2006 LC with AHC. Since swapping to much quieter tires from mudders, I now notice an occasional buzzing sort of noise while driving. It is faint and feels like it is underneath me. Sounds a little like a pump or power drill running in a quick burst or two. Not acceleration or brake related. I’m thinking it would make sense if it is the AHC adjusting itself. Should that be silent, if so? Is that a bad assumption? Do I need a tech stream for this? So many questions. . .