4 Min Read NEW YORK (Reuters) - U.S. automotive safety regulators reviewed evidence related to an allegedly defective steering sensor that was used in roughly 778,000 older General Motors Co vehicles but ultimately decided against opening a formal investigation into the matter. Slideshow ( 2 images ) The National Highway Traffic Safety Administration (NHTSA) told Reuters about the previously unreported review. The agency evaluated information related to a lawsuit against the automaker brought by the widower of a 42-year-old woman who died after her 2007 Chevrolet Trailblazer SUV crashed, according to documents Reuters reviewed. The cause, her widower alleges in the lawsuit, was a defective steering sensor that the automaker failed to adequately warn drivers about despite long knowing the component had issues.