1999 Chevy 7.4 liter Gas

[evm]

I broke some type of vacuum line while flushing my radiator.  Now Im trying to ID the line assembly so I can replace it.  I have included a pic.  The line had a 90 with a locking device built into the 90.  The line was made of hard plastic.  The line connects to a rail on the engine and a box near the radiator "where I put the white arrow".  There is also a service port on the line with a green cap.

 

[CamGTP]

It's for the EVAP system.

 

I couldn't find a part number for it and being that it's 22 years old they likely don't make it anymore.You can use rubber hose to fix it or hit up a junkyard.