I hate "tow/haul mode"... I don't run it all. Especially when towing or hauling...
I know I'll catch "heck" for saying this, but "tow/haul mode" just does not work for me..
I can't and won't explain it here, as it'll take a lot of typing and no one will still get it...
But, in a nut shell, don't RIDE THE BRAKES when going down hill and you can MANUALLY downshift your automatic trans if you want/need engine braking..
But, you don't need to rev to 6000 rpms to keep you at 30 mph just to keep you off the brakes...
Anyway, fire away... I have T/H and have used it and didn't like it.. I have not EVER faded my brakes. I do see even semi trucks ride their brakes down the grades and smell their burning brakes.. But, I try to stay behind them, because I don't want them behind me when they do eventually fade...
Good luck, Mitch