So I was getting the trucks ready for tomorrow and I noticed it has a lot of play in the area indicated (see pic). Also needs a new boot. This is the front/lower part of the truck.

So my question is, what do I need to replace?? I didn't wanna tear it down because my son will be opening his Summit for our X-mas (yeah, a tad early) tomorrow morning and I wanna cruise around in the snow with him. Is this area like a ball joint and does anyone have any ideas on what I need to order, or do I need to tear it apart first???