Money Fiat Chrysler merger with Peugeot maker PSA Groupe creates 4th largest automaker October 31, 2019October 31, 2019 Eric D. Lawrence, Detroit Free Press Comments Off on Fiat Chrysler merger with Peugeot maker PSA Groupe creates 4th largest automaker Fiat Chrysler Automobiles and PSA Groupe released details of their merger plans. The marriage will create the world's fourth-largest automotive group.