Given the multiple sources cited by Electrek and Bloomberg and the specificity of the information, this appears to be a planned leak by GM. In addition, if the information were incorrect and/or GM wanted to correct it it easily could.
GM is trying to play both ends of the game -- making the Bolt as a compliance vehicle in low volumes, and at the same time lobbying to weaken the ZEV credit system and stave off further regulation that could force it to produce EVs in high volume.
Leaking this information rather than complaining about it publicly provides GM's supporters ammunition to continue to claim (incorrectly) that EVs are money losers, while GM itself tries to get a little green street cred from selling the Bolt and hopefully burnish its image a bit with younger and more environmentally conscious car buyers.
For its own good, I would hope that at some point soon GM decides to make the large, long-term investment that is necessary to develop a profitable, high volume EV program. Unfortunately, since that will likely require sacrificing short-term profits for the long-term, something public companies have a hard time doing, I don't expect it anytime soon. EV mandates from China and Europe and EV competition from China may eventually force GM's hand if Tesla doesn't.