Hi tigertiney91 and welcome to TSF,
Freeze plugs are just that. If the engine freezes, the water expansion will push them out instead of cracking the block. They are usually 2" or less in diameter and look like a sheet metal plug in the block. bruiser thinks they are in both the block and heads and redward thinks there is 8 of them. I yeild to both their ideas as I have never counted them, nor traced them down. I have found that there is no freeze plug located where it can be easily changed out while the engine is in the truck. young lion indicated how to remove the leaking plug. By design, they are cup shaped with a dimple in the center. The idea is to hammer it in using the dimple as the aiming point. By hammering on the dimple, it will expand causing a metal to metal seal between the new plug and the block. The need to hammer it in is where the problem lies. There just isn't room to get a good swing with a hammer to put the new one in. The pinging action is required to get the seal, pushing it in with a hydraulic jack will not be the same. Try driving a nail then try pushing a nail and you will get the idea. Pressing it in just won't work for me. Last time I had one leaking, I put in a can of Bars Leak with the idea if that didn't work, I would pull the engine to replace it. Luckily it lasted for several years after that.
Hope someone has a better idea.
Wishing you best of luck,
"If you like yourself others will like you also" me
"Don't drink downstream from the herd" Will Rogers