I am new to this forum. In reading thru some these posts, I see references to transmission temperature when towing. I have a 2015 Chev Silverado 1500, and have pulled a couple other trailers that I own, but I have never paid attention to the transmission temperature. So, what is the normal temperature? Today I drove about 130 miles (no Towing) and paid attention to the temperature. The temperature got up to 187 degrees while driving 60 -65 mph in an outside temp of about 35 degrees. It took about 60 miles to get to this temp. Is this normal?