Re: Correct Gas Cap for 1965 Suburban ?
I do, as I understand it all the 60-66 Suburban stock tanks have this and I believe it is supposed to help with anti-surge when filling the tank. Fuel nozzle is blocking the opening, fuel is going down main tube and the smaller tube helps to vent/release pressure in tank.
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66 GMC Suburban Custom
66 Chevy K10 Suburban
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