I suspect that there are some monstrously enormous fleet sales to state, fed, and local governments, to union controlled companies, and to people from whom clandestine favors are owed.
Also, union thugs might be "asking" their peeps to buy GM.
All just guesses (from someone with over 2 decades of union membership).
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Most of the 8,000 Chevy Volts sold were sold to government agencies or subsidized under the guise of creating 'green jobs'.
I think it is fairly easy to be profitable if the government erases your debts. How would you do if the government erased your mortgage, student loans, car loan, etc.?