Detroit's automakers, already caught in a brutal battle of incentives and pricing, may have to offer even greater spiffs to buyers of sport utility vehicles and pickups heading into next year as they try to boost sales in a weaker market, according to a Reuters report. General Motors Corp. and Ford Motor Co. have both announced higher truck production targets in North America for next year's first quarter, despite forecasts for falling industry sales and more competition from foreign automakers. Inevitably, the world's two largest automakers will either have to cut production early next year or, more likely, increase already high consumer incentives as they battle to boost their share of the U.S. market, analysts said, according to Reuters.