A slump in US sales was the main culprit, with the share of GM's Buick, Chevrolet and Cadillac marques standing at an 80-year low. 'We expected a difficult quarter and that's what we saw,' said finance chief John Devine.
GM shocked analysts by withdrawing its guidance for full-year profits, issued only last month. The car maker said the spiralling cost of healthcare continued to cloud the outlook for earnings.