I would try using low pressure compressed air, might be a little messy but cheaper than getting a new radiator. Just put it threw the peacock.

 

Well the HOAT antifreeze is 5 year/150k miles so if your truck may have needed a flush and change a little while ago. My dad seemed to think mine would be fine after we added mac's 1300 from napa when I got it at the end of 08, but I didn't want to risk it.

 

Good luck finding one on e-bay.I looked for 3 months for one.I found some but wern't 100% sure it was the right one.They had a whole bunch of them without the radiator cap(fill neck).But your is like mine,It has a radiator cap.That link i put in my last post is from a real company,Not a fake e-bay company.It comes with a warrenty and everything( i called them like 10 times and asked many questions).Good luck doing the reverse flush thing,I did that to mines like 5 times and it didn't help at all.Maybe you'll have better luck with it than i did.

 

lol I will take your advice and purchase one; I am going to buy one on Monday. I dont know how long it will take for the shop to get it and install but I will PM to let you know if it fixed my problem. Let me know if it solves any of your problems as well. Thanks for the link, much appreciated...

 

Prestone sells many a radiator flush that you could try http://www.prestone.com/products/coo...Treatments.php It pays to keep your cooling system properly maintained.