I don't think its super hot and you're pulling a different trailer setup than I ever have, so tough to compare. I don't think I've ever seen mine go above 210*, and that was pulling a 12' enclosed trailer in upper 90* temps with a 30mph crosswind @ 70mph road speed.
That alignment shouldn't be acceptable, that's not what you paid for.
Do it right or do it again (at no cost). They didn't even get it in the green for their own specs...not cool.
https://www.gmt400.com/threads/1999-gmc-suburban-k2500-dd.48861/page-25
Post #241 has the info and shot of the tag on the alternator.
I can turn front & rear fans on high, headlights on high beams, fogs on high beams, and crank the stereo up and it doesn't even move the needle on the gauge.
I had a set of the Toyo AT3s on my green Tacoma...not low noise at all, and they were P-metrics. Great everywhere else, however.
K02s are GREAT looking tire and wear like iron, but I've found them to be lacking in the wet traction area.
My top contenders are the Yokohama Geolandar G015...