I don't think I have that vacuum servo because I couldn't find any vac lines going anywhere under the battery tray. Also all the buttons work on the steering wheel. When the truck sets itself at 50, I can press the cruise button to turn it off or I can press the cancel button. One time I was driving and I had cruise set to 40, then the truck decided to set itself at 50 and I could fight the truck by pressing the coast button.