DETROIT U.S. safety regulators are investigating problems with power steering that can stick on thousands of older General Motors SUVs. Investigators are looking into whether repairs made by GM under the extended warranty actually solved the problem with the electric power steering system. In a statement, GM said it's cooperating in the probe, but it does not consider the issue to be a safety problem. The issue is a slight feeling of friction in the steering system that can be an annoyance to customers, the statement said. The safety agency said the probe stems from an owners petition to investigate the matter that was filed in December of 2016.