Fuel Pump??

Hey got a new fuel pump, was a pain but got it into the tank and all set, worried about a few things with it....But, what is that black box that a fuel line runs to behind the fuel tank next to the spare tire? I have a 2000 ZR-2 and have a chilton just dont have it with me and Im at work just curious what the crap it is...thanks! :)

Part of the EVPA emmisions .
Fuel tank venting system.
MT

Part of the EVPA emmisions .
Fuel tank venting system.
MT

Technically a charcoal canister typically with a purge valve attached used to filter out "hydrocarbons" when the tank regulates pressure release. the unfortunate cause of many useless check engine lights.

Without pictures, I'd say you're referring to the EVAP vent solenoid. The EVAP canister is behind the left rear tire, in the quarter panel.