I have a 2012 1500 LTZ, factory tow package. 5.3/motor 3.42 gears. I tow a trailer that weighs 5500 loaded. I’ve installed a 40k trans cooler. Generally towing it never moves off of 205-210 water temp. On exceptionally long grades the water temp will creep up to about 240. If I pull over and stop it goes immediately down. The radiator has a 1” core which I would like to replace with a thicker one. I don’t see an AC Delco thicker than 1”. Radiator is free of bugs and fins are straight. There are some all aluminum radiators that have thicker cores and tout way better cooling. I don’t care what I have to spend to get a good one. What have others experienced? Thanks for your time.