Are any of you having over heating issues while towing? Just this past week I towed a 21ft toy hauler with two quads and a bunch of gear from Long Beach CA to Pizmo beach. Truck did fine the whole way up until I had to pull a long hill, my coolant temp gauge started moving steady up. Luckily I didn't have to pull over BUT on the way back home around the thousand oaks area on the 101 the temp gauge got all the way up and I had to pull over to cool down. Are the stock fans not efficient enough to cool these trucks down while towing? It was 89 outside with a good breeze.. anyone else havin this problem?