UPDATE 1-Fiat Chrysler accused of concealing defect in Jeep Grand Cherokee

LOS ANGELES, June 23 (Reuters) - Jeep Grand Cherokee owners on Thursday filed suit in California against Fiat Chrysler , accusing the automaker of concealing and failing to fix a shifter design defect linked to driverless rollaway accidents, including the death this week of "Star Trek" actor Anton Yelchin.