The Chevy Volt was the subject of congressional hearing Wednesday as a subcommittee of the House Oversight and Government Reform Committee began hearings about the National Highway Traffic Safety Administration's handling of the delayed crash-test battery fire experienced by one Chevy Volt during testing last year. At issue was whether General Motors received special treatment in the form of NHTSA silence about the test crash result, because 26% of GM stock is currently owned by the U.S. Government as a result of the bailout deal.

House committee members pressed GM and the NHTSA for some evidence that waiting…