Hi Scottie,
What presure pound age is on the Rad cap ? and change both the top and bottom hoses, that way, you know that both are new and when you refill your cooling system we over here in the UK use a 50 50 mixture of a good anti freeze and deionised water, that way, we know we wont be having any gunk in our cooling system, later on, plus the fact, the deionised water helps to let the truck run a mite cooler too
you take care and the very best of luck scottie. regards Jack.