For a while, GM insisted on linking all of its brands together by putting a little silver GM square logo on each vehicle, be it a Daewoo Chevrolet or a Cadillac. Now, the old GM-in-a-blue-square logo is hard to find--it is off of the RenCen, and missing from most of GM's web pages.
One place it appears to live on is at the GM fleet web site, here: http://www.gmfleet.com/
I suppose if you go bankrupt, and then are reborn as a new, lean company, you may want to tinker with your logo. And if you are GM, you want to emphasize each brand individually, instead of reminding people that their Cadillac has something in common with a Daewoo. But the Blue Square dates back to 1964 according to one source I found, and logos should not be thrown around lightly. Remember how Ford was mocked for changing its top line logo from the blue oval to the company name in script?
