General Motors and the Canadian Auto Workers are scheduled to negotiate around the clock today, the Detroit News said, adding that both sides were optimistic they would reach a new labour contract covering 18,700 GM workers before a midnight strike deadline tonight. CAW leaders yesterday told the newspaper that the two sides remained divided on annual pay raises, cost-of-living adjustments and income security for thousands of laid off workers at GM plants in St. Catharines, Ontario, and Ste. Therese, Quebec.