Thanks for the great information. That sounds pretty rough.... After hearing the stories here, I'm going to stay away from any suspension changes other than stock. My heaviest load is my boat at approx. 7,500lb's in which my 2018 2500HD Denali handle's very easily. Also, it appears that these suspension packages may raise the truck one to two inches. My attached garage door is only two inches higher than the spec's of the Ultimate. I do have a pole barn which has a 10' overhead door but, I would rather use my attached garage. Biggest problem is, everything in transit has either the 3500 leaf spring or snow plow package on them. Closest one without, is 260 miles away with the color I want. Thanks again, appreciate it. Ray