Stellantis Evaluates Moving Heavy-Duty Ram Production From Mexico to Michigan

The outcome of where the next generation of heavy-duty Ram trucks will be built is currently being decided not in a boardroom, but in the quoting departments of tier-one automotive suppliers. Stellantis has initiated a formal cost-assessment process, asking its parts network to calculate the exact financial impact of shifting production of the Ram 2500 and 3500 from Saltillo, Mexico, to Warren, Michigan. This supplier-level math is the definitive hurdle for any manufacturing relocation, because the cost of sourcing components domestically must be weighed against the heavy import tariffs currently levied on vehicles built south of the border.[1][3][4][5]

For the prospective truck buyer, these supplier quotes dictate whether the sticker price of a 2027 Ram heavy-duty pickup will hold steady or spike. Stellantis currently faces import tariffs of up to 25 percent on vehicles manufactured in Mexico, a penalty that directly eats into the profitability of its most lucrative segment. While manufacturing in Coahuila offers lower labor costs, the compounding effect of these tariffs has forced the automaker to reevaluate its North American footprint. Stellantis has not issued an official statement on the matter, and the supplier executives involved in the preliminary studies have declined to be named publicly.[1][3][5]

The proposed destination for this manufacturing homecoming is the Warren Truck Assembly plant, a facility located just north of Detroit that has built trucks since 1938. The 3.31-million-square-foot plant currently operates with significant excess capacity following the discontinuation of the older-model Ram 1500 Classic. Right now, the facility only produces the Jeep Grand Wagoneer, leaving ample floor space and workforce bandwidth to absorb the heavy-duty Ram lineup.[2][3][5]

Moving production back to Michigan would align Stellantis with the strategies of its primary domestic rivals. Both Ford and General Motors already assemble their heavy-duty pickup trucks within the United States, insulating those models from cross-border trade penalties. General Motors recently expanded its heavy-duty truck output in Flint, Michigan, while Toyota has committed $3.6 billion to shift Tacoma production from Mexico to Texas by 2030.[1][5]

The Saltillo Truck Assembly plant, which spans 212,850 square feet, has been the manufacturing hub for Ram's heavy-duty lineup since 2009. It currently builds the Ram 2500, 3500, 4500, and 5500 models, exporting them to more than 45 countries.[1][3]

If the heavy-duty models depart, the Mexican facility would likely pivot to support other global market demands. The plant recently resumed production of the light-duty Ram 1500 to supply international buyers, indicating that Stellantis still views the Coahuila complex as a vital part of its global export strategy.[1]

The financial equation remains complex. While avoiding tariffs is a massive incentive, Stellantis must balance that against the higher costs of domestic parts and the wages of United Auto Workers (UAW) employees, who secured record pay increases in their most recent contract negotiations. The UAW contract, which runs through April 30, 2028, establishes a higher baseline for labor costs that the domestic supply chain must absorb.[3]

Pricing power adds another layer of pressure. Because Ford and General Motors build their competing trucks domestically, they are unlikely to raise sticker prices, forcing Stellantis to hold its own pricing steady regardless of where the Ram is built. The tariffs reduce Stellantis's profitability either way—whether the trucks continue to be made in Mexico with tariffs applied, or are made in the U.S. with higher-cost parts and more expensive labor.[3]

No final decision has been made, and the automaker characterizes the current supplier consultations as preliminary "trapline" studies designed to gauge feasibility. However, the urgency of the evaluation highlights how shifting trade policies are reshaping the industrial landscape. If the supplier math proves favorable, the Warren Truck plant could soon see a massive influx of investment, securing thousands of local jobs and ensuring that one of America's defining work vehicles is once again built in its own backyard.[2][4][5]