i have an 02 silverado 2500 hd with a 6.0 and towing package. a superchips tuner. i just bought a trailer toy hauler 7500 lbs dry and was towing it today dry and uphills the temp got a bit warm not to the hot but halfway between mid line and the red it was a 7 percent grade where it warmmed up like that. also the tranny temp went up to like 2 clicks past center. i am getting an upgraded oil cooler installed next week but whats safe? having the temp go up like that safe for me? the oil cooler will solve it getting 2 warm but what about the water temp. a coolant additive work? water wetter?