That's the whole point: the gov was trying to get 90% of the creditors to agree to their 'plan' to shift all their debt and equity to the UAW. Since some of these players are caught on the TARP hook, the gov probably thought this was an offer "they couldn't refuse".
Looks like some of them grew a backbone, and realized they would get a fairer break from a bankruptcy judge than the kleptocrats in the Obama admin and their UAW pals.