Loose Radiator

I just did my 30,000 mile maintenance schedule, and as a note on the prior oil change I noticed a little "dripage" from the line running from the radiator cap to the overflow tank- where it connects to the overflow tank- and I noticed it again at the 30K maintenance schedule. As I was cleaning the radiator fluid that had dripped from the line and had dried on the outside of the tank, I realized the radiator itself was loose from the frame of the truck, at the bottom attachment points. Lucky for me, I ordered a part for the truck and while I was at the dealer they tightened the bolts up. Just thought I would pass this along as it seems this is a "assembly issue" with my truck, as I have not done anything with this truck that would cause the radiator to be loose from the truck frame.