So I have a 2004 GTO with a Procharger in it. I just had to replace the head gasket last week because it was blown. I haven't had any issues since I've had it back, but I've noticed the past few days that sometimes if I'm driving it for more than 30 minutes and I drive in a lower gear like 1st or 2nd around a parking lot the temperature will start creeping back up. The head gasket was just replaced and a new thermometer was put in also. It does keep it at a lower temperature most of the time, but every once in awhile it will go up. And it will overheat if I run the AC too much also, but I was told that an easy fix for that would be to just put some more fans in. An idea what could be causing the overheating issue? Thanks!