DETROIT — Automaker Stellantis plans to indefinitely lay off up to 2,450 U.S. factory workers later this year as it discontinues production of an older version of its Ram 1500 pickup truck in Michigan. The truck has been largely used as a low-cost pickup to sell to entry-level buyers and fleet customers since the automaker introduced a new generation of the Ram 1500 in 2018. It is produced alongside the Jeep Wagoneer and Grand Wagoneer at the Warren Truck Assembly Plant, located near Detroit. The current Ram 1500, which was recently updated for the 2025 model year, is produced at a nearby plant. Operations at that facility will continue as planned. “With the introduction of the new Ram 1500, production of the Ram 1500 Classic at the Warren [Michigan] Truck Assembly Plant will come to an end later this year,” the company said in an emailed statement. The discontinuation of the Ram 1500 “Classic” vehicle is not unexpected, but the company has not announced a vehicle to replace the truck. That is concerning for local governments, workers and the United Auto Workers union, which represents the plant.