Heating question

[Broken_down?]

when I drive to chico about 30 miles from my house my trucks runs between 190 and 200 deg on the highway running 60-65 mph when it is hot outside. On the stock gauge it is half way between cold and hot. And pulling big hills like mountain type it gets over half way, maybe 220 to hottest 250. any higher then 250 I shut her down. I am not pulling anything. know i know you guys are pulling campers/trailers/other pickups etc.. and I never hear about you guy heating up. round town the truck hits 160 deg max. how can I cool it down running highways and hills? are you guys using huge radiators?

Rich