I’m not a car expert. But I have little sympathy for the car companies or unions.
Perhaps its due to the dealers lies, poor quality, union abuses or EXTREME poor management some of those companies have had for decades.
While in the military I had one dealer lie about the year on a used car. Bought stuff for a tuneup and nothing fit. Come to find out it was 2 years older than they said. I never imagined a dealer would lie about the year a car was made. I had to go the DA before the dealer would refund my money.
Dealers can and do cause problems for the manufacturers. A good dealer is the key to satisfaction.
My son bought a Camaro from a “friend.” It had one problem, it would overheat when the weather warmed up. It would sit and idle all day, but when it was moving, it would overheat. The local Chevy dealer did not have a clue. Their only response was to replace the water pump. Instead, I took it to an independent mechanic who knew immediately what was wrong. The “air dam” directly under the radiator was broken off. That was relaced with a part from a junkyard. Overheating was solved. When I bought my first car in 1970 it was a 1966 LTD, after about a month it would stall, again the dealer did not have a clue or possibly the will to work on it. A neighbor suggested I replace the fuel filter; I did and kept that car until 1977.