(http://media.il.edmunds-media.com/chevrolet/volt/ns/chevrolet_volt_prf_ns_12312_196.jpg) The National Highway Traffic Safety Administration (NHTSA) late Friday said it had closed its investigation into post-crash fire risk in the Chevrolet Volt, as a Congressional committee prepared on Wednesday to open its own probe into how General Motors and federal safety regulators handled the investigation.
InsideLine