General Motors Co. conducted an additional 16 tests on cars with the defective ignition switch linked to at least 13 deaths to further support its position that the vehicles are safe to drive with only the key in the ignition, according to a document posted online by U.S. safety regulators.
The No. 1 U.S. automaker said it removed parts from the faulty switch to make it easier for a single key to move out of the "run" position, but the switch did not malfunction in the additional tests, which were completed after a similar round in March, according to a GM report filed by the U.S. National Highway Traffic Safety Administration.
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