I don't think you can raise the shift points or firmness to certain level. When you start programing your truck it will ask you if you want to change your shift points or firmness all you will do is hit the yes button and that is it. Unless yours is different than mine, but I do know this can be done on the V8 models.
A forum community dedicated to GMC and Chevy full size owners and enthusiasts. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more!