So, my truck started leaking coolant again. I went out for some food last night, and when I got back, I noticed some leakage from underneath the vehicle. It's not as significant as it was before, nor was it a problem with the brand-new radiator, but I lucked out beyond belief.
One of the coolant hoses cracked, and that's the only leak in the vehicle. It's just barely hidden beneath a few other of the topmost hoses, so it should be a relatively easy fix.