General Motors Co. earned $7.6 billion last year, the highest profit in company history.

But some problems surfaced in the earnings report, and GM executives say there’s more work ahead.

GM’s share of the global market should hold steady at 11.9 percent this year, but GM lost $747 million in Europe last year, and the region’s economy isn’t likely to improve in 2012.

GM also says its global pension plans are worth $24.5 billion less than their obligations.