Absolutely they targeted GM shops. I remember an owner of a profitable GM dealership who interestingly was also involved in conservative causes being interviewed on the news wondering why his dealership was being closed because they moved good volume. I remember thinking how outrageous it was. There was a thread on here about this specific guy and dealership speculating that he was targeted for his political beliefs.
That whole decision stank and made little sense to me then or now. In light of the latest revelations it makes one wonder what criteria was used by the government to close private businesses.
Simple GM was told to use the Stimulas in a certain way, and it was!