I found that the customer service reps weren't relaying the proper info to the technicians. It might help to leave a note in your truck asking to look up the bulletin number.
When I booked it in this last visit, i felt like the guy didn't take note of half the info i gave. Like the noise goes away when cranking the wheel hard left. This was my 4th visit regarding this issue, and 2nd time saying the turning left "fix".
When I dropped off the truck, another guy took the keys and I mentioned it again. He checked the system and nothing was noted. I told hime about the bulletin and it seemed like he made note.
Couple hours goes by and I get the phone call saying that information helped a lot.
Good luck, the fix is out there.. Lol