Coolant leak

I have a leak coming from the back driver side of the engine (that I can tell). I've read several different places it may be the EGR valve gasket gone bad. I'm not sure if this engine has one let alone that it would cause a major leak. Water pump was last replaced, so I understand that could show that the intake manifold gasket should be done too? Any help or suggestions would be great. I have nothing to lift up the truck so, I'm working with little visual space. Thank you in advance.