[BowtieGuy]

Flywheel is covered under 5 year/100k mile powertrain warranty, according to GM. Might want to have a talk with the dealership about that and show them the Engine section. Clearly shows flywheel is covered...

Warranty Coverage: Cars, Trucks, SUVs, Vans | Chevrolet

 

[BowtieGuy]

You may also want to suggest to him that he report this incident to GM customer service.