Sorry for such a big picture but this is what my temp got to after runing 60 on the interstate for about 15-20 minutes with cruise control. Is this normal or do I need to look for something? I know a lot of people say that this is just the way Chevy made it but this is a bit extreem I would think?

 

Okay? Why did my picture not show up?

 

driving on the highway/freeway with no stop and go traffic should not cause your temp to increase. If anything, it should keep your car cooler from the cool air flowing under your car and the coolant freeflowing through your radiator and engine. You may have a blockage or be low on coolant.