2005 GMC 2500HD overheating

It was running 180 on the engine and 160 on the tranny two weeks ago. Of course, it was 75 degrees two weeks ago. I know outdoor temps have something to do with it. I'm sure the AC does as well. So...a flush for sure, and we'll go from there, I guess.

Copperlisa
2005 GMC Sierra 2500HD 6.0
1998 Jayco Designer 29RKS

Seems normal to me.

Check out Killerbee.com
It's not unusual and many guys on this board use his products with the 2005 DMAX engine.
I assume your in S Idaho which was like 110* today. A 8 year old truck will run hot in those temps though. I won't link the funny video on Youtube cause it gets panties in a bunch in the bowtie camp :W
Just curious as to your miles.
Good luck

We bought the truck used early this spring. Heck only knows what it's been through. I'll be taking it in for a flush and t-stat checks in the am. Someone on another forum mentioned the AC condenser could be dirty. That's one I have no idea about. Could that do it? Shutting off the AC wasn't an option. It was 103 at 5 pm.

Right now, the 5th wheel's in the park. No traveling for a while, so it's time to get this all straightened out.

Copperlisa
2005 GMC Sierra 2500HD 6.0
1998 Jayco Designer 29RKS

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.