What is this? What does it do? What does it connect to?

[60 Driver]

12597341 MX136200-3330 is the number off what I will call the Fuel Vent Solenoid on the plenum. (pointed out by the flat tip)

Secondly, where do I need to connect the vent off the fuel cell?

2008 5.3 LY5 donated by a Chevy Silverado.

I have searched for hours and there are multiple common questions, none exactly answering my specific question. Please point me in the right direction if this has already been answered.

Thanks in advance! Standing by for guidance.

[Indian113]

PM the mods and get this moved to the LS build section, man it's in La La land here.

[60 Driver]

Indian113, Thanks for the recommendation! Post #3 there, I'm still in La La land...