+1 to both comments.
In addition to those two factual statements, there is also the reality I mentioned earlier, namely that no manufacturer is legally required to supply parts for more than 10 years, so it would be very interesting to hear the OP’s legal argument in support of his theoretical lawsuit against GM.
If the OP was able to get an attorney to take this case, it would be dismissed by the court before it could be brought to trial.
