What Are The "Four Core" GM Brands?S

Fritz Henderson, GM CEO and possible cyborg, said the company's plan is built around "four core brands." He also said people shouldn't speculate, which we're guessing was a joke. What will the four brands be?

GM currently has eight brands to contend with: Hummer, Chevy, GMC, Buick, Pontiac, Cadillac, Saturn and Saab. We're curious to hear what you think about these brands so we won't eliminate any four of them for you. But let's just say we're not betting on Saab making the cut. Help us design the new GM. What brands make the cut? [BusinessWeek]