[Tupelo]

I suspect the fault is more from a supplier than than from GM or their employees. I seriously doubt that any automobile assembly line installs brake pads. They are a very small component of much larger components (wheel assemblies) that arrive at the assembly plant.
That said, I wonder how those assemblies got into the GM plant. How those assemblies got installed on the automobile. And last how those assemblies were missed at the final inspection.

[Figment]

How those assemblies got installed on the automobile. And last how those assemblies were missed at the final inspection.

Bingo.Your questions are right on the money and can’t be answered with just an every day human error. This had to intentional on someone or several someones part.There needs to be a criminal investigation