Chevy is phasing out the medium-duty Silverado produced by International.

      Chevrolet

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      General Motors offers numerous variations of the Chevrolet Silverado, though it does not manufacture all of them. The Silverado 4500 HD, 5500 HD, and 6500 HD are medium-duty Class 6 commercial trucks that share a platform and factory with the International CV Series. However, this unique partnership is set to come to a close.

      As reported by TFL Truck, production of the Silverado MD models will cease on September 30, 2026. Transport Topics indicates that GM chose not to renew its contract with International, which was initially signed in 2015 (at that time, known as Navistar) and established joint development and manufacturing for the CV and Silverado MD trucks. International is also phasing out the CV Series, with production ending on September 10, and has sold the Springfield, Ohio, plant that manufactures the trucks to Canadian defense contractor Roshel, effective March 30, 2026.

      Why did GM make the decision not to extend the agreement? It may be partly due to a decline in sales of medium-duty trucks. TFL Truck highlights that Chevy sold only 1,273 units in the first quarter of this year, reflecting a 37.4% decrease compared to the same period in 2025. In contrast, Ford sold 2,331 F-650 and F-750 trucks in the first quarter of 2026. Additionally, International’s MV Series is offered in the same Class 6 configuration as the CV Series, indicating some competition.

      Introduced at the 2018 Work Truck Show in Indianapolis, the Silverado MD features a Duramax 6.6-liter turbodiesel V8 engine that produces 350 horsepower and 750 pound-feet of torque, paired with an Allison six-speed automatic transmission. It offers four-wheel drive and comes in regular cab and crew cab configurations, with wheelbases ranging from 165 inches to 243 inches. Gross Vehicle Weight Ratings (GVWR) vary from 14,001 to 16,500 pounds for the 4500 HD, 17,500 to 19,500 pounds for the 5500 HD, and 21,000 to 23,500 pounds for the 6500 HD.

      According to Transport Topics, most of the Ohio plant’s production capacity was allocated to the Chevrolet-branded trucks, which influenced International’s decision to sell. The company has been manufacturing trucks and buses at that location since 1961. The factory withstood the cuts during the 1982 reorganization of International Harvester (which resulted in the closure of its Fort Wayne, Indiana, plant) and is now receiving another opportunity under Roshel. The Canadian firm acquired both the assembly facility and an adjacent specialty truck center, encompassing two million square feet of space on a 500-acre site.

      GM still has one joint-venture commercial vehicle in its lineup. It plans to continue offering the Isuzu-derived LCF (Low Cab Forward) series in Class 4, 5, and 6 configurations for the 2027 model year. However, the largest U.S. automaker is now exiting the mega chassis cab segment, where Ford remains active.