I have the same issue with 2024 Silverado HD. Driver side mirror is incredibly loose, to the point i think it'll come off anytime i hit a bump. Truck is well within warranty. Took it to the dealer twice for this issue, and they said they cannot fix it because it is not "broken". I asked the dealer if they would fix the dings and damage when the mirror finally fell off and they said to provide documents proving that i brought it in for repairs to prove this was an issue if it falls off.