Had a sensor fault, speed limited in 50mi, dealers couldn't touch it for a week. Then they fixed it w/ a 2min flash.
Tried KEM green tunes. Waste of time, money and aggravation. Ran like crap, got lousy mpg and thought the trans was going to break itself.
Stuff fell off my truck at 6kmi. Never looked back.
Runs great, mpg came up a tad.
Hard on tires.
Around 25kmi I had the reverse delay recall done which requires pulling tcase and trans. Nothing was said about stuff having fallen off my truck, though I asked them to flash it with the latest software patches. We jumped thru every hoop we could think of and couldn't get IDS to talk to my truck. Finally just put the tunes back on and moved on with life.
Almost 50kmi now, No regrets.