RIP Pontiac. Today, GM announced plans of speeding up its restructuring by shut over 40% of its 6,200 U.S. dealerships by 2014 and phasing out Pontiac brand by 2010. GM plans to continue to invest in Chevrolet, Cadillac, Buick and GMC. By the end of 2009, GM plans to spin off, sell or close Hummer, [...]