General Motors will end production of most of its largest Silverado trucks when its contract with International Motors expires on Sept. 30, 2026, a move that cuts back a medium-duty program the automaker says no longer fits demand for diesel-powered delivery vehicles.
GM confirmed on May 15 that it will not renew the agreement first signed in 2015 with Navistar, now International Motors, to build the Silverado 4500HD, 5500HD and 6500HD. The decision also means select Chevrolet Express and GMC Savana Cutaway van variants will be cut on the same date, though GM said it will keep producing the majority of those van cutaway versions at its Wentzville Assembly in Missouri. No layoffs were announced with the decision.
The trucks have been assembled in Springfield, Ohio, where GM supplied the 6.6-liter turbodiesel V8 engines and bodies and International supplied the chassis and final assembly. The venture has been part of a broader split in the work: GM and International built the medium-duty Silverados together under the contract, while the Springfield site handled the physical build. GM said it is still evaluating future portfolio options for Medium Duty and did not say whether it will replace the joint program with another partner or a new in-house setup.
The move narrows GM’s presence in the segment but does not remove it entirely. The company still produces low cab forward trucks in 3500 to 7500 variants in both gas and diesel, and it will continue making most of the Express and Savana cutaway vans after the contract ends. That leaves GM with a smaller medium-duty footprint at a time when demand for heavier diesel delivery trucks has softened.
The Springfield operation has its own uncertainty beyond GM’s decision. International Motors sold operating assets of the Springfield facilities to Roshel on March 30, and Roshel agreed to speak with the UAW about continued employment as part of the transaction. About 1,325 UAW workers operate the Springfield site between the assembly plant and truck specialty center, making the facility a major industrial employer in the area.
Analysts said the decision reflects a practical retreat from a niche where GM never had the same dedicated commercial-truck setup as some rivals. Sam Fiorani said this style of truck for heavy duties is not their place, and added that GM saw a necessary market to be in but not enough to justify a dedicated chassis the way Ford and Stellantis have done. The company’s own wording was more measured: Katie Adams said GM is evaluating future portfolio options for Medium Duty and will share more information as it becomes available.
The timing also follows a pattern for GM in commercial vehicles. Last year, it discontinued the BrightDrop commercial electric van in Ingersoll, Ontario, after weak sales and a lack of demand. This latest cut is narrower, but it points in the same direction: GM is trimming programs where the business case has weakened, even if that means stepping back from a product line it helped shape. For Springfield workers and customers that depend on the larger Silverado variants, the important date is now fixed — Sept. 30, 2026 — and the company has not said what, if anything, takes their place.
