The car industry's price war is heating back up, according to the Wall Street Journal. A day after reporting disappointing sales, General Motors boosted consumer rebates by as much as $750 on its best-selling pickups, sport utility vehicles and minivans. GM added a $750 "bonus" discount to its popular new TrailBlazer SUV and slapped another $500 on the hood of its Silverado pickup. The big automaker also sweetened deals on its Avalanche sport utility pickups, the big Suburban SUVs and Astro minivans. For consumers, the latest cuts mark the beginning of what is expected to be a summer of car-buying bargains, according to the Journal.