DETROIT (AP) — For General Motors, the price isn't right when it comes to an ad during next year's Super Bowl. The Detroit automaker said Friday that it won't be advertising on the Feb. 3 spectacle because of a steep price hike demanded by CBS, the network broadcasting the game. "We understand the reach the Super Bowl provides, but with the significant increase in price, we simply can't justify the expense," GM marketing chief Joel Ewanick said in a statement.