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#1 |
Registered User
Join Date: Sep 2015
Location: Lake Placid florida
Posts: 599
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Can't find a gas cap (1972 only?)
I have a 1967. Someone must have changed the tank before I bought the truck. The 1967 cap will not fit.
So I'm guessing it's a 1972 tank. Might this be a 72-78 cap? I'm looking for a stylish locking cap, but I'm afraid most (which don't show the back) won't fit. So can you 1972 guys (assuming I'm correct) confirm/recommend something? thanx
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1967 C-10 4-speed, 350v8 Last edited by dave`12; 02-06-2019 at 12:53 PM. |
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#2 |
Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,337
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Re: Can't find a gas cap (1972 only?)
Dave I have a 71 with California emissions system, charcoal canister. The caps I bought at NAPA where junk from China. Rubber perished quickly. I determined they where generic ones used for outboard motor gas tanks.
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71 C-20 07 Magnum RT AWD |
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#3 |
Registered User
Join Date: Jan 2014
Location: SoCal
Posts: 281
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Re: Can't find a gas cap (1972 only?)
Your gas filler neck looks the same as on my '72 C20. I used a '70, fits great. As I understand it, '72 C20s had no emission regulations yet, so it has a different filler neck than the C10s.
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#4 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Can't find a gas cap (1972 only?)
For my 71 gmc I just went to running and bough one for a Ford 8n. It fits othe tractors too. But it works great with my pickup.
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#5 | |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Can't find a gas cap (1972 only?)
Quote:
Thanks!
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#6 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Can't find a gas cap (1972 only?)
Check if the tank has plugged off emission lines at the top corner on the passenger side. That will tell you if its a 71 (has lines) and later or 70 and earlier. (nothing there)
Then go to the stant website and lookup cap numbers.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#7 |
Registered User
Join Date: Sep 2015
Location: Lake Placid florida
Posts: 599
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Re: Can't find a gas cap (1972 only?)
Thanx for the info. I was hoping someone with a 72 would recognize the inside of the cap, it is different than the 67 for sure.
@demian5, here are a couple of pics of the tank. I'm pretty sure it's a vented emissions tank, but that hasn't helped me. @71gmcC15 Are you saying some ford ones fit? Would you happen to know the years/models? Not sure what an 8n is (tractor) If it's only tractor, probably would not help as I want something that looks custom. Does your cap and filler neck look the same inside as mine? I've ran the hose from the passenger side of the tank out of the cab, so I have vent. Much thanks to all!
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1967 C-10 4-speed, 350v8 |
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#8 | |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Can't find a gas cap (1972 only?)
Quote:
Your best to plug them all off and get a 70 and earlier cap.
__________________
"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#9 | |
Registered User
Join Date: Sep 2015
Location: Lake Placid florida
Posts: 599
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Re: Can't find a gas cap (1972 only?)
Quote:
Truck smelled like gas in cab when I bought it. I blocked everything off and pressure became a problem. I drilled 2 holes in cap. Pressure gone, but the smell of gas was coming in the cab from the cap. I ran the passenger side of the tank hose out of the cabin below the vehicle. No smell at all now. None. I will check into the numbers you supplied, but I'm looking for somthing custom looking, so I doubt stant will be the answer. Thanx!
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1967 C-10 4-speed, 350v8 |
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#10 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Can't find a gas cap (1972 only?)
The gas cap package had a list of about a million different tractors. 8n was just one I remembered. It looks like our fillet necks are the same. I do have an evap canister. So I asume its an emission tank
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#11 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Can't find a gas cap (1972 only?)
Here are my findings from my own adventure. Should be what you are looking for.
http://67-72chevytrucks.com/vboard/s...d.php?t=778951
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#12 |
Registered User
Join Date: Jul 2002
Location: St. James, MO
Posts: 1,239
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Re: Can't find a gas cap (1972 only?)
Our trucks came from near the end of an age that didn't believe in re-inventing the wheel for every vehicle every year. If there was a gas cap or radiator cap already being made, why not employ it?
Now, interchangeability is just about lost.
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'69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt. |
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