No, but the bearings are. So is the block.
I am assuming its either bearings or the block getting damaged due to improper rod/crank tolerances, possibly bad casting.
Which happens. It’s not necessarily a DIE related thing or a GM penny saving ordeal.
They’ve narrowed it down to the crankshafts.
“The connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure.”
“GM’s updated field data analysis identified a build period from March 1, 2021, to May 31, 2024, with an increased rate of potentially related engine failure claims. GM’s investigator reviewed findings from teardowns of field engines and data from a study of new, unused crankshafts. Supplier manufacturing and quality issues were identified at intermittent periods within the suspect build period, including (1) rod-bearing damage from sediment on connecting rods and crankshaft-oil galleries; and (2) out of specification crankshaft dimensions and surface finish.”
https://static.nhtsa.gov/odi/rcl/2025/RCLRPT-25V274-1598.PDF