I need help with my truck overheating

Well...I think we got it! Unbelievable but it was the first thing that came to mind. I was thinking radiator and I even said above took it to a reputable shop and had him check it. A second generation owner. And not a young guy. Very reputable he has done work for me before and I stood and watched him flush it and pressure test it. He handed it to me and said this is NOT your problem. So we started over again from scratch today. We took the theromostat out to check it and was going to put it together without it. I know not the greatest idea but I am telling you my mechanic is one of the best around. And he opened the shop just for me to work on it with his guidence to double check me. When we were flushing everything again! we noticed that the water was not going through the radiator right. So to make this long story short I put a new radiator in and so far so good. I have my Challenger on the trailer and I think I will take a little drive with it. Thanks again to all of you with the help. I keep telling people about this site and the people on here and how great it is. This was just one of those crazy problems and you guys came through for me.