Black Mountain Up and Down advice

I will agree that you need to hold it back a bit going downhill, but if you use your tow/haul mode on your truck and hold it back to about 50 to begin your descent. You are on an interstate highway (I assume you are on I-40), so don't hold it back to 35 or 40 mph. That could get you killed with traffic flying by you going 60 mph. Use your brake to slow you down to about 50, then let it coast on down until you get about 60, then brake again to slow it down to 50. Keep doing this all the way down the mountain.