tank Replacement
Quote:
I ordered my tank through Rock Auto and I searched high and low but couldn’t find a phone number to call. Their website says they communicate through email only. This may give me pause to order from them in the future. I ended up calling spectra who manufactured the tank. They told me a Stant 10704 should fit my tank. I found one that worked at a local parts store but it is a black locking cap. It will work for now but my son wants a plain chrome one like before. I will look around to see if I can find one online. On the bright side the tank fit great. My son and I had the old tank out and the new tank installed in about an hour. Everything lined up great. I was surprised how easy and fast of a job it was. I saw stories of others where the filler neck was too long and they had to slot the holes in the tank to get everything lined up. I didn’t have any issues at all. The tank feels like a quality build. The steel felt thick not flimsy at all. Anyone needing to replace their fuel tank for a 1972 C10 with EEC I highly recommend the Spectra GM49B tank. Just make sure you have a Stant 10704 gas cap handy. |
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