^ this. I just pulled a trailer 1100 miles, and it drove me crazy. Why is it that the truck knows the trailer is there, but doesn't engage tow/haul mode automatically? At least if it won't engage automatically, it should STAY engaged after I engage it manually. I just don't understand how it detects a trailer and automatically adjusts the blind spot distance and does other things like increasing the number of flashes when you "tap" the blinkers, but doesn't engage tow/haul mode. Crazy.
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