Autoblog and Yahoo may earn commission from links in this article.The number of medium-duty commercial trucks available in the U.S. will get smaller this fall as Chevrolet will discontinue its line of Silverado 4500 HD, 5500 HD, and 6500 HD models.Production of Silverado medium-duty Class 4, 5, and 6 commercial trucks, which are co-developed with the International CV Series trucks, will reportedly end on September 30 at International Trucks’ plant in Springfield, Ohio, according to TFL Truck.International Trucks Will Build GM's Medium-Duty Only Until SeptemberChevroletA report from Transport Topics notes that GM did not renew its contract with International (formerly Navistar), which was signed in 2015. As a result, the factory will also stop making International CV Series trucks on September 10, since most of the factory’s capacity was dedicated to Chevrolet Silverado MD trucks.AdvertisementAdvertisementThis was a major factor in International selling the Ohio factory to Canadian defense contractor Roshel on March 30.The obvious question here is why GM opted not to renew the contract with International Trucks, and dwindling sales are the most logical answer. Chevrolet sold just 1,273 Silverado MD trucks in the first quarter of 2026, down 37.4% over Q1 2025. For comparison, Ford sold 2,331 F-650 and F-750 trucks in the first quarter of this year, according to TFL Truck.ChevroletThe Chevrolet Silverado 4500 HD, 5500 HD, and 6500 HD trucks are powered by a Duramax 6.6-liter turbodiesel V8 rated at 350 horsepower and 750 pound-feet of torque. The engine is mated to an Allison six-speed automatic transmission.Four-wheel drive is available, as well as a choice of regular cab, double cab and crew cab configurations with wheelbases ranging from 165 inches to 243 inches. The Gross Vehicle Weight Rating (GVWR) ranges from 14,001 to 16,500 pounds for the Silverado 4500 HD, 17,500 to 19,500 pounds for the 5500 HD, and 21,000-23,500 pounds for the 6500 HD.Chevrolet Will Continue Offering the Isuzu-Developed LCF 3500, 4500, and 5500It’s worth noting that after production of the Silverado MD line ends in September, GM won’t be left without a medium-duty truck. As part of the long-standing commercial vehicle partnership with Isuzu, GM will continue selling the Chevrolet Low Cab Forward (LCF) Class 4, 5, and 6 trucks.AdvertisementAdvertisementThose include the LCF 3500, 4500, and 5500 models, which are rebadged versions of the Isuzu N-Series, and the heavier duty LCF 6500XD and 7500XD, which are rebadged Isuzu F-Series trucks.As for International Trucks, it won’t remain without medium trucks on sale after the discontinuation of its CV Series, as the company’s MV Series will remain available in the Class 6 and 7 segments.This story was originally published by Autoblog on May 11, 2026, where it first appeared in the News section. Add Autoblog as a Preferred Source by clicking here.
