Vacuum leak,low rough idle

[Rod D]

Does anyone know how to take the round connectors of off the two vacuum lines underneath the passenger side of a 2014silverado, mine is leaking air bad, but no check engine light, replaced map,MAF and evap still won't idle above 400rpm,I can see and hear the air leak but I can't see the connector,it Tee to the other 5/16 hoses and runs down the transmission to the ground 

[beetle]

Posting a photo would help.