another story from about 20 yrs ago, Son was shop manager at large GM dealership.
A new chev sold to a lady, forget what happened, loose filter I think.
She drove it for a month , with the red light, cel lights on.
Motor finally packed it in.
She did not get a new motor, had to pay for it because she did not stop and check why the warning lights where on.
She got a lawyer, but he knew that he could not win the case.
They ( shop) or GM? did cover the labour cost, but not the price of the new motor.
Son also told me that every new Duramax that came in had to have a lot of work on it before it could be sold. BTW he is the one that did the New Yorker in my picture, then his son took it over, so 3 generations for it.