Escalade/Denali or Suburban 2500

I do have the tow haul turned on always when towing. The difference that is clearly felt with tow/haul on is firmer shifts at a later rpm. The downshifting issue from 4th to 3rd at highway speeds is with tow/haul turned on. Cruise control is basically not useable as any slight acceleration cruise needs to maintain speed will cause a downshift. I can go faster (barely the speed limit) if I don’t use cruise and try to hold a steady foot at the Max power I can hold in 4th gear right before it would downshift to third. My other trick is to put the computer on “instant mpg”. 4th gear at 9MPG is the magic number to maintain. The slight acceleration that would drop instant mpg to 8mpg will result in a downshift to third even with tow/haul on.