fuel check valve

[nj96z28]

noticed this line was open during LCA install. What goes here? Ive heard its a fuel check valve but I can find no such thing on gmpartsdirect or newgmparts.
Anyone know? have a pic or a part number?

Its on the driver's side of the fuel tank on a 4th gen z28

[//<86TA>\\]

i think it should be a roll over valve/vent fitting
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Ffm Homemade (http://www.****tube.com/categories/545/homemade/videos/1)

[nj96z28]

it looks like its called a vent valve .... going by this diagram on gmpartsdirect anyway.

[maroman88]

yup i have it on the 3rd gen

[nj96z28]

Ok ,its none of the above. I decided to remove the filler cap and plastic shroud to take a look . the line is coming off the evap canister...... appears to go along side the tank towards the front of the car. I guess ill have to drop the damn tank to reattach it.