I have this same issue with my 2015 5.3L Silverado.
23,000kms
Just noticed it at about 20,000kms.
Anyone else have the issue and bring up with their dealer?
I'm going to dealer in a couple days, should be interesting to see what they say about it if its a common problem.
Have take the truck in twice now and each time they need to install "spacers" which took 3hrs each time........
I hope this isn't a "spacer" issue as well......