I don't know much, but this I know:
GM and F make shitty cars, always have, always will;
i have credit cards with C and i only have had good experience with them as opposed to with some other banks.
i don't know what's plaguing C that is different from pretty much all other banks. i suspect that if C goes down, so will 50% of other banks.
C is just too big to fail. GM/F are too small for anybody to care about. the unemployment is going through the roof with or without GM/F going ch11 because of many problems in the economy. so, from the unemployment point of view there is no reason to bail those losers out.
bottom line:
bail C, screw GM/F.