2013 isx 15 2350 help please

[rraccerr]

Hello Team!
Been trying to see Mr Haggs, but the bill collectors at the door. Right now my coolant reservoir shows less than minimum every morning after idle few hours and shut down at night. When I start engine, the reservoir rises to over full. The pressure pushes it out diffrent locations every morning. Coolant supply to EGR, Bottom of EGR valve, the scr supply coolant tube. Back bunk heater hose.
So I put a hole in radiator cap to release pressure and the reservoir shows no loss but still coolant on ground. Pressure is forcing it out. The engine only has 18 thousand miles from a out of frame rebuild with the same computer remadate. Saw a egr cooler by passs and wondered if this is for me?
You input and time with response is appreciated , be well