2005 GMC 2500HD overheating

Copperlisa wrote:
This heat wave in the West is causing havoc. The truck is overheating without the 5th wheel on...and I need assistance. Engine temp is just above 210, and the tranny temp is right about 200. I'm sure the AC has something to do with it, because the lower I turn the AC, the more stable the temp is. Radiator is full.

Please give me some ideas of what to look for and what to not be taken advantage on. My dad was a professional mechanic and passed on two years ago.

Thanks!

Is the truck around farms much, ie: hay fields and such? The radiator could be partially stopped up or you could have one or both of the t-stats stuck open. It's hard to say, but you guys have had some hot azz weather there lately. 210* really ain't bad for what you are going through just don't let it go much more.